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LAWR£NCE S. DILLON <strong>AND</strong> ELIZABETH S. DILLON 183 brown coalescent spots. Body beneath reddish-brown, rather thinly fulvous-gray pubescent; metasternum laterally and posteriorly, and each stcrnite Interally, maculate finely with dark brown. Legs Iuscous, thinly covered with fulvous-gray pubes cence. AntenDfLe d.'l.rk reddish-brown, scape black, thinly covered with fulvous-gray pubescence, from third each segment indistinctly gray-annulate on basal one-third, fourth, sixth, and eighth more distillctly so. Head with a median impressed IiIlC from occiput to near epistoma; front COIl cave between Il.ntellnal tubercles, ne.uly smooth, beneath pubescence minutely punc tate; geMc vertical, minutely alutaceous; eye with lower lobe elongatc-ovate, one and one-half times the height of gena; antennal tubercles prominent, robust, at ape. ... produced into n. short, obtuse, robust horn. Pronotum transverse, si des feebly arc uate, slightly narrowed anteriorly, lateral tubercles moderate, with a short, robu;t protess; an apical and a basal transverse sulcus; disk at middle ncar base with a rOlmded, feebly elevated tubercle, the lateral discal ones very indistinct, base finely punctate. Scutellum transverse, sides nearly straight, oblique, apex broadly rounded. Elytra with sides feebly arcuate to apices, which are each slight-ly rounded ; disk at base feebly gibbosc, feebly granulatc, cntircly coarsely, rather densely, deeply punc tate, laterally these punctures form rugosities, at llliddle sparse, then denser apically but not so dense as ba.Mlly; humeri slightly prominent, anterior margin only very feebly oblique, angle with a moderate-sized, elevated tubercle. Proslernum widened behind middle; mcsosiernal process elllarginatc at apex. l'rocoxae prominent, an teriorly with. along, robill!t, blunt uncus which is directed inwardly ; femora clavate, profemora pnrallel-sided on bas:'ll half, then clavate, on bnsal half of anterior and posterior faces fillely rugose. Fifth sternite one-third again as long as fourth, apex feebly emarginatc. Antennae one and two-thirds to one and three-fourths the length of body, fimbriate beneath on four proximal segments; scupe not quite at taining middle of pronotum, robust, elavale, with two or three grooves beneath at base, the first one deeper, rest or surface finely puncbte; third segment llcarly twice as long as first.. LENGTH 18.5 mm.; widtll 7 mm. 'j'ype locality.-Toxpam, Mexico. Distribution.-Central America. GUATEl.ULA: &; no lotality dab; (L. Conradt) ; [A.NB.P.]. Remarks.-Bates in his oribrinal description states that the male has very long frontal horns ; the discI'epaney in tbe above case is probably due to the fact that the type is a much larger specimen. Tybalntia mydas Lucas Dllddere& mydas LucaB, in Castelnau, Anim. 1l0uv. ou rares du L'Arncr. du Snd, 1857, p. 189. Lacordaire, Gen. Col., [x, 1872, p. 679. Apocoptoma /asciatus Lucas, loc. cit., pI. 13, fig. 2. Tybalmia mydos Lucas. AuriviJIius, Cat. Col., pars 74, 1923, p. 341. "Head, which is covered entirely with an olive-brown tomentum, is black, with a fine median impressed line; armed with two very long horns, in thc form of a
184 THE TRIBE ONCIDERINI reeurved spine. Antennae very long, same color as head, last segments somewhat arcuate. Pronotum more or less transversely rugose, gibbose laterally, spiniform tubercle each side very smalL Scutellum broad, truncate behind. Elytra olive· brown, a humeral angles produced, tubcrclcform, entire anterior part rugose and punctate; usually ornamented with rounded brown spots placed here and there. Body beneath olive-brown, and without maculae. Length 28 mm.; width 9 nun. Type locality : Interior Bmzil." The above is a translation of the original description. ISCHIODERES Dillon ang Dillon, gen. nov. Intermediate in many respects between lschiocentra and On· cideres, resembling certain species of the latter genus in maculation and pronotal sculpturing and the former in the pl'ocoxal uncus and the nearly lacking pronotal tubercle. Distinct from all other genera in the proportional length of the antennal segments, the third segment only slightly longer than first, fourth equal to first, and fifth and following slightly longer than fourth, eleventh long. est of all ; the prominent metncoxae; and mesosternum with a dis· tinct tubercle near apex. Elongate--ovate, subcylindrical ; dark reddish·brown to black. Head with eye broadly oblong, more than one and one·half times the height of genll.; front clongate, sides nearly parallel, vcry concave between antenna! tuberclcs; antennal tuberc1es slightly prominent, well separated, shortly dentnte at apex in male. Pronotum tmng· verse, very apex slightly narrower than basc; disk multicarinate transversely; lateral tubercles nearly wanting, feebly e(evnted, without Ii terminal process. Scutellum nearly as long as wide, apex slightly notched at middlc. Elytra clongate, sides sub· parallel to apical quarter, then broadly arcuate, apice.'! together rounded; humeri slighlly prominent, rounded !tnterioriy, 'without any tubercle at !Ingle; disk rather coarsely punctate basally, punctures fine behind middle, distinct to apex. Pro· stcrnum narrow, simple, gradually widened from apex to base; mesosternal process short, longer than wide, apically with a low distinct tubercle; mebstcrnum promi nent, on a different plane from abdomen, the difference abrupt, not gradual. Legs moderate, robust; procoxae moderntely globose, with a slender, long, strongly curved uneus anteriorly ill male; metacoxae prominent ; femora clavatc, profemora subcylindrical and rugosc irregularly in male on all faces except anterior; tarsal claw segment distinctly shorter than remaining segments together. Fifth stemite slightly longer than fourth in male, apex narrowly emarginnte. Antennae rather robust, nearly twice length of body in male; SCflpe in male reaching slightly beyond middle of pronotum, clavate on apical half ; t·hird segment one--eighth longer than first, straight; fourth equal to first, fifth and following very slightly, but measurably, longer than fourth ; eleventh longest of all. GENOTYPE : lschioderes oncideroides Dillon and Dillon, spec. nov.
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READING PUBLIC MUSEUM AND ART GALLE
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THE TRIBE ONCIDERINI (Coleoptera: C
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INTRODuc'rION As known at present,
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Introduction Vll As the shape of th
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Introduction IX In the OncideriniJ
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Introduction 15. Antennae less than
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Introduction Xlll Pronotum not cyli
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Introduction xv 79. Front distinctl
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2 THE T.RlHE ONClDEIUNI middle, the
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4 THE TRIBE ONCIDERINI 3. Elytra to
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G THE TRIBE ONCIDERINI Junin Prov.;
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8 THE TRIBE ONCIDERINI Jamesia phil
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10 THE TRIBE QNOIDERINI procoxae wi
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12 THE TRIBE ONCIDERINI GENOTYPE :
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14 THE TRIBE ONClDERINI broad, or e
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16 l'HE TRIBE ONOIDERINI procoxae w
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18 THE TRIBE ONCIDElllNI BRAZIL: 10
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20 THE TRIBE ONCIDERlNI Elytra with
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22 THE 'l'RIBB ONCIDEl\INI tinctly
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24 THE TRIBE ONCIDERINI basal half;
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26 'l'HE TJllBE ONCIDEBINI Allotype
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28 THE TRIBE ONCIDERINI the bassi t
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30 THE TRIBE ONClDERINI fifth: seap
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32 THE TRIBE ONCIDERINI in markings
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34 THE 'l'IHBE ONCIDERTNI about one
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36 THE TRIBE ONCIDERINI shorter; el
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38 THE TRIBE ONCIDERINI Distinct fr
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40 THE TRIBE ONClDERINI robust, pro
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42 'l'HE TRIBE ONCIDERINI at base r
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44 THE TRIBE QNOIDERINI Hypsioma op
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46 THE TRIBE ONCIDERINI slender, re
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48 THE TRIBE ONCIDERINI straigM, ob
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50 THE TRIBE ONCIDERINI TULCUS Dill
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52 THE TRIBE ONCIDERINI Elongatovat
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54 THE 'L'lUBE ONClDERINI Moderate
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56 THE TRIBE ONClOERINI side, these
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58 THE TRIBE ONCIDERINI Charoides p
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60 THE TRIBE ONCIDERINI ,streaks of
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62 'I'KE THilHi: ONClDERINI indisti
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64 THE TRIBE ONCIDERINl Charoides c
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66 THE TRIBE ONCIDERINI yellow, the
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68 THE TRIBE ONCIDERINI denser; hum
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70 THE TRIBE ONCIDRRINl middle wit.
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72 THE TRIBE ONOIDERINI third punct
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74 THE TRIBE ONCIDERINI Antennae sl
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76 THE TRIBE ONCIDEBINI Charoides p
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78 THE TRIBE ONCIDERINI fulvous is
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80 THE TRIBE ONCIDERINI Pranotum tr
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82 THE TRIBE ONCIDERINI punctures f
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84 THE 'I'RIBE ONCIDERI},."1 tooth
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86 THE TRIBE ONCIDERINI front occas
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88 THE TRIBE ONCIDEBINI Small or mo
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90 THE TRIBE ONCIDERINI impressed l
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92 :rHE TRIBE ONCIDERINl MALE. Elon
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94 THE TlUBE ONCIDERINI punctate, w
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96 THE TRIBE ONCIDERINI ","ithout a
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98 THE TRIBE ONClDERIl.'1 ccnces s
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100 THE TRIBE ONCIDERINI LYDIPTA Th
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102 THE TRIBE ONCIDERINI elytm. Scu
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104 THE TRIBE ONCIDEBINl Type local
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106 THE TRIBE ONClDERINI Elytra wit
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108 THE TRIBE ONCIDEBINI callosity
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110 THE TRIBE ONClDERINI half; prot
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112 THE TRIBE ONCIDERINI BRAZIL: !j
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114 THB TRIBE ONClDERINI Lampedu!lo
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116 THE TRIBE ONCIDERINI nearly cyl
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118 'l"HE 'XRIBE ONCIDERINI nearly
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120 THE TRIBE ONCIDERINI procoxae s
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122 l'B!:: TRI:BE ONClDERIl),"l Sma
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124 THE TRIBE ONCIDERINI FEMALE. El
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126 'l'HE TRIBE ONClDERINI Moderate
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128 THE TRIBE ONCIDERINr Type local
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130 THE TRIBE ONCIDEnINl Distinguis
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