READING PUBLIC MUSEUM AND ART GALLERY

48 THE TRIBE ONCIDERINI
straigM, oblique; with a basal und apical sulcus, bnsal one oblique laterally ; disk
at middle with a very feebly elevated, elongate tubercle, which is nearer base,
either Bide of which halfway between base and apex is a rounded, moderately
elevated tubercle, basal half of disk with a few large punctures. Scutellum trans­
verse; sides nearly straight, oblique; apex 8ubtruncate, feebly notched at middle.
Elytrn. with aides straight to apices, somewhat attenuate; apices separately
rounded; base of each clytron neal' scut.ellum with an elongate, rather narrow
gibbosity; basal fourth of disk with a few punctate-granules, from there with
coarse, deep punctures which become finer and evanescent apically; humeri very
projecting, anterior margin oblique, forming a rather acute angle with posterior
margin, :lngle with a large, rounded tubercle. Prostemum widened at middle of
proeoxlle; fifth sternitc about one-half longer than fourth, at· apex very feebly
emargillilte. j>rocoxae globose, anteriorly wilh a short, deeply curved uncus;
proIemora from basal IourtIl nearly parallel, rather feebly, transversely rugose
dorsally and ventrally, remllining femora gradually clavate; metAtibiae much
widened on apical half; proL'lrsi strongly dilated. Antennae (oruy to eighth
segment present) with eighth segment reaching to tip of elytra; seapc nearly
CiLpitate, reaching just to middle of pronotum, with from four to six grooves
beneath on baS!li iHlif, rem.inder of surface finely densely punctate; third segment
silluate, one-third longer than seape, remaining segments very gradually shorter;
fimbriate on first and third, slightly on fourth segments.
FEMALE . . More robust; eyes slightly smaller, about one-third less than gem.!
length; procox,1e prominent but without uncus; fifth sternite about two-thirds
again as long as fourth, at ape." subtruncate, bro.'l.dly, shallowly, triangularly
impressed; antennae as long as body, fimbriate through fifth segment; scape more
slender, very feebly rugose baS!l.l1y.
LEKCTH 14.5-15-5 nun.; width 0.5-7.5 mill.
HolotYl)e.-Male; BI'azil j [A.M.N.H.].
Allotype.-Femalcj Espil"ito Santo, eastern Brazil j [A.N.S.P.].
Hypsioma affinia Thomson
PLATE III, FrCURE 6.
llypsioma affinis Thomson, Class Ceramb., 1860, p. 117.
Completely different from all the preceding members of this
gronp except H. ino·rna.!a in Imving the abdomen thinly guy 01'
grayish-green pubescent on its entire lower surface. From that
specios it can be distinguished by olytra hnving the bllsal gibbosi­
ties elongate, broad, feebJy elevated and feebly granulated (not
short, strongly elevated, and with a single row of coarse granules
as in inornata) ; llumcl'i less projecting; pronotal lateral disea!
tubercles confused j and clytra with surface coloration dnll red­
di);11bro'm 01' fuscous, not olive.