READING PUBLIC MUSEUM AND ART GALLERY

46 THE TRIBE ONCIDERINI
slender, reaching almost to middle of pronotmn, nearly capitate apically, finely,
densely punctate; third segment one-third longer than first, sinuate; remaining
oncs gradually shorter.
LENGTH 14-16 mm.; width 5.5-7 mm.
Holotype.-Femalc; Brazil; [M.C.Z.].
Pamtypes.-2 females ; Brazil. Female; Rio de Janeiro; [all
M.C.Z.].
Hypsiomu hczia Dillon and Dillon, spec. nov.
PLATE III, FIGURE 4.
Closest to H. opal-ina, but elytra with basal gibbosity small,
not elongate, straight ; humeri more projecting, with a prominent
tubercle j eyes with lower lobes oblong-ovate j first abdominal ster­
nite gray pubescent on entire basal half; and pronotum with latenI
diseal tubercles not well defined nor separated .
:MALE. Elong.'lte-ovatc, rnther slender, subcylindrical, clytra subconvex; black,
gmyish-brown pubescent. Head and pronotum irregularly varied with pale gray
or whitish pubescence. Scutellum broadly margined laterally with gray. Elytra
with basal third only slightly varied with gray or whitish pubescence, remaining
two-thirds irregularly streaked with ashy. Beneath [uscous, with tawny-white
pubescence, this fanning a broad lateral vitta either side of abdomen from apical
half of third scgmcnt, broadly ghbrous medially; sides of mesosternum and metc­
pistcrna anteriorly grnyish-brown pubescent. Legs black or fuscous, tawny-white
pubescent, slightly variegated with grayish-brown; base of tarBal claw segment
pale gray pubescent. Antennae fuscous or piceous; scape thinly gray pubescent.,
apically brown; third segment on basal half gray, apically brown, remaining seg­
ments with basal third gray, apical two-tllirds brown.
Head above finely, densely punctate, a median impressed line from occiput to
near epistoma; front with sidcs lIearly parallel, finely, delLcely punctate; antennal
tubercles subapproximatc, prominent, produced at apex into a short, erect, subacute
process; genae elongate, alutaceous, feebly pubescent ; eyes with lower lobe oblong­
ovate, about two-thirds genal height. Pronotum transverse; sides nearly straight,
oblique, base wider than apex; with a basal and apical sulcus, the basal one oblique
laterally; disk at middle with narrow, longitudinal tubercle, either side with a
moderately elevated, rounded. tubercle. Scutellum transverse; sides nearly straight,
oblique; apex subtruncate, fully notched at middle. Elytra with sides nearly
straight., somewhat attenuate api(mlly, apices each rounded; base near scutellum
with a feebly elongate gibbosity each side, between which are a few granules, the
remaining portion is deeply, coarsely punctate; remainder of elytra co.usciy,
moderately punctate, the punctures becoming only slightly smaller apically, but
still retaining their depth; humeri strongly projecting, very oblique, forming n
sharp angle with the posterior lIlargin, the angle bearing a large rounded tubercle,
thc dorsal surface of the anglc having a large, shallow impression. Prosternnm
moderately narrow, widening only very slightly after middle of procoxae. Pro-