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44 THE TRIBE QNOIDERINI
Hypsioma opalina Dillon and Dillon, spec. nov.
PLATE III, FIGURE 2.
From H. cha,rila, this species can be separated as follows : ely­
tra more attenuate apically, disk at base more coarsely punctate,
humeral anterior margin neady straight, angle with tubercle ob­
tusely rounded j front very feebly narrowed between eyes ; and
surface color of elytra olive brown.
FEMALE. Elongate-ovate, rather robust, subcylindrical, ciytra convex; head
and pronotum fUECOUS or piceous; eiytra dull olive-brown. Head and pronotum
pale gray pubescent, varied with fulvous. Scutellum fulvous pubescent, with
lateral edges narrowly gray. Elytm thinly fulvous pubescent, with numerous,
small, irregular patches of pale gray, the fulvous pubescence forming a. rather
indistinct, oblique fascia ncar middle. Beneath dark reddish-brown, rather thinly
clothed with yellowish-white pubescence, which is interspersed with numerous small,
irregular, glabrous spaces; metasternum with faint touches of fulvous; abdomen
medi[llly with a broad glabrous vitta, each side of which is a very narrow
whitish vitta. Leg3 dark reddish-brown, thinly clothed with yellowish-white; claw
segment entirely dark brown, thinly gray pubescent on basal two-thirds. Antennae
dark reddish-brown; basal two-thirds of scape and third and basal half of remain­
ing segments, yellowish-gray pube:cent, remaining third oj scape and third segment
ancl half of other segments, dark brown pubescent.
Head above finely, densely punctate, with median impressed line from occiput
to near epistoma; front and genae minutely alutaceous; gena. with large, scattered
and very w'allow punctures, much elongate, pubescent; eyes with lower lobe
elongate-ovate, three-fourths height of gena ; antennal tubercles well separated, not
produced at apex but prominent. Pronotum transverse; base wider than apex;
sides straight, unarmed; with an :l.pic.'ll and basal sulcus; disk with three tubercles,
median one just slightly behind middle, very small, round, one either side broad,
elongate and more elevated than meciian; base with a few small granules. Scutellum
transverse; sides straight, oblique; apex arcuate, notched medially. Elytra with
sides nearly straight, somewhat tapering apically; apices each rounded; each with
a longitudinal, rather well elevated, feebly arcuate, granulate-punctate gibbosity,
remainder of surface of basal fourth granulate-punctate, thence with coafse, sparse
punctures, these becoming smaller apically; humeri projecting, anterior margin
strongly oblique, only feebly arcuate, and forming a broad angle with the hind
margin, on whieh is a yery obtuse tubercle. Prosternum not widened behind
middle; fifth sternite about twice length of fourth, at apex nearly straight, broadly,
shallowly, triangularly impressed. Procoxae globose, not tubercled; profemora only
Yery gradually widened apically, remaining femora more suddenly clavate. Antennae
about .'IS long as body, fimbriate moderately on first to fifth segments;, scape slender,
capitate apically, not quite reaching to middle of pronotum; third segment slender,
sinuat.e, one-fifth longer than scape; remaining segments gradunlly shorter.
LENGTH 15 mm.; width 7 mnl.
Holotype.-Female ; Rio de Janeiro, Brazil; [M.C.Z.].
Paratype.-Female; Brazil; [M.C.Z.].