READING PUBLIC MUSEUM AND ART GALLERY

102 THE TRIBE ONCIDERINI
elytm. Scutellum thinly yellow-gr:l.y pubescent, this pubescence condensed laterally
to form a rather indistinct vitta each side. Elytra dnrk grayish·brown pubescent,
each with nn indistinct arcuate vitta of gray or yellow-gray pubescence from be­
neath humeri touching suturo just behind middle, then continuing to lateral position
nt apex, remainder of surface with minute, scattered patches of same color. Be­
DM.th thinly yellowish-gray pubescent, with many SC.'lttered, glabrous patches, sterna
usually gray medially, later:llly with indistinct touches of dark brown; abdomen
with each sternite laterally having a small, elongate, yellowish macula, which de­
crc!lSC in sire to apex . Legs piceous, thinly gray or yellow-gray puent, and
with minute glabrous areas IlS in the undersurface. Antennae dark brown or piceous,
thinly gra.y or yellow·gray pubescent, more or less mottled with small, indistinct,
rounded patches of brownish, apices slightly darkel".
Head above minutely alutaceous, with a median impressed line from occiput to
near epistoma on front; front elongate, narrow, widened slightly below lower lobe
of eyes, surface minutely nlutaccous; genae elongate, narrow, surface slightly pubes.
cent, minutely aiutaceous and with a few scattered, coarse punctureil; cye with
lower lobe narrow, eiongate-oblong, ncarly two and one-half times genal height;
antennal tubercles distant, moderately prominent, at :\pex with a short, robust
horn wbich is erect or slightly curved posteriorly. Pronotum transverse, sides
strnight, not armed; base half again as wide as apex; a.pical sulcus interrupted
medially. basal one subfovcate either side of middle and laterally oblique to middle;
disk at middle just before basal sulcus with a. rather elongate tubercle and either
side of middle more apical a very broad tumescence, InteraUy at base with a few
setigerous punctate grnnulcs. Scutcllwn transverse; sides straight, oblique; apex
broadly rouuded, sometimes nearly subtruncate, feebly notched medially. Elytra '
with sides almost straight, feebly attenuate apically; apices separately, broadly
rounded; each ely troll with a broad, feebly elevated, more or less arcuate gibbosity
at base; basal quarter moderately punctate with coar5e, deep pUllcture, whi ch bc
come finer and sparser to middle, thence to apex nearly obsolete; humeri prominent,
anterior margin arcuate, no tubercle at posterior angle but there is a short carina
extending from the angle to basal third laterally. Prosternum widened behind
middle; mesosternum cmarginate medially. Fifth sternite nearly onc and one-half
times length of fourth, cm(lrginate at a.pex. Legs robust; procoxae globose, very
feebly, obtusely tubercled; profemora robust, more gradually clavate than others,
feebly rugose on basal third on dorsal and ventral surfaces ; metatibiae widened ap-­
ically; protarsi slightly dilated. Antennae about one-third longer than body ; scape
very gradually clavate, reaehing nnly to apical third of prollotum, with several
grooves internally and externally on basal third, remainder of surface finely, densely
punctate; third segment slender, feebly sinllate, about one-half again as long as
scapc; fimbriate nearly entire length, Jess hcavily so on last several segments.
FEMALE. Slightly more robust; prosternwn much widened behind middle of
procoxaei fifth sternitc at apex sub·truncate, feebly triangu1arly impressed at
middle; legs less robust. proremora more abruptly clavate, Illclafemora not widened
apically; antennae as long or only slightly longer than body; seRpe not grooved
basally.
LENGTH 12 mm.; width 3·4.5 mm.
Type locaUty.-Rio de Janeiro, Brazil.