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148 THE TRIBE .ONCIDERINI
then arcuately expanded to near apex, where it is strongly na.rrowed so that apical
margin is not quite so wide as basal margin, lateral tubercles wanting; apical tmnsverse
sulcus entirely obsolete and apex without beading, bnsai transverse sulcus
deep, trisinuOU3, on each side two distinct sulci, ODe in position of usual lateral
oblique sulcus, nearly, but not quite extending onto disk, the other extending the
basal sulcus but not connected to it; disk at center tumid, bearing three tubercles
there, a low elongate median one, and one each side anteriorly, oval, more prominent,
lateral to the tumescence is an elongate, low, strongly oblique tubercle each side.
Scutellum nearly as long as wide; sides straight, oblique; apex narrow, truncate.
Elytra with sides nearly parallel, apices separately rounded ; oosal gibbosity rather
elongate, oval, prominent, covered fairly densely with coarse punctures, each of
which anteriorly bears a transverse granule, more pronounced near base; disk
rather coarsely punctate, punctures gradually more sparse to middle, thence to
apex denser and obsolete; humeri projecting, anterior margin feebly arcuate, slightly
oblique, angle with a strong, transverse tubercle, prolonged beneath into a short,
obique l carina. and above by a series of transverse rugosities. Prostcrnum simple,
narrow, nearly parallelsided, at base strongly expanded ; mesosternal process wide,
gradually e:panded basally, apex bilobedly emarginate. Procoxae globose, anteri
orly with a broad, feeble tubercle; femora rather slender, clavate, profemora not
rugo..."C. Fifth sternite nearly twice length of fourth, a large, triangular flattened
area apically, apex feebly arcuate. Antennae one and onefourth times as long as
body, eighth segment surpassing eiytral apex, very sparsely fimbriate beneath on
third and fourth segments ; scape slender, slightly clavate on apical hnlf, not rugose
at base; third segment about one-fifth longer than first, robust, feebly sinuous,
fourth nnd fifth ' equnl to scape, rest slightly shorter, subequal.
LFlNGTH 13 mm.; width 5 tnm.
Holotype.-Female ; Santarem, Brazil i [C.M.].
HESYCHOTYPA Thomson
He8Ychotypa Thomson, Pbysis, n, 1868, p. 53. Lacorda.ire, Gen. Col., IX, 1872,
p. 667, 672.
The chief distinguishing characteristics of the genus are as
follows : the cJytra simply punctate, not granulate at base; antennae
with third segment much longer than scape, moderately sin
nate, scape short, robust, clavate; mesosternal process angulate
each side, apex emarginate j humeri only sligl1tly prominent, an
terior margin strongly arcnate j head and pronotum always with
alternate dark and pale vittae.
Elongat.e-ovate, robust; dark reddishbrown to black, tlSUllIly with a median or
post-median fascia on elytra, which are often more or less covered with strigiform
pubescent markings. Head with eye very variable in size and shape; front broad,
only slightly higher than wide, parnllelsided or slightly narrowed below eyes; Rn
tennal tubercles slightly prominent, widely separated, in male usually with a short
horn, in female only slightly produced. Pronotum rather strongly transverse, apcx