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LA\VItENCE S. DILLON AND ELIZABETH S. DILLON 51
pubescent. Antennae piceous, basal quarter of fourth segment yellowish, following
segments with yellowish port,ion gradually increasing; scape and basal half of third
segment yellowish-gray pubescent ; scape with 1\ large, irregular, brownish­
ochraceous macula at apex.
Head above finely alutaceous, with a median impressed line from occiput to
epistoma; front elongate, sides oblique, widest at epistorna, surface finely alutaceous ;
genae oblong, finely alutaceous, with a few coarse punctures scattered over surface;
eye with lower lobe broadly oblong-ovate, one-half longer than gena ; antennal
!ubcreles prominent, well separated, at apex with a short, very robust tooth. Pro­
notum transverse; sidCl:l very feebly arcuate, unarmed, apex distinctly narrower
than base; apical sulcus deeply cun-ed medially, basal sulcus oblique laterally;
disk tri-tuberculate, median tubercle just behind middle, feebly elongate and
elevated, one either side more apical, broad and feebly elevated; base of disk with
scattered, coarse punctures. Scutellum transverse ; sides straight, oblique; apex
truncate, deeply notched medially. Elytra. widening very slightly before middle,
thence rounded to apices, which are separately rounded, basal half with sparse,
moderate punctures, thee obsolete and mueh smaller on remainder of surface;
each elytron at base with :l broad, feebly elevated, arcuate gibbosity; humeri
prominent, anterior margin only slightly arcuate, at angle with :m obtuse tubercle.
Prosternum widened behind middle of procoxae ; mesosiernal process broadly,
deeply, bilobedly emarginate; fifth sternite half longer than fourth, at apex sub­
truncate or very broadly rounded. Procoxae globose, internally strongly uncate;
profemora robust, sides nearly parallel to middle, then clavate to apex, basal half
of dOMI and ventral surfaces transversely rugo.s:e; remaining femora less robust
but more gradually clavate; met:J.tibiae much dilated on apical half ; protarsi dilated.
Antennae about one-third longer than body; scape robust, reaching nearly to middle
of pronotum, capitate apically; on basal half internally and externally with a
nwnber of deep grooves, remainder of surface finely, densely punctate ; third seg­
ment very slightly longer than seape, moderately sinuate.
LENGTH 16 mm.; width 6.5 mm.
Type locality.-Amazon l·egion.
Distrib-ution.-Amazon region of Brazil.
BRAZIL: d; Amazon ; [M.C.Z.].
TRITANIA Dillon and Dillon, gen, nov.
Front elongate, narrow, slightly widened below eyes; eye with
lower lobe broadly oblong-ovate, large, slightly taller tban gena ;
antennal tubercles subcontiguous ; pronotum conical; elytra
sparsely granulate-punctate at base, basal gibbosities moderately
elevated; procoxae with a short, robust uncus in male; antennae
elongate, one and two-thirds times hody lengtb in male, scape
ratber robust, gradually clavate from base, attaining middle of
pronotum, third segment more tban one-third again as long as first,
sligbtly sinuous.