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LAWRENCE S. DILLON AND ELIZABETH S. DILLON 25
flecked with white, each segment beginning with third irregularly and narrowly
annulate with white.
Head above minutely aiutacoou!, with n median impressed line from occiput
to epist.oma; front feebly concave between antennal tubercles, minutely, densely
alutaceous and fincly, sparsely vunctate; genae vcrtic:)l, minutely alutaceous, with
a few various-sized punctures scattered over the surface; eye with lower lobe
ovate, not quite equal to height of gena j antennal tubereles feebly prominent,
robust, apex with an inconspicuous, obtuse tooth. Pronotum strongly trallsverse;
sides nearly straight, grudually tapering to apex, unarmed; apical and basal
transverse sulci deep but narrow, the latter broadly arcuate, coalescent with the
broader, lateral, oblique sulci ; disk finely, very sparsely punctate near middle
of basal half, median line distinctly elevated, usually only on hasal half, each
side broadly tumid, tumescence trnversed by an oblique impressed line which
divides each inlo two distinct tubercles. Scutellum transverse; sides oblique ; apex
broadly arcuate, slightly notched at middle. Elytra. with sides nearly stmight,
distinctly tapering to apices, each of which is rather narrowly rounded ; baal
gibbosity strongly elevated, elongatc, nnrrow, fltudr.led with single or double
row of coarse granules which attains anterior IIUlrgin of clyron, disk between
gibbosity and suture with at least one irre!,'1.ilar row (usually scattered ones or
another series) of finer granules or grnnuiate--punct.ures which gradually become
fine punctures before passing posterior portion of gibbosity, beLween this and
hwncrus finely and sparsely punctll, with a few fine granules, punctures fine
after basal two-fifths; each disk wit.h about four costae, more distinct Oll apicnl
portion; humeri strongly prominent, anterior margin feebly arcuate, slightly
oblique, angle obtuse, with a feebly elevated, rounded tubercle, tbis continues as
a short, shining carina which is directed posteriorly (but slightly diagonally so)
and is shorter than, or equal to, the anterior margin of humerus in length j sides
fincly and rather densely puncbte. Prosternum simple. Proeoxae slightly tumid
posteriorly, anteriorly with a distinct, stout uncus; profcmor:t robust, sub­
cylindrical, slightly narrowed dist.I!lly and b:lsally, rather finely rllose beneath,
mcsofcmora strongly clavate, met.:l.fcmora more slender tlnd feebly clavate; meta­
tibiae gradually, but not greatly, expanded apieally. Fifth sternite half again
as long as fourth, apex broadly relure. Antennae with eighth segment att.aining
elytrnl apex, finely fimbriate benenth on five proximal segments, rcst very sparsely
so; scnpe rather robust, st.rongly clavate beyond middle, basal half (except above)
coarsely rugose; third segment distincUy longer th .. m first, moderately bisinuate;
next two gradually shorter, rest· subcqual; eleventh with a CllTved process at apex.
FEMALE. More robust in body form; antenna! tubercles more feebly elevated,
"ery shortly armed; procoxae broadly and feebly tuberculate anteriorly; profemora.
similar to mesofemor:l, not rugo:;;e beneath j metatibiae ulUllodified; fifth sternite
about twice length of fourth, apex broadly reunded, with a median impressed line
and nenr apex :\ 1!emicircuiar, broad impression, the surfacc of which is finely and
densely punctate; antennae about as long as body, scape less robust, smooth, Dot
rugose, segments gradually shorter from third.
LENGTH ll-13.5 mm.; width 5-6 mm.
Holotype.-"Male j San Bernardino, ParaguaY j (K. Fiebrig) ;
rU.S.N.M. number 57220].