OTHRYONEUS. 245 
Numerous examples. This species is allied to C. cruentatum, Chevr., and C. lineatum, 
Perty, from Cayenne ; it will easily be known by red alternate interstices of the elytra. 
We figure an example from Bugaba. 
OTHRYONEUS*. 
Mentum trapezoidal; last joint of the labial palpi ovate, truncate at the apex, that of the maxillary pair 
moderately broad, subsecuriform ; mandibles cleft at the apex; ligula strongly exserted; head short, 
deeply sunk into the prothorax, the epistoma very short, not very clearly defined, broadly truncate in 
front, and separated from the prominent labrum by a membranous clypeus, the antennary orbits slightly 
swollen and projecting a little beyond the epistoma in front; eyes small, transverse, convex, widely 
separated; antenne short, not reaching the base of the prothorax, the seven outer joints broader, the 
sixth to the tenth transverse, the eleventh longer than the tenth and rounded at the apex; prothorax 
transverse, very strongly margined, the margins reflexed, the apex broadly arcuate emarginate, the base 
strongly bisinuate; scutellum large, scutiform ; elytra closely embracing, and wider than, the prothorax, 
long, subparallel, with regular rows of fine punctures, narrowly margined; legs rather short, finely 
punctured, the tibie slender; basal joint of the posterior tarsi very short, equal to the two following 
joints united, about half the length of the apical one; tibial spurs short, but distinct on all the legs; 
prosternum horizontal, grooved on each side, the apex produced ; mesosternum narrowly raised, V-shaped, 
and deeply concave within in O. maculipennis, concave in O. erotyloides; metasternum long; intercoxal 
process rather broad, rounded in front; epipleure extending to the apex of the elytra; form oblong ovate 
or elongate ovate, subparallel ; body glabrous, winged. 
This genus includes two species, one from Colombia and one from Nicaragua. 
In Othryoneus the head is formed much as in Cyrtosoma; amongst its allies the genus 
will be known by its elongate shape, the strongly margined broad thorax, the complete 
epipleur, the short but distinct tibial spurs, the comparatively narrow apical joint of 
both the maxillary and labial palpi, the cleft mandibles, the very lightly punctate- 
striate elytra, &c. The two species somewhat resemble Erotylide, and indeed have 
the elytra maculated as in various Tropical-American species of that family inhabiting 
the same region ; both are unique. Jam unable to detect any external sexual characters ; 
possibly both the specimens are females. An allied undescribed South-American genus 
is contained in Mr. F. Bates’s and in the British Museum collection. 
* The species described below as O. maculipennis stands in Mr. F. Bates’s collection under a MS. generic 
name which I would adopt were it not already in use. 
t Othryoneus maculipennis. 
Shorter and less parallel than O. erotyloides ; the antennz shorter, with the penultimate joints more transverse, 
wholly black; the head with a deep transverse impression on each side in front ; the prothorax rounded 
at the sides before the middle, narrowing anteriorly, the sides straight from the middle to the base, black ; 
the scutellum black ; the elytra shorter and broader and less parallel than in 0. erotyloides, the apex 
broadly rounded, the rows of punctures more shallowly impressed, the punctures placed closer together, 
the interstices exceedingly finely and sparingly punctured, testaceous, the base in the middle (whence a 
short oblique streak extends a little way down each elytron), the suture, two large irregular spots (one 
near the suture, the other near the lateral margins) on each side before the middle, a zigzag band a little 
beyond the middle (not reaching the suture or lateral margin), and the apical third, black ; beneath and 
the legs black.—Length 123 millim.— Hab, Cotoms1a, Bogota. A single example in Mr. F. Bates’s collection. 
