ARRHENOPLITA. 179 
9. Arrhenoplita picea. 
Oplocephala picea, Lap. & Brullé, Ann. Sciences Nat. xxiii. p. 3447. 
Hab. Guatemata, San Gerénimo (Champion).—Cotomsta 1, Cartagena (coll. F. Bates). 
Examples of both sexes were captured at San Gerénimo. The head in the male of 
this species is armed with two short, very stout horns, and the epistoma with a distinct 
conical tubercle in the middle; the latter character is not mentioned by the describer, 
Our insect agrees perfectly with a male example, from Cartagena, contained in Mr, F. 
Bates’s collection. . | 
10. Arrhenoplita nigricornis. 
Elongate ovate, moderately convex, reddish brown, shining. Head transversely excavate anteriorly, coarsely 
but not closely punctured, the epistoma swollen and sharply defined; antennee with the eight outer joints 
widened, the three basal joints red, the extreme apex of the last joint ferruginous, the rest deep black ; 
prothorax transverse, widest about the middle, feebly rounded at the sides, the base and apex bisinuate, 
the anterior angles rounded, the surface rather coarsely but not very closely punctured; scutellum scuti- 
form ; elytra long, distinctly broader than the prothorax, with rows of very coarse, deep, not very closely 
placed punctures, the interstices very finely and distantly punctured, of a clearer and more uniform colour 
than the head and prothorax ; legs and palpi light ferruginous. 
Length 43 millim. ( 9.) | 
Hab. Guatemata, San Gerénimo (Champion). 
The elytra in this small species are comparatively long, distinctly broader than the 
thorax, and with rows of very coarse punctures; in the single individual before me 
they are broadly compressed on each side before the middle, which, however, is probably 
due to accidental circumstances. A. nigricornis is not nearly allied to any known 
species, though perhaps nearest to A. picea. 
** Elytra confusedly punctured. 
11. Arrhenoplita inermis. 
Oblong ovate, strongly convex, castaneous, finely pubescent, shining. Head rather coarsely and closely 
punctured, transversely excavate anteriorly, the intraocular space slightly raised and swollen on each 
side just within the eye; antenne with the seven outer joints widened, the fourth joint a little wider 
than the third; prothorax transverse, widest about the middle, the apex almost straight, the anterior 
angles obtuse, the base bisinuate, the surface punctured like the head; scutellum triangular; elytra the 
width of and a little rougher than the prothorax, closely, confusedly, and somewhat coarsely punctured, 
with indications of numerous fine transverse wrinkles; legs, antennz, and palpi testaceous; beneath 
shining, very closely and confusedly punctured and wrinkled. 
Length 2? millim. 
Hab. Guatema.a, Zapote (Champion). 
Six examples. This is one of several small Central-American species allied to 
A. bituberculata, Oliv. (an insect described upon examples supposed, according to 
Chevrolat, to have been introduced in an exotic boletus into France, and possibly of 
2 AA 2 
