DIAPERIDiE. 235 



DESCRIPTION. 



Body long, rather widest towards the anus, black, minutely punctured, naked, not glossy. Head 

 somewhat quadrangular, longer than in the preceding species, uneven : prothorax nearly square with 

 a minute impression above the scutellum ; posterior margin wavy ; lateral very slender and a little 

 rounded : scutellum subtriangular : elytra with nine rows, including the marginal one, of punctures, 

 and an abbreviated one at the base next the suture ; under a powerful lens the interstices are minutely 

 but not thickly punctured : the shoulders are scarcely thicker than the thighs. 



ii. Taxicornia. Lat. 



Family DIAPERIDtE. Diaperidans. 



CXXVI. Genus DIAPERIS. Geoff. 



xxvii. * Subgenus Arrhenoplita. Kirb. 



Head of the male armed with horns. 



Diaperis hcsmorrhoidalis Payk. may be considered as the type of this subgenus, 

 which differs from the legitimate Diaperides in being less convex and having the 

 head of the male armed with two or more horns. 



(320) 1. * Diaperis (Arrhenoplita) bicornis. Two-horned D. Arrhenoplita. 



Diaperis bicornis. Oliv. Ent. iii, 55, 6, 4, t. i, /. 4. 



Hispa bicornis. Fab. Gen. Ins. Mant. 215,3,4; Mant. Ins. i, 47,4. Linn. Syst. Nat. Gmel. 1734, 18. 



Length of the body { Jf^ ^ } lines. 



Several taken in the Route from New York to Cumberland-house. 



DESCRIPTION. 



Body punctured, glossy ; underneath black, above black-bronzed or green-bronzed. Head of the 

 female transversely impressed between the eyes, unarmed; in the male just behind the eyes is a pair 

 of long cylindrical vertical piceous horns rather paler at the apex, between which is a deep excava- 

 tion ; the nose also at the apex is armed with a pair of minute triangular teeth ; mouth, in both 

 sexes, rufous ; antennas black with the three first joints attenuated and rufous : prothorax transverse 

 with the sides rounded, posteriorly obtusangular but not lobed : scutellum triangular : elytra slightly 

 furrowed with the furrows punctured ; interstices minutely punctured : anus underneath with two 

 transverse obtuse ridges : legs rufous. 



2 H 2 



