344 MEMOIRS ON THE COLEOPTERA 



*Colobothea sexualis n. sp. Rather stout, convex, dark red-brown in 

 color, the maculation luteo-cinereous; head with two narrow pale vittae; 

 antennae about two-thirds longer than the body in both sexes, piceous, 

 the joints slightly cinereous toward their bases; prothorax a fifth (cf ) 

 to two-fifths ( 9 ) wider than long, feebly swollen at the sides subbasally, 

 convex, with two approximate subentire pale vittae transversely con- 

 nected at base and, outside of these, two fine streaks just above the 

 flanks and one at outer fourth near the apex; elytra cuneiform, convex, 

 finely, sparsely punctate, each puncture bearing a short stiff erect black 

 seta, the pale spots comminuted and in somewhat lineal arrangement in 

 about basal third, a large subquadrate and sometimes disintegrated discal 

 spot about the middle, and a few small spots near the apex; carina above 

 the flanks rather obtuse, subduplex. Male with the fifth ventral abruptly 

 upwardly declivous apically, the apex produced medially in a long slender 

 spiniform process, bending downward slightly apically, and, at each side of 

 the line of flexure, a long compressed thin process, projecting posteriorly 

 almost as far as the central process. Female with the last dorsal segment 

 flat, one-half longer than wide behind the elytra, the sides converging, then 

 parallel to the truncate apex, which has several long hairs and, at each 

 side, two long stiff spiniform setae, the side margins finely cariniform; the 

 fifth ventral is triangular, with narrow emarginate apex and somewhat 

 sinuate sides. Length (cf 9 ) 11.2 mm.; width 4.0-4.2 mm. Honduras. 



Allied to ramosa, guatemalina and parcens of Bates, but differs in 

 the sexual characters as inferable from the descriptions. 



*Colobothea pleuralis n. sp. General facies as in the preceding, black, 

 densely clothed with minute blackish-brown vestiture and yellowish- 

 white spots; head with two pale vittae; antennae three-fourths longer than 

 the body, nearly as in the preceding; prothorax nearly a fourth wider 

 than long, swollen subbasally, more narrowed thence to the apex than 

 in sexualis, convex, having two entire pale approximate medial vittae, 

 which are transversely united throughout basal half, also a sublateral 

 narrow vitta, slightly interrupted medially and not attaining base or 

 apex; elytra finely, sparsely punctate and setulose as in sexualis, cunei- 

 form, the flanks flat, polished, defined above by a very acute prominent 

 carina, the disk with the pale maculation disposed almost exactly as in 

 sexualis but with the spots rather less numerous. Male with the fifth 

 ventral plate transverse, abruptly flexed upward medially, the upturned 

 part flat, triangular, concave medially, with its narrow setose apex 

 narrowly emarginate, the emargination filled by two minute short styli- 

 form processes, each bearing a long porrect brush of hairs at apex. 

 Length (cf) 10.7 mm.; width 3.8 mm. Panama (Darien). 



The acute angle limiting the transverse truncature of the elytral 

 apices externally is much longer and more spiniform here than in 

 sexualis, and the form of the fifth ventral plate in the male is com- 

 pletely different, remarkably so for two species which resemble 

 each other so closely to superficial view. 



