304 A NEW GENUS AND SPECIES OF BLATTELLITES 



ulnar vein with numerous complete branches; intercalated triangle 

 small but distinct. Dorsal surface of male abdomen specialized. 

 Subgenital plate of male fusing and specialized with styles. 

 Subgenital plate of female short, showing a very brief medio- 

 longitudinal distal cleft. Cephalic femora with ventro-cephalic 

 margin armed with (four to six) long, stout spines, succeeded dis- 

 tad by a row of minute, well-spaced, piliform spines, terminating 

 in three spines, heavy and elongate in increasing ratio distad. 

 Ventro-caudal margin of cephalic femora armed with (four and 

 one distal) long, stout spines. Other ventral femoral margins well 

 supplied with spines, which, for the Group, are long and stout, 

 though not as heavy as those usually found in the species of the 

 Group Ischnopterites. First three tarsal joints supplied distad 

 with small pul villi, brief ventral surface of fourth joint occupied 

 by a pulvillus. Tarsal claws asymmetrical, simple; cephalic 

 claw of each pair about half as large as the corresponding caudal 

 claw, its apex extending only slightly beyond the large arolium. 



Antitheton iniquiungues new species 



Compared with Platylestes colomhiae Hebard, with which spe- 

 cies alone any similarity, of even a superficial nature, is shown, 

 the present insect is found to differ in the smaller head, shorter, 

 much more transverse and elliptical pronotum, fully developed 

 tegmina and wings, showing only very slight reduction in the 

 female sex, richer coloration, more slender cerci, important 

 features in venation and male primary and secondary sexual 

 features, and in the remarkably asymmetrical tarsal claws. 



Type. — cf ; Cacao, Trece Aguas, Alta Vera Paz, Guatemala. 

 Altitude, about 900 feet. April 19, 1906. (Barber and Schwarz.) 

 [United States National Museum.] 



Size rather large for the Group, form very broad. Head with interocular space 

 half that between antennal sockets; inter-ocular-ocellar area flattened, feebly 

 concave; large ocellar spots present; slightly smaller circular areas, with sur- 

 faces feebly convex, occur meso-ventrad of and adjacent to the antennal sock- 

 ets. Maxillary palpi with distal joint large, very slightly shorter than preced- 

 ing joint, which joint is distinctly shorter than third joint. Face and two 

 distal joints of maxillary palpi well supplied with moderately elongate, coppery 

 hairs. Pronotum strongly transverse; surface very weakly and evenlj' convex 

 except toward caudal margin, where it is narrowly more strongly convex 

 declivent; transparent lateral portions very weakly declivent, distinctly less 

 so than in Platylestes colomhiae; cephalic margin broadly convex, caudal margin 



