MORGAN HEBARD 109 



The nearest relationship is clearly with the genus Eurycotis: 

 the most important features of difference being the absence of 

 tegmina; less flattened structure, with dorsal surface consequently 

 more convex, and more elongate and slender tarsal joints, with 

 metatarsi longer than the combined length of the succeeding 

 joints. The greater general body convexity shows agreement 

 with the genus Pelmatosilpha . 



Genotype. — Lamproblatta albipalpus new species. 



Description of Genus. — Form less deplanate than in Eurycotis, 

 entire dorsal surface and ventral surface of abdomen rather 

 decidedly convex. Head evenly rounded, eyes widely separated 

 and not projecting; maxillary palpi rather short. Pronotum with 

 surface evenly convex; margin evenly convex, this strongest 

 cephalad, to the transverse caudal margin. Mesonotum and 

 metanotum with surface transversety convex, this less decided 

 on abdomen. Tegmina and wings absent. Supra-anal and sub- 

 genital plates in both sexes of the type characteristic in the genus 

 Eurycotis. Limbs heavily spined as in that genus. Tarsal joints 

 elongate and slender. Caudal metatarsus longer than combined 

 length of succeeding joints, supplied with a double row of minute 

 ventral spines to its extremity, which border distad the large 

 elongate distal pulvillus. Succeeding three joints with ventral 

 surfaces fully occupied by large pulvilli. Large arolia present. 



Lamproblatta albipalpus new species (Plate XVII, figs. 7, 8 and 9. ) 



This species shows nearest general resemblance to Eurycotis 

 mexicana (Saussure), differing signally, however, in its jet black 

 coloration, white palpi and the features given in the generic 

 discussion. 



Compared with meridionalis, that species is found to differ in 

 both sexes in having the limbs blackish chestnut rather than 

 black, the pale portions more j^ellowish and not as contrasting, 

 ochraceous-buff, and the supra-anal plate truncate distad, the 

 distal margin showing no emargination and transverse or very 

 feebly convex. The most important differential character, how- 

 ever, is that in meridionalis both sexes have similarly simple, 

 elongate, slender metatarsi. 



TRANS. AM. ENT. SOC, XLV. 



