MORGAN HEBARD I 65 



EURYCOTIS Stal 

 1874. Eurycotis StaK Bih. K. Svensk. Vet. Akad. Handk, ii, no. 13, p. 13. 



The genus includes numerous West Indian and tropical Ameri- 

 can species, but one being found in, and peculiar to, the United 

 States. 



The present genus is separated from Pelmatosilpha by the more 

 reduced organs of flight. Though this feature is valueless, even 

 for specific separation, in many of the forms of the Pseudomopinae, 

 it apparently constitutes a valid diagnostic character in the pres- 

 ent instance and is, indeed, usually far more important throughout 

 the Blattinae. ^Monographic studies, however, must be undertaken 

 before definite conclusions can be reached. 



The genus Eurycotis divides into several distinctive groups. ^^^ 



Genotype, by original designation: Eurycotis ritfovittata [Polyz- 

 [osteria] rufovittata] (Brunner) = Eurycotis mysteca [P[eriplaneta\ 

 mysteca] (Saussure). 



Generic CJiaracters. —Sexes similar. Width between eyes 

 greater than that between antennal sockets. Pronotum convex, 

 roundly trapezoidal, not covering vertex of head. Tegmina squami- 

 form or quadrate, not extending beyond metanotum and truncate 

 distad. Wings absent, squamiform or greatly reduced. Ventro- 

 cephalic margins of cephalic femora supplied with stout, not very 

 elongate, moderately recurved spines, decreasing slightly in length 

 distad and terminating in three spines, more elongate in increas- 

 ing ratio distad; ventro-caudal margins supplied with few, stout, 

 elongate spines. Other ventral femoral margins supplied with 

 numerous, stout, elongate spines; those of the caudal margins 

 distinctly the longer. External tibial spines tri-seriately arranged. 

 Tarsal joints heavy; metatarsi supplied \-entrad with an elon- 

 gate distal pulvillus, succeding three joints each with \entral sur- 

 face occupied by a large pulvillus. Arolia ample, with dorsal sur- 

 faces chitinous, distal margins feebly convex, truncate. 



2" Kirby, misundcrstandini; the degree of tegniinal redui-tion used to .separate Eury- 

 cotis from Pelmatosilpha, incorrectly transfers opara (Brunner) and floridana (Walker) 

 to the latter genus. Syst. Cat. Orth., i, p. 143, (1904)- 



MEM. AM. ENT. SOC, 2. 



