20 NORTH AMERICAN BLATTIDAE 



C. Arolia present. Size large. 

 D. Tegmina much reduced. 



E. Tegmina represented by subquadrate pads with sutural margins 

 weakly overlapping. General coloration immaculate, dark claret brown. 

 Pronotum rarely showing traces of lateral yellow bands. 



Eurycotis floridana (Walker) 

 EE. Tegmina represented by small, rounded trigonal, lateral pads. Gen- 

 eral coloration blackish brown, involutely pictured with buffy. 



Neostylopyga rhombifolia (Stoll) 

 DD. Tegmina little reduced, extending beyond apex of abdomen. 

 E. Coloration not solid. General coloration reddish brown. 



F. Pronotum antimony yellow, with two very large, suffused blotches 

 of chestnut. Tegmina unicolorous. 

 G. Supra-anal plate with a deep, acute-angulate, median emargina- 

 tion. Cerci very elongate and slender distad. Tegmina and wings 

 averaging more elongate. Size averaging slightly larger. 



Periplaneta americana (Linnaeus) 

 GG. Supra-anal plate with a much less deep median emargination. 

 Cerci not as elongate, not as slender distad. Tegmina and wings 

 averaging less elongate. Size averaging slightly smaller. 



Periplaneta brunnea Burmeister 

 FF. Pronotum ochraceous-buff with an orange tinge, with two large, 

 sharply defined, blotches of black. Tegmina deep bay, with marginal 

 field strikingly ochraceous-buff. 



Periplaneta australasiae (Fabricius) 

 EE. Coloration solid, shining blackish brown. 



Periplaneta fuliginosa (Serville) 

 CC. Arolia absent. Size medium. (Tegmina represented by small, rounded 

 trigonal, lateral pads. General coloration shining blackish brown.) 



Blatta orientalis Linnaeus 

 AA. Ventral margins of femora unarmed, or supplied with few distal spines. i' 

 B. Tegmina present. (Median and caudal femora with a disto-dorsal genicular 

 spine.) 

 C. Subgenital plate simple. 



D. Tarsal claws simple. Supra-anal plate weakly bilobate. Ocellar spots 



present. Four proximal tarsal joints each bearing a pulvillus. 



E. Size medium small. Pronotum strongly obtuse-angulate produced 



caudad, with ai)ex rounded. Arolia present. 



F. General coloration brown. Tegmina thickly sup])licd proximad with 



minute jMts. (Pronotum shining blackish brown margined cephalad, 



1" In Arenivaga and Eremohlatla, the ventro-cephalic margins of the cephalic femora are 

 alone armed; in the former with chaetiform spines, in the latter with short, conical 

 spines. In Attaphila fungicola, the ventro-cephalic margin of the caudal femora alone is 

 supplied with several stout spines. 



