76 NORTH AMERICAN BLATTIDAE . 



C. Tegmina represented by subtriangular, lateral pads. Wings vestigial. 

 D. Tegmina elongate, subtriangular, lateral pads. General coloration very 

 pale. Supra-anal plate with lateral margins at bases of cerci showing a 

 very broad and weak triangular production, .desertae (Rehn and Hebard) 

 DD. Tegmina roundly subtriangular, lateral pads. General coloration 

 ferruginous to very dark. Supra-anal plate with lateral margins converg- 

 ent and weakly concave uhleriana (Saussure) 



CC. Tegmina represented by subquadrate, slightly overlapping pads. Wings 

 greatly reduced. 

 D. Tegmina truncate distad, this commencing at apex of anal field. 



E. Size rather small, form relatively slender. Pronotum; length 3.2 to 

 3.8, width 4 to 4.9 mm. General coloration normally more hazel. Mar- 

 gin of sixth dorsal abdominal segment weakly convex mesad. Supra-anal 

 plate with lateral margins normally straight and convergent to sharply 



rounded apex virginica (Brunner) 



EE. Size medium, form broad. Pronotum; length 3.1 to 4.9, width 4.6 

 to 6.6 mm. General coloration normally kaiser brown and blackish 

 brown. Margin of sixth dorsal abdominal segment distinctly convex 

 mesad. Supra-anal plate with lateral margins normally convergent and 

 rather feebly concave to rather bluntly rounded apex. 



fulvescens (Saussure and Zehntner) 

 DD. Tegmina truncate distad, this commencing beyond apex of anal field. 

 (Size very large, form very robust. Pronotum; length 4.8 to 6.1, width 6.8 

 to 8.2 mm. General coloration kaiser brown, hays russet and blackish 

 brown. Sixth dorsal abdominal segment and supra-anal plate as in ful- 

 vescens lata (Brunner) 



BB. Tegmina only moderately reduced, neither lateral or truncate distad. 



C. Tegmina with apices not reaching beyond apex of supra-anal plate. Sus- 

 tained flight impossible. 



D. General color ochraceous-tawny notha (Rehn and Hebard) 



DD. General coloration dark brown with various paler markings. 

 E. Dorsal surface of abdomen buffy, heavily banded with brown. 



zebra new species 

 EE. Dorsal surface of abdomen not banded. 



F. Size normally smaller. .Pronotum; length 3.7 to 4.9, width 4.7 to 

 6.6 mm. Coloration normally less solid, with lateral margins of pro- 

 notum less strikingly pale.'^" divisa (Saussure and Zehntner) 



FF. Size normally larger. Pronotum; length 4.3 to 5.8, width 5.1 to 

 7.2 mm. Coloration normally more solid, with lateral margins of 



I)ronotum more strikingly pale pensylvanica (DeGeer) 



CC. Tegmina with apices reaching beyond apex of supra-anal plate. Sustained 

 flight possible. (General color ochraceous-tawny.). . . .caudelli new species 



"" Head decidedly more flattened in material from the southwestern portion of the 

 species' distrilnition. 



