92 NORTH AMERICAN BLATTIDAE 



brown. Dorsal surface of abdomen sayal brown, with lateral, 

 broken, suffused bands of chestnut brown, leaving narrow lateral 

 margins of cinnamon-buff. Cerci warm sepia. The male from 

 Dallas, Texas, differs in having the discal sulci warm sepia, the 

 intervening space tawny. That from Victoria, Texas, shows an 

 extreme recessive condition with general coloration weak cinnamon- 

 buff, the tegmina with a pearly luster, ^^^ pronotum with disk cin- 

 namon-buff', the abdomen with lateral dark markings, above and 

 below, represented only by single small dots of verona brown on 

 each segment, the median segment hair-tuft mikado brown. 



9 . {Allotype.) Head with vertex pale ochraceous-tawny^ 

 below this the face is marked with a subquadrate patch of verona 

 brown, remaining portions of face cinnamon-buff", ocelli feebly 

 indicated in that color. Limbs cinnamon-buff". Ventral surface 

 of abdomen with each segment warm sepia, narrowly margined 

 caudad with cinnamon-buff, except the proximal segments, in 

 which the cinnamon-buff covers the entire segment mesad, sub- 

 genital plate warm sepia, with a round meso-lateral spot of cin- 

 namon, continued to the lateral margins in cinnamon- buff". Pro- 

 notum with broadly suffused, converging lines of verona brown 

 in position of discal sulci, with single dots of the same cephalad, 

 inter\ening space clouded with sayal brown, remaining portions 

 of pronotum warm buff". Tegmina translucent snuff" brown, with 

 marginal fields warm buff". Dorsal surface of abdomen with each 

 segment broadly margined laterad and caudad with warm buff, 

 in remaining portions blackish brown. Supra-anal plate warm 

 buff, suffused with blackish brown proximad. In two other 

 females before us the lines in the position of discal sulci on the 

 pronotum are narrower and weaker, mikado brown. The con- 

 trast in the coloration of the dorsal surface of the abdomen is nat- 

 urally not as decided in specimens of more recessive coloration, 

 while it is also clear that, in drying, the decided natural contrast 

 is often partially lost. 



Specimens Examined: 12; 5 males, 4 females, 2 immature males and i immature 

 female. 



"0 A noticeable feature in recessive males of P. divisa and P. pcusylvanica, not fmind 

 in the other species of the genus. 



