i8o 



NORTH AMERICAN BLATTIDAE 



margins convergent and weakly convex to an acute-angulate median emargination, 

 which extends nearly half the distance to base of plate. Subgenital plate as typi- 

 cal for the Blattinae (pi. VII, fig. 9). 



Measurements {in millimelers) 



cf 



Length Length 

 of of pro- 

 body notum 



Philadelphia, Pennsylvania 29.7 7.6 



Thomasville, Georgia 30.2 8.2 



Thomasville, Georgia 34-2 9.6 



Big Pine Key, Florida 29 . 3 8.2 



Big Pine Key, Florida 33 . 3 9.3 



Yuma, Arizona 32.2 8.4 



9 



Philadelphia, Pennsylvania 29.5 7.9 



Philadelphia, Pennsylvania 28 8.4 



Key West, Florida 31.6 9.4 



Decatur, Alabama 31.8 8 



Shovel Mountain, Texas . . 34 9.4 



Tucson, Arizona 27 . 8 8.4 



Width 

 of pro- 

 notum 



9.1 

 9.8 



II-3 

 10.3 



II-3 

 10.2 



9-7 

 II .2 

 II. 8 



II-3 

 II .2 

 10.8 



Length 



of 

 tegmen 



29.6 



31 



35 

 30 

 35 

 30 



239 



25 



28.4 



27.2 



27.2 



23-9 



Width 



of 

 tegmen 



9.2 



9-9 

 II . I 



9.8 

 10.4 



9-4 



8.7 



9-3 



10.6 



9-7 



9-7 



8.3 



Length 



of 

 cercus 



6.4 



7 



7-1 



6.7 



7 

 6.3 



4-9 

 5-8 

 6.9 

 6.4 

 6.4 

 6 



Length 

 of cau- 

 dal tibia 



II 

 12.2 



14-3 



131 

 13.2 



13 



The considerable size differences are due entirely to individual 

 variation. Depauperate females sometimes closely resemble that 

 sex of brunnea, the supra-anal plate is, however, always more 

 deeply emarginate meso-distad and the cerci, though varying 

 greatly in length, are always more slender distad. 



Coloration. — Head with occiput chestnut, shading to blackish 

 brown between eyes; face chestnut, shading laterad and on clypeus 

 to ochraceous- tawny, ocelli buffy. Pronotum antimony yellow, 

 with two very large blotches of chestnut, which fuse caudad and 

 extend to margin of pronotum cephalo-laterad ; caudal margin of 

 pronotum margined with a slightly darker shade of chestnut, the 

 lateral margins very narrowly outlined in this color; all of these 

 markings shading gradually into the paler ground color. Teg- 

 mina and greater portion of anterior field of wings transparent, 

 chestnut brown, except proximad on tegmina, where a deeper 

 tone makes this portion translucent. Dorsal surface of abdomen 

 antimony yellow, heavily washed with sanford's brown. Supra- 

 anal plate of male transparent and colorless. Limbs ochraceous- 

 buff, becoming tawny distad, spines tawny. In specimens of reces- 



