66 



NORTH AMERICAN BLATTIDAE 



d' 



Length of 

 body 



Mountain Grove, Missouri. ... 17 



Waco, Texas 16.5 



9 



Reega, New Jersey 14-5 



Reega, New Jersey if? 



Washington, District of Colum- 

 bia 15-5 



Raleigh, North Carolina 13 • 3 



Raleigh, North Carolina 16 



Hebardville, Georgia 15 



Jacksonville, Florida n 



Homestead, Florida 



Homestead, Florida 



Chokolo-skee, Florida 



Crawford County, Indiana. 



Ottawa. Kansas 



Mountain Grove, Missouri . 



Length of 

 pronotum 



4 4 



3-8 



4.2 

 4-7 



4-7 



4 



4.6 



4-7 



4 



4-5 



5 



5-2 



4-7 



5 



5-2 



Width of 

 pronotum 



5-3 

 5 



5-3 

 6.2 



6 



5-2 



6 



5-9 



4-9 



5-7 



6.9 



7 



6.4 



6.8 



7-3 



Length of 

 tegmen 



19.6 



16. 



Width of 

 tegmen 



6 

 51 



3-9 

 4.6 



The considerable size variation shown appears to us to be due, 

 in large part, to local environmental conditions rather than to 

 geographic influences. It is evident, however, that the largest 

 size development occurs toward the centers of maximum devel- 

 opment of the vegetation of the Upper Austral Zone, and again in 

 Tropical Florida. 



Coloration.^^ — d" . General color of entire insect, except wings 

 and limbs, shining blackish brown, on the tegmina becoming dis- 

 tad slightly paler, chestnut brown, and translucent. Ocelli and 

 clypeus pale buff. Limbs and spines ochraceous-orange. Teg- 

 mina and wrings often inconspicuously margined, in area of costal 

 veins, with bufty. Wings transparent, washed with chestnut 

 bro\vn, this more decided in proximal portion of costal veins and 

 distal area of anterior field, veins translucent chestnut brown. 

 Only in the series from Crawford County, Indiana, are the tro- 

 chanters and femora shining chestnut brown, strikingly darker 

 than the tibiae and tarsi. '•'° 



83 As we have noted in other species of Blatticlae, individuals of this species are very 

 pale in color after moulting, becoming darker very gradually and only attaining their 

 full coloration when the chitin has fully hardened. Such specimens are sometimes diffi- 

 cult to determine. See footnotes 92 and 93. 



8" As originally described by Brunner, but clearly not the normal condition over the 

 greater portion of the species' distribution. 



