158 NORTH AMERICAN BLATTIDAE 



toothed; intro-dextrad on this margin is a larger, roughly anvil-shaped, corneous 

 style, with inner margin bearing stout teeth and pointed extremity projecting prox- 

 imo-laterad, elongate, acicular. Between these styles and the cereal bases, along 

 the inner surface of the subgenital plate near its margin, are scattered minute, 

 chitinous teeth. 



Allotype. — 9 ; same data as type. [Hebard Collection.] 



Description of Allotype. — Very similar to male, differing in the following features. 

 Head very slightly broader. Pronotum slightly more ample. Dorsal surface of 

 abdomen unmodified. Supra-anal plate very broadly shield-shaped. Subgenital 

 plate large, scoop-shaped, with caudal margin roughly convex. 



Measurements {in millimeters) 



-^ Length of Length of Width of Length of Width of 



body pfonotum pronotum tegmen tegmen 



Dallas, Texas 10.3 3.7 3.9 11. 8 3.2 



Waco, Texas 10.5 3.7 4 11. 4 3.1 



Zavalla County, Texas 11,8 3.8 4.2 11. 4 3.3 

 Brownsville, Texas, /v/jf 10.2 3.7 4 11 3.2 

 Brownsville, Texas, par- 

 atopes (6) 10-11.4 3-5-3-8 3.9-4 10.8-11.3 3-1-3-3 



9 



Dallas, Texas (2) 11-11.8 3.8-4.2 4.3-4.7 10. 9-1 1.9 3.4-3.6 



Waco, Texas (2) 9.5-10.5 3.8-3.9 4.2-4.7 11. 6-1 1.7 3.3-3.4 



Columbus, Texas (2) 11. 2-1 1.5 3.8-3.9 4.2-4.4 11. 9-1 2. 2 3.4-3.7 



Zavalla County, Texas. 15 4.8 5.3 13.7 3.9 

 Brownsville, Texas, alto- 

 type 10 3.9 4.6 1 1. 1 3.2 



Brownsville, Texas, par- 



atypes (23) 9.8-11.9 3-8-4-3 4-2-4-7 11-12.1 3-2-3-4 



Saltillo, Coahuila, Mexi- 

 co 9 3.7 4 9 • 3 



San Jose, Tamaulipas, 



Mexico 1 1. 9 3.8 4.4 13 3.6 



The above measurements indicate little geographic size varia- 

 tion in the United States; the specimen from Saltillo, Mexico, is, 

 however, distinctly depauperate. 



Coloration. — General color glossy, individually russet to brown- 

 ish black. Head tawny, occasionally darker below- the occiput. 

 Antennae dark in proximal half, with eight to twelve mesal joints 

 warm buff, distal portion of general coloration. Pronotum cin- 

 namon-rufous, broadly margined with cream color, this narrowest 

 cephalad. Ihe mesal reddish brown portion is often immaculate, 



