248 NORTH AMERICAN BLATTIDAE 



Characters of Female. — (Esperanza Ranch, Brownsville, Texas.) Very similar to 

 male, differing in the following features. Dorsal surface of abdomen unspecialized. 

 Supra-anal plate transverse, medio-longitudinally sulcate, weakly triangularly pro- 

 duced, with apex incised. Subgenital plate large, distal portion rectangularly pro- 

 duced and with a medio-longitudinal linear cleft to base of triangle thus formed, 

 this produced portion apparently flexible, bent strongly upward in this specimen.^*" 



Measurements {in millimeters) 



T] Length of Length of Width of Length of Width of 



body pronotum pronotum tegmen tegmen 



St. Simon's Island, Georgia — 8.3 2.1 3 9.3 2.8 



Jacksonville, Florida — 8.3 2.1 3.1 8.g 2.8 



Type. (Ex. S. & Z.) — "9-5" "2.25" "3.2" "9" — 



Brownsville, Texas (6) 7.8-8 1. 6-1. 8 2.6-2.7 7 2-7. 8 2.3-2.4 



9 



Coast of South Carolina. . . — 8.4 2.2 3.3 8.4 2.9 



Atlantic Beach, Florida .. . — 7.4 1.8 3 7.7 2.9 



Key Largo, Florida — 8.2 2 3 7.6 2.8 



Near Waco, Texas — 8.2 2 3.2 8.6 2.8 



Brownsville, Texas (5) 7.3-7.7 1.7-1.9 2.4-2.7 6.8-7.3 2.4-2.5 



The material from Brownsville averages distinctly smaller than 

 that from more northern Texas or from the Atlantic Coast. This 

 is due either to geographic size variation, or local environmental 

 conditions; other differences do not exist in the series. Saussure's 

 Texan specimen, type of texensis, came from Boll and, in conse- 

 quence, very probably from the vicinity of Dallas. 



Coloration. — Disk of pronotum, head and abdomen, ochraceous- 

 buff tinged with ochraceous-tawny, to weak ochraceous-tawny. 

 Remaining portions of pronotum, marginal field of tegmina and 

 portion of dextral tegmen, concealed when at rest, transparent, 

 with a weak buffy tinge. Other portions of tegmina transparent, 

 tinged wdth ochraceous-tawny. Wings hyaline, w-eakly iridescent, 

 tinged with ochraceous-tawny in area of costal veins and in area of 

 forks of axillary vein, near base of appendicular field. Eyes dark 

 brown. Limbs ochraceous-buff. In one specimen (Marietta, 

 Georgia) the head is i)ale but the pronotum has the disk narrowly 



'•*" In such s|)eiiinens, freiiucnl in ihe series before us, what would appear to be the dis- 

 tal margin of the i)late is broadly transverse mesad, the triangularly projecting portions 

 being concealed within the anal chamber. 



