MORGAN HEBARD 29 



ginatlon of the subgenital plate, between the styles. Subgenital i^late with surface 

 rather strongly convex, somewhat asymmetrical; lateral margins elevated, sinistral 

 weakly concave, dextral moderately concave, to brief distal portion, which is de- 

 cidedly asymmetrical and concave ventrad ; at the apices of the plate are situated 

 small styles, slightly longer than wide, rounded and armed dorsad with numerous, 

 separated, minute, short, stiff hairs. 



Characters of Female— Type. (Esperanza Ranch near Brownsville, Texas.) 

 Agrees with male except in the following features. Form distinctly more robust. 

 Interocular space very broad, slightly broader than the very broad interantennal 

 space, ocellar spots weakly defined. Pronotum more ample, weakly convex, with- 

 out trace of discal Battening; caudal truncation greater, point of greatest width 

 caudad. " Tegmina slightly more corneous in structure, decidedly reduced, not 

 reaching distal segments of abdomen; costal and sutural margins arcuato-con- 

 vergent distad to moderately broadly rounded apex, which is situated mesad; 

 discoidal sectors fewer (due to the tegminal reduction) and even more weakly de- 

 fined. Wings strongly atrophied, padlike, but folded at juncture of anterior and 

 posterior fields, reaching to median segment. Supra-anal plate strongly trans- 

 verse, not as much so as in male, weakly triangularly produced, with apex feebly 

 emarginate, showing indications of a weak medio-longitudinal sulcation. Sub- 

 genital plate weakly convex, extensively deplanate meso-distad. free margin 

 broadly convex and showing a very weak flattening at the cereal bases. 



Measurements {in millimeters) 



BrOWns\-ille, Texas Length of Length of Width of Length of Width of 



^ body pronotum pronotum tegmen tegmen 



Described To polype 9.5 2.7 3.9 10.8 3.8 



Topotypes (7) 9.8-10.4 2.8 4-4.2 10.6-11.2 3.8-4 



9 



■Type 8.7 3 4-3 ^^^ 3-2 



Topotypes (2) 10. 2-10. 5 3-3.1 4 -4-4 -6 6.2-6.4 3 -3-3 -6 



Coloration. Pronotum shining blackish brown, strikingly 

 marked with buff (Plate I, Figs, i and 6). Dorsum of abdomen 

 shining blackish brown. Tegmina: male, translucent shining 

 Sudan brown, gradually becoming paler in shade toward the mar- 

 gins; female, translucent shining deep argus brown, much paler 

 toward costal margins, particularly proximad. Wings hyaline, 

 with veins almost colorless. Head tawny, eyes blackish brown. 

 Antennae, ocellar spots, maxillary palpi and limbs ochraceous- 

 tawmy. \'entral surface of body varying in different specimens 

 from blackish to suffused tawny. 



3' This condition clearly accompanies reduction in the tegmina. 

 MEM. .\M. ENT. SOC, 2. 



