50 NEW NOKTH AMERICAN MELANOPLI (ORTHOPTERA) 



assigned to the present geographic race are distinguishable by 

 their more robust form, with pronotum presenting a slightly 

 more swollen appearance and less definition between the disk 

 and lateral lobes, much broader tegmina, which are attingent, 

 and caudal tibial coloration, these members being bright red 

 distad. 



Males of the present race are similar to the females except 

 as described below, the deeply forked cerci being distinctive. 

 In general form they are more nearly comparable to males of 

 Phaulotettix compressus (Scudder), than to those of the species 

 of other North American genera of the Melanopli. From the latter 

 they differ in the more flattened frontal costa, more inflated 

 pronotum, with transverse sulci more decided and caudal margin 

 feebly but distinctly convex, much broader and nearly attingent 

 tegmina, small blunted and well separated furcula, much broader 

 supra-anal plate, furcate cerci, prominent pallium, shallower 

 and differently shaped subgenital plate and distinctive color- 

 ation. 



Type. — d 71 ; Uvalde, Uvalde County, Texas. Elevation, 1000 

 to 1100 feet. August 21, 1912. (Rehn and Hebard.) [Hebard 

 Collection, Type no. 749.] 



Size medium large; form robust, when compared with species of nearest 

 affinity. Head large, eyes large and prominent, the greatest width across 

 the eyes approximating the greatest pronotal breadth. Vertex much as in 

 Phaulotettix, slightly produced and bluntly rounded, its dorsal surface moder- 

 ately concave particularly between the eyes, where delicate convex lateral 

 carinae are distinct and approximate. Frontal costa broad and flat, showing 

 weak depression about the median ocellus, below that point gradually dis- 

 appearing into the face. 



Pronotum with dorsal and lateral portions of prozona smooth, but with a 

 few impressed punctae laterad and somewhat inflated between the decided 

 transverse sulci, which sever the medio-longitudinal carina, this carina distinct 

 except between the transverse sulci, where it is very weak. 2 Pronotal lateral 

 carinae, which are subobsolete through the lateral margins of the disk, are 

 apparent on the prozona, due to the color pattern; metazona impresso-punc- 

 tulate, the caudal margin of the disk weakly but distinctly convex. Tegmina 

 very broad oval, extending slightly beyond caudal margin of metanotum, 

 separated by a very slight interval. Minute, very elongate oval, vestigial 

 wings present, concealed by the tegmina. Large, open tympana covered by 

 the tegmina. 



2 Apparently variable in this portion, as it is subobsolete to distinct in the 

 large series before us of the Trans-Pecos Texan race (A. m. crypsidomus) of 

 the species. 



