246 NORTH AMERICAN OEDIPODINAE (ORTHOPTERA; ACRIDIDAE) 



usually with narrow incomplete annular patches of blue-black to black- 

 ish. Caudal femora with one distinct and several indistinct dark patches on 

 the dorsal surface, external face often quite hoary white, ventral carinae 

 irregularly beaded with brown: caudal tibiae on normally exposed surfaces of 

 general color, on normally hidden surfaces tyrian blue to deep orient blue; 

 spines black tipped on brown. 



The Pecos series is quite uniform in general coloration, the wing-band varying 

 somewhat in extent and strength, the disk color constant. The Sierra Blanca 

 specimens and the Las Cruces female are darker in color, less grayish buff in 

 general tone, more brown buff, the pale areas duller and dark areas more 

 extensive. The Grand Canyon female is more like the Sierra Blanca speci- 

 mens, and, in addition, has the wing-band broader than in any of the other 

 specimens. 



Measurements (in millimeters) 



Greatest 



(caudal) Length of 



jl Length of Length of width of Length of caudal 



^ body pronotum pronotum tegmen femur 



Fecos, Texas, type 19.3 3.6 3.4 20.5 11 



Pecos, Texas, para^ypc 20.2 3.9 3.5 22 11 



Pecos, Texas, para; i/pe ... . 18.8 4 3.5 21.4 11.4 



Sierra Blanca, Texas 18.2 3.8 3.3 20 10.2 



9 



Pecos, Texas, dio^i/pe 30.2 5.3 4.8 26.8 14.5 



Pecos, Texas, paratijpe 26 . 2 4.6 4.2 25 . 5 13.5 



Pecos, Texas, paraiype ... . 31.3 5.8 4.9 28.5 15 



Sierra Blanca, Texas 24 .4 4.9 4.2 23 .8 12 



Sierra Blanca, Texas 26 5.1 4.5 24 .8 13 .5 



Las Cruces, New Mexico . . 26.2 5 4.2 26.4 12.8 



Grand Canyon, Arizona .. . 25.4 4.6 4 24 12.2 



This most interesting species, which is so inconspicuous when 

 at rest in its native environment, and which displays such beauti- 

 fully colored wings when in flight, is apparently extremely local, 

 and as our material shows has a relatively extensive distribution, 

 of which, at this writing, our knowledge is very incomplete. We 

 have before us a paratypic series of fourteen malfes and twenty 

 females bearing the same data as the type and allotype; a series 

 of four males and three females taken at Sierra Blanca, El Paso 

 County, Texas, elevation, 4524 to 4950 feet, September 13 to 14, 

 1912, (Rehn and Hebard); one female, taken at Las Cruces, 

 Donna Ana County, New Mexico on August 5; and a female taken 

 on the plateau below Bright Angel in the Grand Canyon of the 

 Colorado, Coconino County, Arizona, elevation 3500 to 3800 feet, 

 September 12, 1907, (Hebard). 



At Pecos the species occurred on the bare spots of an adobe 

 flat, where it was fairly numerous, but very shy and in scattered 



