238 NEW NORTH AMERICAN DECTICINAE 



Abdomen with its dorsum varying from dresden lirown (recessive) to black- 

 ish ('hcstnut (intensive), the distal margin of all the tergites narrowly, but in 

 intensively colored specimens strikingly, bordered with l^etween yellow ocher 

 and primuline yellow: cerci weakly washed with the general dorsal abdominal 

 coloration on an ochraceous ground. Ovipositor of the general color, with 

 the apex of the dorsal margin and distal portion of the ventral margin pen- 

 cilled with fuscous. Femoral spines blackish fuscous; tibial spines black 

 tipped, articulate tibial spines and tibial spurs similarly black tipped, but 

 area at their insertion also infuscate, all tibial spines and spurs, exclusive 

 of the spines of the dorsal margins of the caudal tibiae, each with a longitu- 

 dinal hair-line of blackish. 



Mcasurenicnts {in tnUliincters) 



These measurements show that very consideral)lc individual variation in 

 size is present in the species. 



In addition to the type and allotype we have l)cfore us eight 

 male and six female paratypes, taken at Marathon, Texas, Aug- 

 ust 26 and 27 and Septeml)er 12 and 13, 1912, by Rehn and Heb- 

 ard. We have also one male taken at Hackberry Creek, Boquillas 

 Road, Brewster County, Texas, September 2, 1912, (Rehn and 

 Hebard) ; one male taken two miles north of Bone Spring, Brew- 

 ster ('ounty, Texas, elevation 2720 feet, September 9, 1912, (Rehn 

 and H(>bard) ; one female taken in the Chisos Mountains, Brewst(n' 

 County, Texas, July, 1911, (H. A. Wenzel), the latter in the col- 

 lection of the Academy of Natural Sciences of Philadelphia, and 

 three females taken at Jaral, State of Coahuila, MexicQ, Novem- 

 ber 1 to 3, 1909, ])y J. Friesser and from the collection of the Field 

 Museum. 1^'rom these records it is evident that the s])ecies ranges 

 from the Trans-Pecos region of Texas, south over the north-eastern 

 portion of the Mexican tal)leland to at least as far as south(M-n 

 Coahuila. 



* Abdomen somewhat shrunken, the specimen having been dried from 

 liquid preservative. 



