110 PROCEEDINGS OF THE ACADEMY OF [Jan. 



r 



9 9 



Average of six ; Average of three ; 



Laguna del Gato, Montelovez, 



Hidalgo Co., Tex. Coahuila, Mex. 



Apparent length of teginen . 1.2(1.1-1.5) 1 . 4 ( .8-1.8) 



Greatest width of teginen 2.2(2.1-2.3) 2.4(2. -2.7) 



Length of cephalic femur 9. (8.7-9.3) 9.4(8.8-10.) 



Length of median femur 10.2.( 9.8-11. ) 10.3 ( 8.7-11.2) 



Length of caudal femur 23 . 3 (22 . 4-24 .7) 24 . 6 (23 . 3-26 . 5) 



Length of ovipositor 8.2(7.7-8.7) 9.1(8.6-9.8) 



9 9 



Average of four; 



Jaral, Coahuila, Mex, 



Length of body 20.8 (20. -21.5) 



Length of pronotum : 5-3 ( 5.2- 5.8) 



Greatest dorsal width of pronotum 3.3 ( 3.2- 3.5) 



Apparent length of tegTiien 1. ( .8-1.1) 



Greatest width of tegmen 2.3 ( 2. - 2.5) 



Length of cephalic femur .' : 8.4 ( 8.-9. ) 



Length of median femur 9.3 ( 9. -10.1) 



Length of caudal femur 21. 1(20.6-22.2) 



Length of ovipositor 8.1 ( 8. - 8.3) 



From the above measurements it is evident that considerable 

 variation, both geographic and individual, is present in this species. 

 The geographic evidence shows that material from southern Arizona 

 and the elevated portions of western Texas averages smaller than 

 the series from southern Texas (Laguna del Gato) and Coahuila^ 

 Mexico, particularly in the femoral length. The Jaral, Coahuila, 

 females are not, however, of the same general proportions as the 

 Montelovez, Coahuila, specimens of that sex, and, although we are 

 unable to locate the latter locality, possibly altitude may be respon- 

 sible, Jaral being near the four-thousand-foot contour line. It is 

 possible that the character of cover and richness of same may be a 

 factor in determining the amount of geographic variation. The 

 individual variation is considerable in all of the series, ])ut the only 

 really puzzling feature is the occurrence of large females with heavy 

 pronoti. In the Montelovez series these are more numerous (three 

 out of four) than elsewhere, l)ut the paratypic female from Mesilia 

 Park and to a lesser degree the Uvalde specimen are of this type. 

 This point is treated in greater detail under Remarks. 



Color Notesr'^ — The series of this species exhibits a very considerable 



^* The remarks here set forth on color variation have been made entirely from 

 material which has been stuffed or which is considered by the authors to have 

 retained in a great measure the color tones of the living insect. 



