384 PROCEEDINGS OF THE ACADEMY OF [July, 



LIGUEOTETTIX McNeiU. 

 Ligurotettix kunzei Caudell. 



This extremely interesting and peculiar species is represented by a 

 series of forty-five specimens taken at Tucson, July 26 (three d^, two 

 9 ), Sonora Road near Tucson Mountains, July 25 (twelve c?, five 

 adult ? , one immature 9 ), Roeble's Ranch, July 24 and 25 (eight c?, 

 one adult $ , one immature 9 ), Sentinel, Maricopa County, July 27 

 (one 6"), and Yuma, July 27 (three c^, eight 9 ). 



The Yuma specimens are as large as Tucson individuals and do not 

 seem to approach the smaller Californian L. coquilletti. In size the 

 whole series is fairly uniform, some slight individual variation being 

 noticed in both sexes. Average specimens from the localities repre- 

 sented in the collection measure as follows : 



Length of Length of Length of 



body. tegmina. caudal femora. 



Tucson, 18 mm. 16.8 mm. 9.7 mm. 



Near Sonora Road, . . 16.4 '' 15.2 '' 9 " 



Roeble's Ranch, . . . 16.5 " 16.1 " 9 " 



Sentinel, 16 '' 15.2 " 9.5 " 



Yuma, 17.5 " 16.7 " 10.2 " 



9 



Tucson, 24.2 mm. 22,4 mm, 12.5 mm. 



Near Sonora Road, . . 23.5 " 21.7 " 12 '' 



Roeble's Ranch, ... 22 " 20.8 '' 11.7 " 



Yuma, 24.5 '' 22 " 12.8 " 



In color there is a considerable amount of variation, all, however, in 

 conformity with the subdued color pattern of the insect. The most 

 peculiar variation is in the presence of blackish brown on the cephalic 

 half or more of the lateral lobes of the pronotum, and also on the pleura 

 accompanied by a suffusion of the gense. In its complete form this 

 phase is present in but one female from Yuma, in which the contrast 

 with the pale dorsum and caudal portion of the lateral lobes is very 

 striking, although suggested more or less strongly by a few, chiefly 

 males, from Tucson, Sonora Road and Roeble's Ranch. There is a 

 considerable amount of variation in the sprinkling and lining of the 

 dorsum of the pronotum and head and the tegmina with blackish brown, 

 this being, however, more noticeable in the females than in the males. 

 The Yuma specimens as a series and the Sentinel individual are paler 

 and more ashy than those from the vicinity of Tucson and the Papago 



