1909.] NATURAL SCIENCES OF PHILADELPHIA. 455 



the Salt Lake representatives in size. Average individuals measure 

 as follows : 



Santa Catalina Island, Cal., 

 Cottonwood, Cal., . 

 Cottonwood, Cal., . 



Santa Catalina Island, Cal., 

 Salt Lake City, Utah, . 



The Cottonwood individuals are similar to the Salt Lake specimens in 

 general coloration, while the Santa Catalina series has, as a rule, the 

 tegminal markings duller, less contrasted and less sharply defined, 

 the whole coloration being somewhat more grizzled and less generally 

 contrasted, particularly in the female, than is the case with Great 

 Basin and Mohave Desert specimens. The color of the disk of the wing 

 varies considerably in depth, in fact from very pale greenish blue to 

 rather deep cerulean blue, while the fuscous band and spur is repre- 

 sented in some specimens by mere infuscations of the veins and in 

 others by a well-defined and rather deep cloud which falls but little 

 short of the caudal margin. The caudal tibia? exhibit a considerable 

 amount of variation in the depth of the coloration. 



This species has been recorded from localities extending from 

 Washington to Montana and Wyoming south to southern California 

 and Arizona. The previous Californian records are from Los Angeles, 

 Claremont, Santa Catalina Island and Sisson. 



Trimerotropis oyaneipennis Bruner. 



Two males and one female of this species were taken on volcanic 

 foothills of bare black rock with hardly any vegetation near the North 

 Range of the Providence Mountains, August 12. 



These individuals measure as follows : 



In general coloration the Providence Mountains specimens resemble 

 individuals from Salt Lake City, although considerably smaller. 



