262 NEW NORTH AMERICAN DECTICINAE 



Caudal 



Length of Length width of Length of Length of 



body of iironotal tegmcn caudal 



pronotiun disk femiu- 



Mt. Wbitne.v, California, 



parcdypes 20.2-24.4 4.2-5 4-4.8 6.6-8.6 11.7-12.4 



Mono Pass, California 24 5 5.1 7.7 12.3 



9 



Mt. Whitney, California, 



allotype 21.7 5 4.1 6.5 13.7 



The length of the ovii)ositor of the allotype is 18 mm. 



The armament of spines of the ventral femoral margins is as follows, that 

 for the type given first, followed by the extremes for the series. Cephalic 

 femur, ventro-cephalic 3 and 5, 3 to 6; ventro-caudal 1 and 3, to 3; median 

 femur, ventro-cephalic 3 and 3, 1 to 6; ventro-caudal 1 and 2, to 4; caudal 

 femur, ventro-external 4 and 7, 1 to 8; ventro-internal 3 and 5, 2 to 10. 



In addition to the described pair, five adult males are l^efore us, 

 bearing the same data, except that one was taken on the south- 

 western slope of Mount Muir (a spur of Whitney Ridge) at 

 13,100 U'Qt, and one at the highest point in the United States, 

 the summit of Mount Whitney, 14,500 feet. These we designate 

 as paratypes. 



We have, moreover, a pale colored adult male, taken at Mono 

 Pass, California, at 10,600 feet; a third grown immature male from 

 the summit of Mount Whitney, taken on August 12, 1908; a near- 

 ly adult female taken on the Kern-Kaweah Divide, Tulare 

 County, California, at 12,000 feet, on July 12, 1910, by W. Colby, 

 and one smaller immature female taken on Mount Rixford Ridge, 

 Fresno County, California, at 12,000 feet, on August 12, 1914, by 

 F. Grinnell, Jr. Of this series, all are in the Philadelphia Col- 

 lections except the first mentioned immature male and female, 

 which are the property of the California Academy of Sciences. 

 All of the localities are in the southern Sierra Nevada Mountains. 



The following field notes were made. "These remarkable in- 

 sects live among the granite boulders and slabs, where ther(> is no 

 vegatation whatever, except small quantities of blackish lichens. 

 With the lichens they harmonize, but a few looked conspicuously 

 black on the grayish grani((> whei'e they were found. Some were 

 foimd on the (lecom])()se(l gi'anite sand in chinks of the enormous 

 rock slides, while fi'('(|ueiilly males wei-e ium'cIumI on (he u])per 

 edg(> of gi'anite boulders, siridulating in the suiili^lit. A high 



