MOKGAN HEBARD 363 



homologous markings occur on the ventral face, these reaching to the ventral 

 margin of the external pagina. Caudal tibiae proximad dark, then with a 

 broad annulus of cartridge buff,' the remaining portions pinkish buff, suffused 

 proximad and distad; tarsi pinkish buff; spines pinkish buff with immediate 

 apices black, spurs pinkish buff with distal half black. 



In some specimens the ground coloration varies toward vinaceous-cinna- 

 mon, in discolored examples approaching mikado brown. The degree of 

 intensity and extent of the black suffusions and markings is variable. 



The coloration of the sexes is similar and in no specimens is the general 

 coloration dark or the ventral surfaces of the caudal femora richly colored 

 as in excelsa. 



Specimens Examined: 28; 11 males, 15 females and 2 immature individ- 

 uals. 



California: Mount Gould, Fresno County, 12,000 feet, VII, 9, 1910, 

 (E. C. Van Dyke), 3 9, [Cal. Acad. Sci. and Hebard Cln.]. Pinnacles of 

 Mount Whitney, Sierra Nevada, Tulare County, 13,770 feet, IX, 7, 1919, 

 (M. Hebard), 1 juv. 9 • East foot of Whitney Pass, Sierra Nevada, Inyo 

 County, 12,000 to 12,500 feet, IX, 7, 1919, (M. Hebard), 2 d\ 4 9. Lone 

 Pine Lake, Whitney Pass Trail, Sierra Nevada, Inyo County, 10,000 to 

 10,100 feet, IX, 6, 1919, (Rehn and Hebard), 9^,8 9,1 juv.? 9, type, 

 allotype and paratypes. 



At the base of a two thousand foot north-facing precipice, just 

 above Lone Pine Lake, a rather extensive detrital slope of gray 

 decomposed granite was examined on September sixth. Scarcely 

 any vegetation grew there, but a specimen of this species was 

 found on the bare gravel between the boulders. Intensive search 

 showed the insect to be widely distributed over this apparently 

 barren area, though very scarce and difficult to see, due to its 

 exceedingly protective coloration. Our notes say — "One male 

 was watched. It would take two or three short toad-like leaps, 

 then climb up on the nearest granite pebble with spider-like 

 agility and, after weaving slightly from side to side once or twice, 

 would come to rest. It then blended absolutely with its sur- 

 roundings." 



On the following day the author found an immature individual 

 far above timber line, among the pinnacles of Mount Whitney, on 

 bare granite sand. No vegetation was noted anywhere near that 

 elevation except lichens and one or two dandelions in a rock 

 crevice. Below, at the head of Lone Pine Canyon and ascending 

 Whitney Pass, six adults were taken. At the lower elevation 

 there were a few arctic-alpine plants in the granite debris, at 

 the upper elevation hardly any vegetation of any sort. 



TRANS. AM. ENT. SOC, XLVI. 



