A Butterfly of the High Sierra Nevada. loi 



studied the life history pretty completely, from the egg to the 

 adult butterfly, and sent alcoholic specimens to Dr. H. G. Dyar, 

 who described them minutely in the Canadian Entomologist 

 for 1893. The eggs are deposited singly on the upper sides of 

 the leaves of a species of ground huckleberry, its food plant. 

 The egg is spindle-shaped, with low longitudinal and transverse 

 ridges which divide the surface into shallow, rectangular paral- 

 lelograms; it measures 1.3X.6 millimeters. The last stage of 

 the caterpillar (there are five) has a pinkish-white dorsal line, 

 very narrowly black-bordered, running the whole length of the 

 body. The ground color is probably some shade of green in 

 living specimens; with two or three other lines on the body 

 parallel with the first mentioned. The chrysalis appeared to 

 have been yellowish-green, with a lateral pale line on the 

 abdomen. 



The specimens of the butterfly collected by the State Geo- 

 logical Survey I saw in Dr. Behr's collection in the museum 

 of the California Academy of Sciences of San Francisco in 

 1902 ; these were destroyed in the fire of 1906. Edwards' types, 

 from Dr. Behr, also collected by the Survey, are in the Car- 

 negie Museum, Pittsburg, Pennsylvania. Dr. Strecker also 

 received specimens from Dr. Behr ; his collection is in the Field 

 Museum of Natural History, Chicago. 



I hope this account of an extremely interesting butterfly will 

 arouse the curiosity of a few Sierra Club members sufliciently so 

 that they will be led to look for this butterfly during the coming 

 summer trip, and add to our really meager knowledge of the 

 habits and distribution of Behr's Sulphur, which has survived 

 the changes of climate and its harsh environment ever since 

 the glacial epoch; isolated from its relatives in Labrador and 

 Arctic America and Europe for a long enough time to enable 

 it to assume an entirely distinct appearance. 



"I am a part of all that I have met." 



[If there are any members of the Club who would like to 

 know how to capture and preserve butterflies, so that they can 

 add to our knowledge of this species, the writer would be glad 

 to give the needed information if they will write to him at 

 Pasadena.] 



