Genus Terias 



land, the far North in British America and Alaska, and on the 

 summits of the Rock}' Mountains in British Columbia. 



(ii) Colias behri, Edwards, Plate XXXVI, Fig. 17, 6 (Behr's 

 Sulphur). 



BiitfcrJJj'. — This very rare little species maybe easily recognized 

 by the dark-greenish tint of the upper side of the wings and the 

 light spot on the upper side of the hind wings. The female has 

 the outer borders dusky like the male, the dusky shade running in- 

 ward on the lines of the veins and nervules. Expanse, 1.50 inch. 



Early Stages. — We know little of these. 



The insect has hitherto been taken only at considerable eleva- 

 tions among the Western Sierras, and the peaks and lofty mea- 

 dows about the Yosemite Valley have been until recently the 

 classic locality for the species. 



There are a number of other species of the genus Colias, and 

 numerous varieties which have been named and described from 

 the western and northwestern portions of our region; but it re- 

 quires almost as much skill to distinguish them as is required to 

 discriminate between the different species of willows, asters, and 

 goldenrods, among plants, and we do not think it worth while 

 to burden the student with an account of these, and of the con- 

 troversies which are being waged about them. If any reader of 

 this book becomes entangled in perplexities concerning the species 

 of Colias, the writer will be glad to try to aid him to correct con- 

 clusions by personal conference or correspondence. 



Genus TERIAS, Swainson 

 (The Small Sulphurs) 



"Hurt no living thing : 

 Ladybird, nor butterfly, 

 Nor moth with dusty wing, 

 Nor cricket chirping cheerily, 

 Nor grassliopper so liglit of leap, 

 Nor dancing gnat, nor beetle fat, 

 Nor harmless worms tiiat creep." 

 Christina Rossetti. 



Butterfly. — Small butterflies, bright orange or yellow, mar- 

 gined with black. They are more delicate in structure and have 

 thinner wings than most of the genera belonging to the subfamily 



294 



