110 BUTTERFLIES 



agarithe). Expanse 2| inches. Distinguished at once by 

 its uniform orange-yellow color. 



Dog's-head Butterfly {Zerene caesonia, Colias caesonia or 

 Meganostoma caesonia). Expanse 2 J inches. Upper sur- 

 face yellow with black inner and outer borders on front 

 wings and black outer border on hind wings. The black 

 and yellow of each front wing so combined as to make a 

 distinct dog's head with black eye. 



Clouded Sulphur {Eurymus philodice or Colias philodice). 

 Expanse 2 inches. Upper surface sulphur yellow with 

 blackish borders, the yellow brighter in the male than in 

 the female. Male with line between yellow and black 

 distinct, a black spot just in front of the middle of each 

 front wing and an orange spot near the middle of each hind 

 wing. Under surface of male deeper yellow, with spots as 

 on the upper surface but without black margin, and with a 

 row of sub-marginal brownish dots on each wing. Female 

 with upper surface more generally suffused between mar- 

 ginal mark and the yellow part with more or less duskiness 

 both above and below. Spots on each wing much as in 

 male. In the white form of the female (pallidice) the 

 yellow is replaced by white. 



Pink-edged Sulphur (Eurymus interior). x\t once dis- 

 tinguishable from philodice by the narrow pink edge of all 

 the wings, showing both from above and from below, 

 slightly smaller as a rule. 



Orange Sulphur (Eurymus eurytheme or Colias eury^ 

 theme) . Expanse 2| inches. Much like Clouded Sulphur 

 in markings except that prevailing color-tone is orange 

 yellow. 



Black-bordered Sulphur (Eurema nicippe, Xanthidia 

 nicippe or Terias nicippe). Expanse 2 inches. Upper 



