EASTERN UNITED STATES. 127 



cept that there is more yellow at the apex, and the costal 

 margin is yellow-tinted. The hind wings uniform pale 

 yellow, heavily sprinkled with whitish or slightly buff- 

 tinted scales, giving the wing a slight grayish cast ; a 

 few brown scales on the middle of the cross-vein. 



Summer form, Teeissa, Luc, is like the winter form 

 above, except that there is a bronzy black bar about .15 

 of an inch long on the hind wings from the costa back 

 about two-thirds the distance from the base. The under 

 side of fore wings the same, but the hind wings are more 

 yellow-tinted, lack the whitish scales, and the brown on 

 the cross-vein is more distinct. 



Texas ; Indian River, Florida. 



23. Colias C^sonia, Stoll. 



Expanse of wings from 2.25 to 2.5 inches. 



Upper surface yellow, with a broad terminal border, 

 the inner part bent inward along the costa, and making 

 a deep sinus between the second discal and the second 

 median venule. The base of the wing has a heavy 

 shading of black scales, the anterior portion extending 

 half-way across the wing, and from the median vein to 

 the costa. This leaves the yellow portion somewhat 

 resembling a dog's head, the discal dot answering for an 

 eye. Hind wings with a narrow black border, dentate 

 on the inside ; an orange discal spot, and a smaller one 

 just outside the cell. 



In the female the yellow of the fore wings is more 

 encroached upon by the black basal shading, with a 

 sprinkling of black atoms over the "dog's head," and 

 rays of black between the veins of the hind wings. 

 There is also a slight blue reflection over the "dog's 



