Vanderburgh County, by Evans. "This pretty species is single 

 brooded and flies in spring. The eggs are laid upon the species of 

 Cardamine and other Cruciferce, but the life history of the larvae is not 

 well known. It flies low and swiftly, with a peculiar tremulous motion, 

 and is readily distinguished from other Pierids by its flight as well as by 

 the conspicuous coloring of the male." EDWARDS, loc. cit. 



CALLIDRYAS, Boisduval. 



13. (54.) CALLIDRYAS EUBULE, Linn. The Danewort Butterfly. 



The Cloudless Sulphur. 

 Callidryas eubule, Morris, Lep. N. A. , 1862, 25. 



French, Sev. Rep. St. Ento. 111., 1878, 147. 



Id., But. E. U. S., 1886, 119. 



Scudder, But. E. U. S. and Can., 1889, II, 



1053 ; III, pis. 15, 25, 65, 76, 84. 



A beautiful butterfly, whose range is southern, and which is reported 

 only from Vanderburgh County, where Mr. Evans takes from one to a 

 half dozen almost every season, in open woods during July and August. 

 Food plant, the different species of Cassia or Wild Senna. 



14. (56.) CALLIDRYAS PHILEA, L. 



Callidryas philea, Morris, Lep. N. A., 1862, 350. 



(Note by W. H. Edwards.) 

 French, But. E. U. S., 1886, 124. 

 Scudder, But. E. U. S. and Can., 1889, III, 



1833. 



A single specimen of the above species has been taken in Jefferson 

 County by Mr. Hubbard. It has been reported heretofore only from 

 Texas, Illinois and Wisconsin. 



COLIAS, Fabricius. 



15. (62.) COLIAS CAESONIA, Stoll. Dog's Head Butterfly. 



Colias caesonia, Morris, Lep. N. A., 1862, 27. 



French, But. E. U. S., 1886, 127, fig. 32. 

 Zer&ne caesonia, Scudder, But. E. U. S. and Can., 1889, III, 



1836. 



This beautiful Colias has been taken only along the western border of 

 the State. It is reported as frequent in Vanderburgh and Lake 

 counties. In Vigo County, in the latter half of October, 1887, three 

 or four specimens were taken from the vicinity of ponds in the Wabash 

 River bottoms, but it has not been seen since. The larvae feed upon 

 clover, and false indigo, Amorpha fruticosa L. 



