10 



The females, which are on the wing in late autumn, have the under 

 side of the hind wings much more deeply suffused with red than do those 

 which fly earlier in the season. 



16. (66.) COLTAS EUKYTHEME, Bd. The Eury theme Butterfly. The 



Orange Sulphur. 

 Colias eurytheme, Morris, Lep. N. A., 1862, 29. 



Edwards, But. N. A., I, 18H9, 45, pi. 14. 



Id., But. K A., II, 1884, 103, pi. 21. (All 



forms.) 



Mead, Rep, Wheeler Exp., v. 1875, 748. 

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

 Id., But. E. U. S., 1886, 128. (All forms.) 

 Blatchley, Ind. Farmer, Oct. 9, 1886. 

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



1126; III, pis. 15, 25, 65, 76, 84. 

 Colias keewaydin, Edw., But. N. A., I, 1869, 49,-pl. 15. 

 Colias amphidusa, Morris, Lep. N. A., 1862, 29. 

 Colias edusa, Id., loc. cit., 27. 

 Colias chrysotheme, Id., loc. cit., 28. 



The two forms, eurytheme, Bd., and keewaydin, Edw., occur occasion- 

 ally in various parts of the State, but are nowhere common. Keewaydin 

 was taken by the writer in Monroe County, in 1887, and eurytheme in 

 Putnam County in 1890. 



It winters, according to Edwards, in both imago and pupa stage, fre- 

 quents meadows and roadsides, and is most common in July. Food plant, 

 white and buffalo clover. 



' 17. (68.) COLIAS PHILODIOE, Godt. The Sulphur Yellow Butterfly. 

 Colias philodice, Harris, Ins. luj. to Veg., 1862, 272, figs. 100-102. 

 Morris, Lep. N. A. , 1862, 29. 

 French, Sev Rept. State Ento., 111., 1878, 147. 

 Id., But. E. U. S., 1886, 133. 

 Packard, Guide, 8th Ed., 1883, 250. 

 Edwards, But. N. A., II, 1884, 93, pis. 1H, 20. 

 Blatchley, Ind. Farmer, 1886, Oct. 9. 

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



1111; III, pis. 7, 13, 25, 65, 76, 84. 



This is, without doubt, the most common butterfly in the State, being 

 found in abundance from April 10 to November. In May and June 

 they frequent fields of clover, upon which plant the larvje feed, but later 

 on they congregate by hundreds about muddy places in the roads, and 

 along stream?. The white female form is often seen, but is much less 

 common than the yellow. 



