NORTH AMERICAN BUTTERFLIES. 
31. Occidentalis, Reak. 
winter form Calyce, Edw. 
summer form Occidentalis, Reak. 
32. Protodice, Bd. 
winter form Vernalis, Edw. 
summer form Protodice, Bd. 
33. Napi, Esper. 
arctic form Bryonre, Ochs.; Edw., Papilio, 1, 86, pi. 2, f. 4, 1881. 
Alaska. 
var. Hulda, Edw., 1. c., pi. 2, f. 5. 
1. winter form Venosa, Scud.; Edw., 1. c., pi. 2, f. 6. 
aberr. Flaya, Edw., 1. c., 98. California. 
2. winter form Oleracea-hiemalis, Harr.; Edw., 1. c., pi. 2, f. 8. 
var. Borealis, Grote; Edw., 1. c., pi. 2, f. 9. 
var. Frigida, Scud. 
aberr. Virginiensis, Edw. Northern. 
3. 1. summer form Acadica, Edw., I. c., 87, pi. 3, f. 10, 11. New¬ 
foundland. 
2. summer form, a . Pallida, Scud.; Edw., 1. c., pi. 3, f. 12, 13. 
b. Castoria, Reak. $ ; Edw., 1. c., pi. 3, f. 14. 
aberr. Flaya, Edw., 1. c. 94. California. 
3. summer form Oleracea-^estiva, Harr.; Edw., 1. c., pi. 3, f. 15,16. 
34. Virginiensis, Edw., But. N. A., v. 1, 34, pi. 9; id., Papilio, 1, 95, pi. 3, f. 
17, 18. West Virginia. 
35. Rapae, Linn. 
var. Manni, Mayer; Stet. Ent. Zeit., 1851, p. 151. West Virginia; 
Georgia. 
var. Nov.-Angli.e, Scud. 
NATH A LIS, Boisduval. 
36. Iole, Bd. 
var. Irene, Fitch. 
ANTHOCHARIS, Boisduval. 
Group I. 
37. Lanceolata, Bd. 
38. Creusa, Doubl. 
Group II. 
