THE MOUNT DESERT REGION 21 I 



P. giatjcus f orm turnus Linn. (15). Tiger or Yellow Swal- 

 lowtail. Common in June and early July. The larva feeds 

 on a variety of plants, including- cherry, apple, quince, ash, 

 birch, alder, poplar, etc. There was a tremendous hatch in 

 June, 1935 on the Island and I saw more individuals in one 

 week than in the entire fifteen years before. Some indi- 

 viduals could be referred to race canadensis R. & J. 



Colias Fabricius 



C. eurytheme Bdv. (41). Orange Sulphur-butterfly. A west- 

 ern species, formerly rarely recorded in New England, 

 became fairly common in 1936-38 and since then found 

 regularly. Specimens lightly marked with orange are rela- 

 tively rare. Most individuals being rather heavily marked, 

 but not large or deeply colored. 



C. EURYTHEME Bd\ T . form ARIADNE Edw. (41). 



0. philodice Godt. (42). Clouded Sulphur-butterfly. Com- 

 mon, July-Sept. The larva feeds on a number of the Legumi- 

 nosae, but prefers the clovers. 



C. interior Scud. (45). Pink-edged Sulphur-butterfly. Some- 

 times quite common throughout the Island in July. The 

 albino taken at S. W. Harbor, July 24 (Br.). 



Eurema Hubner 



E. eisa B. & L. (72). Little Sulphur-butterfly. "One in ex- 

 cellent condition was taken on Mt. Desert, Me., by Mr. 

 Roland Thaxter in August, 1880" (Scudder). Bar Harbor, 

 Sept. 3, 1934 (Br.). 



Pieeis Sehrank 



P. napi Linn. gen. vern. oleracea Hair. (83d). White Mus- 

 tard-butterfly. Rare. Near Newport Mt. (Reich and Bur- 

 ton). Formerly common throughout northern New England, 

 but. since the introduction of Pieris rapae, it has become 

 comparatively scarce, probably owing to parasites. The 

 larva feeds on mustard, cabbage, turnip, and other 

 Cruciferae. 



