186 BIOLOGICAL SURVEY OF 



B. ARTHEMis Dru. form prosperphsta Edw. (321). One specimen 

 was taken at Echo Lake, July 17, 1918. This form, which 

 is common in the Berkshires and Catskills, is considered a 

 hybrid between the more southern B. astyanax and the 

 northern B. arthemis. If so, the former must occasionally 

 reach Mt. Desert. In discussing- the probable occurrence of 

 prosperpina at Halifax, Nova Scotia, Mr. Scudder says: ''It 

 is not at all improbable that Ursula (astyanax) may yet be 

 found as far north as Mt. Desert, and that colonies of 

 prosperpina are now living along the whole coast of Maine." 

 (See Butterflies of New England, vol. 1, p. 291, 1889.) 



B. ARCHippus Cram. (325). The Viceroy. Not common. Bar 

 Harbor, Aug. 15. The larva feeds on willow and poplar. 



Lycaenidae 



Steymon Hiibner 



S. MELiNus Hbn. (373). Hulls Cove, June 12; Mt. Desert, 

 May 22-Aug. 2 (Br.). 



S. EDWARDSii Saund. (385). Mt. Desert, Aug. 9 (Br.). 



S. CALANUs Hbn. (386). The Banded Hair-streak. Bar Har- 

 bor (Br.); Eden, July 18-24. The larva feeds on oak and 

 thorn (Crataegus). Scarce. 



Incisalia Scudder 



I. AUGUSTUS Kby. (403). Brown Elfin. Eden in June. 

 I. POLIOS Cook & Wat. (409). Mt. Desert, June 25 (Br.). 

 I. NiPHON Hbn. (413). Banded Elfin. 'Mt. Desert' (Scudder). 

 The larva feeds on pine. 



Erora Scudder 



E. LAETA Edw. (418). Bar Harbor, May 19 (Br.). 



Feniseca Grote 



F. TARQuiNius Fab. (419). The Wanderer. Near Bar Harbor 

 (Burton). The larva is carnivorous, feeding on the woolly 

 aphids ProcipJiilus tessellata on the alder and P. imbricator 

 on the beech. 



