PIERINAE: EURYMUS EURYTIIEME. 1131 



valley it occurs sparinarly and disappears entirely at tiic Alleghanies with 

 the few exceptions wliicli we sliall shortly note. In the Mississippi valley, 

 which it shares with piiilodice, it is the prevailing species of the two. It 

 occurs throughout the entire Rooky Mountain district below timber line, 

 above which it is rarely seen (Mead, Snow), though Packard reports a 

 capture as higii as 12,000 feet on Arapahoe Peak. 'I\) the north its boun- 

 daries are somewhat uncertain, l)ut it extends as far on the Pacific coast 

 as \'ancouver"s Island (H. Edwards), and to the eastward to Dakota 

 (Allen), Milk River, Montana (Coues), Lake of tlie Woods (Dawson), 

 Nepigon, north of Lake Superior (Fletcher), Sault St. Marie "not un- 

 common" (Betiuuic), Moose (Weir), and Albany River, Hudson Bay 

 (Iiarnston, Pritisii Museum), and a specimen has even been reported from 

 the Athabasca region as taken by GeiFcken (Strecker). To the east, west 

 of the Alleghanies, it seems to have followed down the St. Lawrence 

 valley, for it is reported from Michigan (Edwards), Bruce Mines, one 

 specimen (Bethune), London, Ont., "occasionally" (Saunders), St. 

 Catherine's Ont., "very rare" (Saunders), Montreal, one specimen 

 (D'Urban, Pearson). Quebec (Thaxter), about twenty miles below 

 Quebec, one specimen (Bowles), Missiquoi Co., P. Q. (Fyles), and Al- 

 bany, N".. Y. (Bailey). Its southern boundaries extend from southern Cali- 

 fornia, San Diego (H. Edwards), through Arizona (Morrison) to southern 

 Texas (Aaron, Lintner), New Orleans, La. (Edwards) and Oxford, Miss. 

 (Edwards) ; in southern Ohio Dury says it is rare. Mr. Grote saw 

 only a single specimen in Alabama and Gosse does not mention it from 

 that state. East of the Alleghanies it has occasionally appeared, as in 

 Newcastle, Del. (Reakirt), ^Maryland "once" (Uhler), and Georgia 

 (Abbot). 



Single specimens have also been taken a few times in New England : 

 namely, in Norwich, Conn. (McCurdy), Wollaston (F. H. Sprague) and 

 Belmont, Mass. (Maynard), Montpelier, Vt. (P. S. Sprague) and Mt. 

 Desert, Me., "a single specimen seen" (Thaxter). 



As regards the distribution of the different forms, keewaydin and am- 

 phidusa with their })allid females appear to range as widely as the species ; 

 the yellow forms, however, eriphyle and ariadne, divide the field between 

 them, perhaps about equally, though it would appear as if ariadne were 

 the more wide-spread. Indeed they overlap and mingle in some places. 

 Ariadne extends north to Vancouver Island on the Pacific coast, to central 

 Colorado in the Rocky Mountain region, and to Nebraska and Illinois in the 

 Mississippi valley where it begins to assume a form approaching eriphyle. 

 Eriphvle, on the other hand, reaches south on the Pacific coast as far as 

 southern California, to southern Colorado in the Rocky Mountain region 

 and apparently about to the head waters of the Mississipj)! in the eastern 

 part of its range. 



