BUTTERFLIES OF THE DISTRICT OF COLUMBIA 227 



are lacking, and on the hind wings the line in the last subcostal 

 interspace and the first 2 of the 4 discal dashes are vestigial. Doctor 

 Holland's figures show the typical brownish northern male together 

 with the t,ype of female found at Beltsville, though with the yellow 

 spots darker and very slightly larger. 



Mr. Scudder's description, except for the account of the markings 

 on the upper side of the female, fits rather the southern than the 

 1 orthern form. Doctor Holland described the underside of a north- 

 ern male and the underside of southern females, his descriptions 

 therefore agreeing with his figures. 



Mr. Scudder did not give the localities of the specimens which he 

 described, but the size he gave for both sexes agrees with the size of 

 individuals from Beltsville, individuals of both sexes from Weston 

 having the fore wings only 13 mm. long. In other cases (as, for 

 instance, in the case of Argynnis iclalia) his measurements show that 

 his material came from localities south of Boston, and this seems to 

 have been true, in part at least, in regard to this species. Apparently 

 he was not acquainted with this skipper in life. 



Under the name suffiisa Philip Laurent has described a form of 

 this butterfly (pi. 53, figs. 11, 12) from the vicinity of Philadelphia. 

 He says : 



The variation consists principally in the yellow markings of the under sur- 

 face of the posterior wings being almost obliterated by a suffusion of dark 

 brown, the light colored margin found in the normal form being entirely want- 

 ing. About 1 in every 10 specimens will be found to be suffusa. The varia- 

 tion is generally found among the males, but more sparingly where it occurs in 

 the females. The insect is without the usral yellow spots on the upper surface 

 of the wings. 



A specimen of su-ffusa at hand from New Jersey (pi. 53, figs. 11, 

 12) shows that this form is quite different from hughi. The entire 

 lower surface of the hind wings is suffused with, and the whole color 

 pattern is obscured by, dark rusty brown. In hughi the suffusion 

 of rusty brown restricts the extent of but does not obliterate the 

 bright yellow markings. 



A somewhat similar state of affairs is found in Satyrodes eurydice^ 

 occurring in the same bog, which is uniformly darker here than about 

 Boston, although the very dark form known as fwmosus does not 

 occur. 



Notes.— A male taken on July 26, 1931, has the yellow markings 

 on the underside of the hind wings reduced to a row of four small 

 spots less than twice as long as broad parallel to the outer margins 

 of the wings, another slightly shorter spot in the interspace above 

 the topmost of these spots with its outer end half its length farther 

 from the edge of the wing than the inner end of the spot just below, 

 and a very small yellow spot in the cell. 



