BUTTERFLIES OF THE DISTRICT OF COLUMBIA. 187 



narrowly linear and bright. The yellow submarginai lunules on 

 the hind wings vary from strongly crescentic to practically linear in 

 both localities, and the series of submarginai yellow spots in the 

 black border of the fore wings varies from a series of narrow dashes 

 to a series of well-rounded oval spots. 



On the underside of the fore wings the males from Boston (pi. 34, 

 fig. 2) frequently have the submarginai yellow spots united in a 

 continuous band with straight edges, which is as wide as the black- 

 margined olive-gray band just within it. Sometimes this band is 

 crossed by narrow black veins, and its inner border is slightly in- 

 dented where these veins enter. Usually the band is narrower than 

 the olive-gray band, sometimes scarcely half as wide, and is crossed 

 by conspicuous black veins, the margin where these veins enter being 

 deeply, though narrowly, notched. Exactly this condition is fre- 

 quent in specimens from Washington. Here, however, the notches 

 at the entry of the veins are as a rule broader and deeper and the 

 black scaling on the veins is broader, so that instead of a band there 

 is a series of isolated yellow spots, at the apex half moon shaped but 

 rapidly decreasing in width and becoming linear and widely sepa- 

 rated posteriorly. 



On the hind wings in specimens from Boston (pi. 34, fig, 1) the 

 black abdominal border is usually somewhat broader than the yellow 

 interspace between it and the cell, but in some cases it is more or 

 less considerably narrower. In specimens from Washington (pi. 33, 

 fig. 1) this black abdominal border is always narrower than the 

 yellow interspace between it and the cell, though occasionally not 

 much so. 



On the underside of the hind wings in specimens from Boston 

 (pi. 34, fig. 2) the limbal area is as a rule, though not invariably, 

 much lighter in color than in si^ecimens from Washington (pi. 33, fig. 

 2), because of a greater development and more uniform distribution 

 of blue-gray scales, while the narrow black inner border of the limbal 

 area as far as vein R3 is made up of a continuous series of straight 

 lines instead of being composed of a series of curved lines as in the 

 case of specimens from Washington. Occasionally these lines are 

 slightly curved, while they may be nearly straight in examples from 

 Washington. 



Summing up the characters of the males from Boston and from 

 Washington, there is an appreciable average difference in color, with, 

 however, broad overlapping. Only in features of the limbal area 

 of the underside of the hind wings, the general color and the line 

 forming its inner border, do the groups of males approach each other 

 without an overlap. 



About Boston there are ochreous and short-winged males exactly 

 corresponding to similar males in the vicinity of Washington. 



