604 



THE BUTTERFLIES OF NEW ENGLAND. 



the former, is a narrow, rather faint and ill-defined band of rosy white scales, largest, 

 and inclining to silvery white above, barely seen to be formed of Innules opening out- 

 ward ; fringe as on upper surface. 



Abdomen blackish broAvn above, covered with long, fulvo-olivaceous hairs, becoming 

 thicker and more fulvous toward the tip; the sides, especially toward the tip, 

 besprinkled with fulvous scales ; beneath dull ochraceous buff, mingled, next the black 

 of the sides, with a few fulvous scales. Upper organ of the male appendages 

 (33:41,42) with the hook moderately curved, rather shorter than the centrum, very 

 deeply and sharply bifld, the points aculiform. Clasps nearly twice as long again as 

 broad, exclusive of the processes, tapering rapidly to the base of the lower one, Avhich 

 is slender, equal, apically incurved, depressed and nearly as long as the median width 

 of the blade; upper process of similar length, straight, equal, exceedingly slender, 

 delicately tumid apically. 



Described from 2 3,1?. 



Secondary sexual distinctions. A slight difference in the ueuration of the hind 

 wing is found here as in other species of the genus, for Avhich see the generic de- 

 scription. 



Egg (64 : 38). About twenty-live vertical ribs, of which the greatest number reach 

 the summit, the others uniting with those beside them, mostly above the middle of 

 the eo-g, which is less flask-shaped than in the other New England species; inter- 

 spaces between broken by cross lines about .04 mm. apart. Micropyle rosette (67 : 16) 

 .15 mm. in diameter, composed of roundish, angular cells, increasing in size from the 

 central cell, which is .0085 mm. in diameter, outward, those next the centre being 

 about .017 mm. in diameter, and the outer .035 mm. Color of egg pale yellow. 

 Height, 1.15 mm. ; breadth about .8 mm. 



Comparisons. This species is certainly tlistingiiishable from B. 

 cliariclea (Schneid.) or B. chariclea boisduvalii (Somm.), both of 

 which forms have been found by Mr. Couper on the northern shore of the 

 Bay of St. Lawrence. Whether it should be looked upon merely as a 

 o-eoo-raphical race, or as a species, is a question about which there may 

 be easy difference ; that it can be separated in some form admits of no 

 doubt, and is the really interesting point. It is most closely allied to 

 B. chariclea boisduvalii, but differs from it in the following particulars : 

 The upper surface of the wings is deeper in tint, the base of both more 

 extensively, though not more deeply begrimed; beneath, both wings are 

 deeper in tint and the markings of the latter differ somewhat, the broad, 

 intra-mcsial band being, in B. c. boisduvalii, more generally suffused with 

 ochraceous scales, making it, as a whole, more strongly contrasted with 

 the rest of the wing ; beyond the band the rosaceous scales are, in the 

 same variety, more generally distributed over the whole space intervening 

 between the band and the series of round spots, giving the wdiole a suf- 

 fused lilac blush, while in the present species they are confined to a trans- 



