894 



rilK lUITTERFLIES OF NEW ENGLAND. 



dantly ^scattere(l caerulean scales on a dark Kroiiml ; outer border of both wings 

 marked narrowly with blacki.sh brown, on the hind wings and often on the lower por- 

 tion of the fore wings, followed interiorly by a line of white scales; a black spot at 

 the extreme an.al angle, following the line of white scales on the lower median inter- 

 space; fringe and tails as in T. calaniis, except in being of the general color of the 

 wings. 



Abdomen above of tlie color of the upper surface of the wings; at the sides gray- 

 ish and beneath dirty white; alations of upper organ of male appendages (34 : 14) 

 well rounded, the lower edge almost straight; clasps straight tapering slightly beyond 

 the gibbous base. 



Described from 62 (J , 38 9 . Longer tails varying in length from 1.75 to 3.25 ; aver., i 2.1, 9 2.75. 



Secondary sezual distinctions. See description of fore wing for the appear- 

 ance of tlie male stigmi. Tlie scales found there (46:20) are ribbon-like, scarcely 

 tapering, the sides being parallel, the tip well rounded and hardly angulated, while 

 the base is angulated, equally on both sides; the lamina, exclusive of the stem, is a 

 little more than three times as long as broad, and differs from that of T. c.alanus in 

 its greater slenderness and the inequality of form of the two extremities. 



Egg (65:2). Prominences very high, smooth-tipped, .064 mm. apart, .025 mm. in 

 diameter, the ridges rather slender, uniform, abrupt, .0085 mm. thick; pits angular, 

 and .at most .025 mm. in diameter, the bottom marked as in T. calanus ; at the 

 summit assuming much more the appearance of pits, occupying scarcely more than 

 half the otherwise uniform surface. Micropyle rosette (68:2) .07 mm. in diameter, 

 composed of a minute central circle, surrounded by four oval cells, directed toward 

 it, their longer axes .03 mm. long and their shorter half of that. Height, .44 mm. ; 

 breadth, .82 mm. 



This egg may be distinguished from that of tlie preceding species by the smoothness 

 of tlie tips of the prominences and their greater distance apart; also by the nature of 

 the interspaces, which are not circular pits, as in that species, but agree better with 

 the similar parts in Incisalia. 



Caterpillar. Fourth stage. Head shining pitchy black, the base of the triangle 

 with a white or pellucid narrow band. 



Body scarcely tapering in advance of the seventh abdominal segment, the extremity 

 very bluntly pointed ; grizzly brown, marked with dull, dirty pale yellowish brown ; dor- 

 sum of the first thoracic segment and a dorsal stripe, excepting on the anterior edge 

 of the second thoracic segment, grizzly brown, the stripe distinctly bordered as far as 

 the seventh abdominal segment, narrowing posteriorly ; the I'est of the body above dull 

 dirty pale yellowish, the sides of each segment with a short and broad oblique streak 

 of grizzly brown, the upper edge only of which is well deflned because faintly bor- 

 dered with dirty whitish ; the ventrostigmatal fold is paler than the upper surface 

 and is bordered above with a very indistinct band of obscure yellowish brown : under 

 surface of body pale, dull, bluish green; warts blackish and their hairs pale brownish, 

 giving the body a speckled appearance; the second and third thoracic and the first to 

 third abdominal segments have each three blackish spinous hairs in the laterodorsal 

 row, the middle tlie longest; the fourth to seventh abdominal segments have two 

 each, of equal length; spiracles whitish encircled with dark brown; legs pale green- 

 ish, iufuscated externally. Prolegs pale, dull bluish green. Length, 5.5 mm. ; breadth, 

 1.5 mm. 



Last star/e (75 : 25) not differing from the previous. Length, 9.25 mm.; breadth, 

 3 mm. 



