900 THE BUTTERFLIES OF NEW ENGLAXD. 



Secondary sexual distinctions. See descriptiou of fore -vviiig for appearance 

 of the stigma. The scales of the same (46 : 21) very closely resemble those of T. 

 calaims, bcins less than four times as long as broad, subequal, broadly rounded at the 

 tip, l)ut with the sides of the base slightly lobed. 



Egg (65 : 1). Closely resembling that of T. calanus, but scarcely so high, and with 

 somewhat deeper micropylic pit: prominences slender, tapering, truncate, much 

 farther apart than their own height, uniform in elevation, about .015 mm. thick at tip; 

 the cells are subcircular, averaging .0-1 mm. in diameter, reckoning from the centre of 

 the walls ; the micropyle pit is .06u mm. in diameter. Height of egg, .4 mm. ; breadth, 

 .72 mm. 



Caterpillar. Last stage (75: Ifi-18). Head (79: 25) shining, very pale greenish 

 brown, the lower half of the triangle fuscous; antennae with the basal joint white, 

 the apical reddish; ocelli white in a blackish field: labrum and mandibles reddish 

 brown. 



Body grass green, deepest on the dorsal area, more or less distinctly marked with 

 whitish. First thoracic segment with two faint, pale greenish laterodorsal lines and 

 on either side two oblique lines, inclined from above backward and downward, the 

 upper as indistinct as the laterodorsal line, the lower tinged with yellow; behind this 

 segment the body is similarly marked ; there is a pair of very distinct laterodorsal 

 white lines, approximating a little at the anterior extremity but otherwise parallel, 

 extending distinctly as far as the end of the seventh abdominal segment and indis- 

 tinctly to the tip of the body ; there is a distinct lemon yellow, sometimes whitish, 

 infrastigmatal line, commencing with the distinct band of the first thoracic segment 

 and extending to the tip of the body ; on the sides of the body between these two 

 lines there are on each segment two fainter, narrower, obliqne, whitish lines, the lower 

 in broken continuation with the upper of the pi'eceding segment; beneath uniform 

 green; hairs white or colorless, straight or slightly curved, the longer two or three 

 times longer than the shorter, those of the first thoracic segment brownish. Spiracles 

 pale brownish encircled with pale. Legs very pale greenish, the claws fuscous at tip; 

 prolegs green, their apices colorless. Length, 16 mm. ; breadth, i mm. ; height, 3.75 

 mm.; length of lateral hairs .28-. 44 mm. ; length of other hairs, .16 mm. ; of apical 

 bristle of antennae, .2 mm. 



In younger specimens the lateral oblique stripes are obscure and in the oldest ones 

 there are sometimes three instead of two on a segment. 



Chrysalis (84 : 85). Upper surface dull yellowish brown, obfuscated with blackish 

 brown spots which are scattered over the whole surface, collected into obscure 

 dusky stripes on the sides of the abdoininal segments, which curve around behind 

 the spiracles, and are wanting along the narrow obscurely yellow subdorsal lines ; a 

 black dorsal line on the thorax and a dusky dorsal stripe on the abdomen. Under 

 surface and wings greenish plumbeous, dotted abundantly with blackish spots, the 

 posterior border more or less obscured ; the network of interlacing ridges is composed 

 of ratlier larger cells than in most of the other species, covering most of the body, as 

 distinct on the sides as on the back, and is furnished at all points of intersection with 

 little wiirts ; the hairs are pretty abundant, moderately long, about one-half as long 

 again in front as on the sides, bluntly rounded at tip, their spicules at the most not more 

 than one-third of the diameter of the spine in length, and directed considerably for- 

 ward so as to give the sides of the spine a sharply serrate appearance. Hairs erect on 

 the thorax, somewhat recumbent on the abdomen; thoracic spiracle white, others 

 yellowish brown. Length, 10.5 mm. ; breadth, 4.5 mm. ; height, 4.5 mm. ; height of 

 hairs on front, .28 mm. ; on .sides, .2 mm. 



Distribution (24:4). Tliis butterfly apparently occurs in tlie east only 

 iu the vicinity of the boundary line of the Canadian and Alleghanian fau- 

 nas, l)ut principally in the latter, in a narrow belt stretching from the 

 Atlantic to Montana. But it also occurs in a hardly distinguishable 



