216 



THE BUTTERFLIES OF NEW ENGLAND. 



the hook, somewhat arched and curved a little inward, the apex directed downward. 

 Clasps broad at the ba.se, three times as long as broad, rapidly tapering from just be- 

 fore the middle to the middle of the outer two-thirds, by the upward sloping of the 

 lower margin, wdiile the latter is at the same time slightly arched, the apical third not 

 oue-quarter the width of the base, equal but pointed at the tip, Avhere it is strongly 

 incurved and armed with a few scarcely perceptible prickles ; there is a slight lateral 

 inward expansion of the upper edge, just before the apical third of the clasp. 



Secondary sexual peculiarities. For the androconia, see the generic description. 



Egg (64: 5, 11). Very pale yellowish green, almost white; cells on the upper half 

 averaging about .042 mm. in diameter, separated by raised lines .0085 mm. in width, 

 the surface of the cells perfectly flat and pretty smooth ; the micropyle is about .13 

 mm. in diameter, and the average diameter of the cells composing it is about .019 

 mm.; height, .9 mm., greatest diameter, .88 mm. 



Caterpillar. First stage (70:4). Head (78:25) pale greenish castaneous, the 

 ocellar spot dusky ; mouth parts pale, hairs dusky. Body pale brown with a greenish 

 tinge, the dorsal, lateral, stigmatal and suprastigmatal stripes roseate, or yellowish 

 brown Avith a pinkish hue ; suprastigmatal stripe broader than the others which are 

 equal and slender. Legs and prolegs concolorous with body ; spiracles pale, with a fus- 

 cous annulus ; hairs (86 : 40) pale brown, paler at clubbed tip. Length 3.5 mm. 



Second stage (7§:2C>). Head rounded subquadrate, broadest at upper limit of eye- 

 specks, with tubercles as in first stage but proportionally smaller ; color pale watery 

 brown, narrowly banded, longitudinally behind and above, transversely in front, with 

 very pale yellowish brown, which is the color also of the coronal tubercles; the scat- 

 tered tubercles are pallid and give rise to mingled pale and black hairs ; the sutures 

 are marked in rust-brown, the ocelli are black; labrum black edged; mandibles edged 

 ■with castaneous deepening to black ; antennae pale yellowish brown with a long color- 

 less bristle. Body dull and rather pale green, studded with small pallid tubercles 

 (86:42) of two sizes, one about three times as large as the other, arranged in trans- 

 verse rows, each giving rise to a short, pale or dark hair, and adorned with longitudinal 

 stripes corresponding exactly to those of the first stage; viz., a dorsal dark olive 

 green stripe deepening to purplish browai posteriorly; a very slender, lateral, reddish 

 brown line edged below with yellowish, which extends upon the sides of the caudal 

 forks, and below scarcely separated stigmatal and substigmatal bauds of same color, 

 the latter edged beneath at the fold with yellowish. Caudal forks as long as the last 

 segment. Stigmata minute, blackish. Length, 6.5 mm. ; breadth of head, .85 mm. 



Third stage (78:27). Diflers from preceding stage only in size, the length of the 

 caudal horns, and the slightly intensified coloring and contrasts of the bands. Length, 

 8.5 mm. ; of caudal horns, .4 mm. ; breadth of body. 1.4 mm. ; of head, 1.5 mm. 



Fourth stage (74 : 13). Head (78 : 28) pallid, blotched with dull broAvn, there being a 

 broad diverging band on eitlxer side of the triangle, reaching as high as it by its outer 

 and higher edge, a narrow transverse belt uniting the coronal tubercles and broaden- 

 ing in the middle between them; and midway between these two, on the face, a nar- 

 row, transverse, zigzag or deeply lunate belt, which encircles the head and becomes 

 straight on the sides, separated from it by a narrow pallid patch; the lower portions 

 of the sides are wholly infuscated, like the upper half of the triangle. The whole head 

 is studded with larger and smaller, conical, white tubercles, from each of which springs 

 a short l^lack hair ; the moderately large and distant coronal tubercles are ferruginous ; 

 ocelli luteous edged posteriorly with black; jaws white at base, blackish castane- 



