754 THE BUTTERFLIES OF NEW ENGLAND. 



cell ; the second a little before the apex of the cell ; the third as far beyond the apex 

 of the cell as from the fourth ; and the latter at somewhat more than half way from 

 the apex of cell to the outer margiu ; second inferior subcostal nervule arising two- 

 fifths way doAvn the cell ; cell very nearly half as long as the wing and nearly tliree 

 times as long as broad. Last median nervule connected, fully half as far beyond its 

 base as that is from the base of the first nervule, with the vein closing the cell. 



Hind wings with the costal border strongly arched just at the base, beyond straight; 

 the outer border, as far as the middle subcostal nervule, slightly convex and bent at a 

 very broad angle with the inner margin ; from the lower subcostal nervule to the sub- 

 median straight but considerably crenulate and directed at very slightly more than a 

 right angle with the initial portion, the pai't in the lower subcostal interspace dividing 

 the angle between them and crenulate; lower angle a right angle, scarcely rounded; 

 inner margin very prominent and angulated at the extreme base, beyond straight, tlie 

 portion beyond the submedian guttered. Precostal nervure originating opposite the 

 divarication of the costal and subcostal nervures, curving strongly outAvard. Second 

 subcostal nervule arising more than half as far beyond the first as that is from the 

 divarication of the costal and subcostal nervures ; cell closed by a scarcely percepti- 

 ble vein. 



Fore legs very small, cylindrical, in the male clothed, not very thickly, with I'ather 

 'long, spreading hairs on both sides and above; tibiae less than half (^) or nearly 

 two-thirds (?) the length of the hind tibiae, in the female furnished with spurs ; tarsi 

 a little shorter ((J) or one-fourth longer ($) than the tibiae; either composed of 

 a single, unarmed, undivided joint, the tip bluntly conical ((^) ; or perfectly formed, 

 the first joint as long as the others together, the second and fifth equal and scarcely 

 longer than the third, the fourth half the length of the fifth; furnished on either side 

 and along the middle beneath, excepting on the last joint, with a row of rather long 

 and slender, pretty frequent spines, the apical lateral ones a little longer than the 

 others; the terminal joint furnished with claws, paronychia and pulvillus like the 

 other legs, only smaller ( ? ). Middle tibiae scarcely so short as the hind tibiae, both 

 furnished beneath with an apical pair of short, slender spurs, but no spines. First 

 joint of tarsi fully equalling the succeeding three together, the second and third about 

 equal and scarcely so long as the fifth, furnished beneath with four rows of not very 

 long, slender, nearly recumbent, crowded spines, the apical ones a little longer than 

 the otliers on each joint. Claws very small, short, rather stout, tapering, the apical 

 half strongly curved, the tip bluntly pointed; pai'onychia double, the superior lobe 

 scarcely so long as the claws, slender, tapering, a little curved, bluntly pointed; the 

 inferior lobe nearly as long as the other, slender, nearly equal, bluntly pointed, 

 straight; pulvillus minute, almost transversely linear, the anterior edge broadly 

 rounded. 



Eighth abdominal segment of the male laterally angulate and produced in the middle 

 into a tapering, hook-shaped process, the tip of which (with its long apical tuft of 

 bi'istles making it of much greater apparent length) is usually concealed by the clasps, 

 and, with them, conceals the acicular and very slender upper organ, which passes be- 

 tween a pair of tapering, acicular hooks depending from the base of the outer edge of 

 the produced tip of the upper organ. Clasps simple, lamellate, entire, uniformly 

 compressed, about twice as long as broad, directed upward and backward. 



Egg. With no constriction below the tip, about two-thirds as broad as high. Ver- 

 tical ribs increasing considerably in height upward, where they terminate abruptly, as 

 in Polygonia, leaving a similar depressed summit. 



Mature caterpillar. Body very slender, enlarged at the thoracic joints, with the 

 dorsum of the last abdominal segments subdepressed ; a blunt, supralateral?, anterior 

 tubercle on either side of the middle thoracic segment. 



Chrysalis. Head a little excised apically, separating two slight, lateral promi- 

 nences; abdomen beyond the base elevated dorsally to a height nearly equal to that of 

 the mesonotum. 



Distribution. This is a strictly American genus found mostly in the 



