1062 THE 15UTTERFLIES OF NEW ENGLAND. 



lower half of the lower median interspaces; it is, liowever, more prominent in the 

 subcostal region in the $ than in the $ ; inner border very strongly and very 

 abruptly expanded at the base, beyond scarcely convex, the outer angle scarcely 

 rounded oft". Costal nervure destitute of a precostal branch; vein closing the cell bent 

 at a strong angle near the middle, striliingboth subcostal and median nervures at equal 

 distances beyond their second divarication. 



Fore tibiae more tlian three-fifths the length of the middle tibiae ; fore tarsi slightly 

 longer than tlie fore femora, about four-fifths the length of the middle tarsi and scarcely 

 three-fourths that of the hind tarsi; hind femora two-thirds the length of the middle 

 pair in both sexes. Tibiae rather abundantly supplied with very short and very slender 

 spines over the whole of its surface, the apex witli rather long and slender tapering 

 spurs. First joint of tarsi scarcel.v equalling the others combined, the second l)ut 

 little longer than the third and the fifth but little longer than the fourth ; furnished 

 very abundantly on all sides with short and very slender, delicate spines, arranged in 

 longitudinal rows, four of which are on the under surface; an apical pair on each 

 joint are much longer than the others ; claws small, slender, compressed, divaricating 

 moderately, rather strongly curved, bent a little in the middle, bifid for about half 

 their length, the lower branch a very little shorter, both finely pointed ; paronychia 

 simple, consisting of a rather broad, elongate lobe outside of and partially concealing 

 the claws, nearly equal , straight, tapering toward the tip , nearly as long as and reaching 

 the point of the claw ; pulvillus nearly circular, small, on a rather stout, cylindrical 

 pedicel, kalf as long as the claw and constricted at the apex. 



Eighth abdominal segment of male apically prolonged into a compressed, hood-shaped 

 expansion above, half as long as the body of the segment. Upper organ with a moderately 

 large centrum but a very small, cylindrical, tapering, pointed liook, curving a little down 

 ward on its apical half, the extremity of the centrum bearing a considerable, inferior, 

 compressed expansion, the form of which should be studied from living specimens. 

 Clasps subquadrate, but tapering, a little convex, but hollowed in the middle of tlie 

 basal lial f , the edges greatly thicliened, incurved and bearing, near the upper posterior 

 angle of the clasp, several pretty stout, incurved, laminate teeth. 



Egg. Fusiform, about three and a half times longer than broad, largest just below 

 the middle, regularly tapering above to a very narrow summit and rounded, roundly 

 tapering below to a broader but very narrow and truncate base. Vertical ribs numer- 

 ous, sharp, but very little elevated, not infrequently furcate ; transverse lines very slight 

 and not sharp. (From alcoholic specimens.) 



The shape is badly given in the plate and the cross striae are not shown (65 : 31). 



Mature caterpillar. Head well rounded, of equal breadth and height, scarcely 

 narrower tlian the segment behind it, truncate below; consider.aljly compressed, of 

 subequal depth excepting above ; the triangle reaching nearly the middle of the upper 

 half of the liead; surface sparsely provided with small butliigh conical tubercles, each 

 emitting a rather short, forward curving hair. Ocelli six in number, the anterior four 

 in a scarcely arcuate row, the upper three subequidistant, the fourth a little further 

 removed, the fifth and sixth in a row parallel to these, respectively behind the first and 

 third. 



Body slender, cylindrical, tapering distinctly from the middle of the thoracic seg- 

 ments forward and from the sixth .abdominal segment backward ; abdominal segments 

 subdivided into six subsegments, of wliicli the second is the largest; the thoracic seg- 

 ments witli a less number; covered rather sparsely with small, equ.al, blunt, conical 

 papillae, nearly twice as high as broad, arranged in transverse rows, one to each sub- 

 segment; othei-wise the papillae are irregularly distributed, except that they are most 

 abundant in the dorsal and suprastigmatal fields and only appear below the stigmata in 

 infrastigmatal patches in the middle of the segments; these papillae support short, 

 slightly curved, equal, bvdbous-tipped hairs, among which are a very few of twice the 

 length of tlie others; spiracles rather long, obovate. Legs moderately stout, rapidly 

 tapering, the basal joints particularly large, the front pair scarcely half so Large as the 

 others ; hooks minute, slender, curved. Prolegs short and stout. First thoracic seg- 



