1748 THE BUTTERFLIES OF NEW ENGLAND. 



laterodorsal series placed anteriorly ; a lateral series placed posteriorly ; a suprastig- 

 matal series placed centrally and an infrastignaatal series, two to a segment, tlie an- 

 terior subcentral ; last atxlorainal segment with two or tliree pairs of long, slightly 

 Tfcurved bristles, longer than the segments. 



Mature caterpillar. Head rounded, triangular or pyramidal, of about equal height 

 and breadth, broadest at the summit of the ocellar field, tapering aljove to a truncate 

 apex, the summit of each hemisphere independently domed, very broadly and gently 

 rounded beneath, much deeper below than above, the whole face almost appressed, the 

 sutures gently impressed, the whole surface subrugulose, with a subpolygonal net work 

 of slightly and bluntly elevated, illy defined lines. Triangle roundly emarginate 

 aci'oss its entire base, half as high again as broad, the sides approaching more rapidly 

 at the extreme tip, so that tliey join at little less than a riglit angle about the middle of 

 the front. Antennae with the first joint very broad, scarcely elevated, lilce a low, 

 broad tubercle; second joint very much smaller and no longer, cylindrical, shorter 

 than broad ; third half as broad as the second, cylindrical, about three times as long as 

 broad ; the fourth minute, cylindrical, the bristle of third joint curved, tapering, about 

 as long as the antenna. Ocelli six in number, four in a nearly straight line, the lowest 

 as far from the next as the upper of the four, the second midway between the first and 

 third ; a fifth above the others and forming with the upper three of the four first men- 

 tioned a gently curving line, convex anteriorly, and more curved above than below, 

 equidistant; the sixth smallest and placed behind the lowest of the curving row just 

 mentioned, and as far behind as it is in front of a line uniting the uppermost and 

 lowermost of all the ocelli. Labrum very small, cleft narrowly to the base so as to be 

 bilobed. Mandibles small, but massive, without dentation. Joints of maxillary palpi 

 of nearly equal length and ever decreasing size apically. 



Body largest on fifth and sixth aljdominal segments, tapering toward either end, 

 flattened beneath, flattened cylindrical above, everywhere larger than the head even on 

 the thoracic segments, excepting the collar-like flrst segment ; the front part of the 

 body capable of a great extension, the last segment flattened, broad, apically semicir- 

 cular. Segments divided transversely by rather deeply impressed lines into several 

 divisions, an anterior taking np rather more than half the segment, and itself partially 

 subdivided by lines which are not continuous on the sides, into a middle, larger section 

 and equal anterior and posterior sections ; and five posterior divisions or folds, of 

 which the hindmost is considerably larger than the others, which are equal; the body 

 is almost entirely naked, having only a few scattered, short, equal, microscopic hairs 

 on scarcely perceptible tubercles, besides a few longer, tapering hairs on the sides. 

 Spiracles not very large, broad, ovate, with prominent rims. Legs normal and equal, 

 the claws with a basal tubercle. Prolegs rather large, tapering but little. 



Chrysalis. Very long, cylindrical, slender, the thorax scarcely elevated, almost 

 straight and equal from the eyes to the end of the sixth abdominal segment, beyond 

 that tapering rapidly and regularly ; front transverse, rounded, developing at its upper 

 centre a slender, forward projecting, upcurved, tapering horn, longer than the head; 

 jirothoracic spiracle lanceolate, arcuate, not at all elevated, lateral; wings a little pro- 

 duced at the extremity, and just reaching the tip of the fourth abdominal segment; 

 tongue free beyond the wing cases and extending far beyond the tip of the abdomen ; 

 fore wings and antennae of equal length, reaching the middle of the first abdominal 

 segment; hind legs just exceeding the wings; protlioras with a transverse series of 

 four subequidistant, abruptly raised, transverse, oval, minute lenticles along the an- 

 terior edge, the outermost in front of the spii'acles; abdomen with a laterodorsal series 

 of similar lenticles, but in saucer-shaped depressions, two to a segment, one in the 

 middle of each half, the hinder slightly more separated than the anterior ; five succeed- 

 ing abdominal segments with an infrastigmatal series of similar lenticles on the an- 

 terior half of the segment; cremaster profoundly sulcate above, leaving a tliickened, 

 ribbon-like rim on either side, forming flattened carinae, which at first approach each 

 other rapidly, af tenvard run side by side ; similarly sulcate laterally at base and sepa- 

 rated again by a longitudinal ridge from the slightly sulcate, inferior face; tlie fleld of 

 anal hooklets altogether terminal, slightly transverse, the booklets crowded. 



