132 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Expanse of fore wing's, S 116 mm.; 9 155 mm. Lenoth of one fore wing, S 57 mm.; 

 9 75 mm. Breadth of one fore wing, <J 26 mm.; 9 35 mm. Length of hind wing', S 37 

 mm.; 9 50 mm. Breadth of hind wing, <? 28 mm.; 9 34 mm. 



£}/(/. — Slightly larger than those of Fades imperialis. Length, 3.1 mm.; width, 2.8 mm. 

 Oval, cj'lindrical, somewhat flattened; the shell is thin, parchment like, flexible; the surface with 

 microscopical obscure pits irregularly hexagonal, the pits often only partially formed (PI. XV, 

 fig. 4). Between each of the bosses is a tine hair, as in Eacles. 



For the eggs I am indebted to Miss Morton, who sent them June 25 from New Windsor, 

 N. Y. The}' hatched July 11. Tiie eggs nearly indistinguishable in shape and color from those 

 of E. imperiali'i. The egg-shell is so transparent that just )>efore the larva hatches it can be 

 seen lying curled up on its side. The head is large and black, while the body is pale, with 

 distinct yellow sutures. Also the black thoracic leg.s are visil)le, and the black spots, these 

 on the thoracic segments, elongated; also the dark spines and certain large ocherous patches on 

 the thoracic segments. 



Larva — Sta(je I. — Length, 6 mm. The head is large, wider than the body, smooth and 

 shining black all over, with a few tine dark hairs. The body is cylindrical, black all over, with 

 no stripes or spots of a lighter hue. A pair of large, long dorsal horns on the first thoracie 



segment, ending in a peculiar ))ul)ious swelling, and on 

 each side of the segment is a smaller subdorsal spine one- 

 third as long as the dorsal ones, which is simple at the 

 end, tapering to a point, bearing u short tine near the mid- 

 dle, and ending in a stout bristle. On each of the second 

 uul third thoracic segments is a pair of dorsal horns on 

 each side, or four to each segment. The outer or subdor- 

 sal horns are onl}' a little more than half as long as the 

 inner, but otherwise like the latter; the trunks are spiny, 

 the spinules minute, sharp, nearly equal in size, there being 

 about fifteen to each trunk or stem of the spine. The sin- 

 gular bull)ous termination is flattened, rather deepl}' divided, but somewhat like a chestnut in 

 shape, but wider in proportion, and each side is produced, ending in a ))lunt spinule, with a 

 stout thick base; the trunk is umber-brown, but the bull)ous extremity is l)lackisli brown. 

 On being touched the larva vigorously jerks its head and front body sideways. 

 Each of abdominal segments 1-7 has a pair of smaller sharp spines about one-third as 

 long as the longest thoracic spines, which are bent just beyond the middle where it sends ofl' a 

 spur; the end liearing a stout, not very long bristle. Besides these there is a pair of subdorsal 

 spines and a lateral smaller one situated above the insertion of the legs, or six spines to a segment. 

 There is a single median spine on the eighth segment just like the shoi'ter subdorsal ones on the 

 thoracic segments in shape and color, and ending like them in a forked bulbous expansion. Also 

 on the ninth segment is a smaller, shorter, single median donsal spine, but regularly forked at the 

 end, not swollen. On the tenth segment near the base are two stout, short spines, ending in four 

 jjranches. Behind them at the end of the suranal plate are four minute spinulo.se piliferous 

 spines, which are black, all the others in front being brown. The large, broad, squarish anal 

 legs are corrugated on the side. All the legs, thoracic and abdominal, are black. The specimens 

 died before molting. 



According to Harris: ''Color of bodv black a})ove and beneath; an olisolete series of 

 . . . Y 



ferruginous lateral lines directed obliquely downward toward the tail, most conspicuous on the 



posterior half of the body; sixth and seventh segments ferruginous above; spines pale ferruginous, 



black at tip. July 21. a. m., it cast otf its skin. July 25, cast its skin again." (Correspondence, 



p. 297.) 



The following description is drawn up from s])ecimens bred at rroxidenec. and described 



October 10. They fed on hickory, and were sent to Mr. Bridgham from Ceorgia. 



Fitf. Is. — Penis-sheath of C. rcjalU. 



