132 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Expanse (if foir wiiiiis. J lie. mm.: 9 l.")."> mm. Loiioth of one fore wing, S 57 mm.; 

 9 Ta mm. Breudrh of one fore winy, <? -M nnn.: 9 8.5 nun. Length of hind wing. S ■i7 

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



jEffc/. — Sliglitly larger than those of Jufclex imjieriaUs. Length, 3.1 mm.; width, 2.8 mm. 

 Oval, cylindiical. somewhat flattened: the shell is thin, parchment like, flexible: the surface witli 

 microscopical ol)scure ])its irregularly hexagonal, the pits often <.)nly partially formed (PI. XV, 

 fig. -1). Hetween each of the ))osses is a fine hair, as in Eacles. 



For the eggs I am indebted to Miss Morton, who sent them June 25 from Jsew ^\'indsor, 

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

 of K hiiprridHs. The egg-shell is so transparent that just before the larva hatches it can be 

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

 distinct yellow sutures. Also the black thoracic legs are visi))le. and the black spots, those 

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

 the thoracic segments. 



Lnrna — Stage I. — Length, ti nun. Tlu' head is large, wider than tlie liody, smooth and 

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

 no stripes or spots of a lighter hue. A pair of large, long dorsal iiorns on the first thoi'acic 



segment, ending in a peculiar bulbous swelling, and on 

 each side of the .segment is a smaller su])dorsal spine one- 

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

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

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

 iiid third thoracic segments is a pair of dorsal horns on 

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

 sal horns are only 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 

 Fi;;. i.H -i\r.is-sii«uh uf c. nyniis. a])out fifteen to cacli trunk or stem of the spine. The sin- 



gular bulbous termination is flatteiu'd, rather deeply divided, but somewhat like a chestnut in 

 shajM", but wider in proportion, and each side is produced, ending in a l>lunt spinule. with a 

 stout thick Itase; the tcunlv is umljer-brown, but the Indbous extremity is blackish 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 otf a 

 .si)ur; the end bearing 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 shorter 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 dor.sal spine, l)ut regularly forked at the 

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

 branches. Behind them at the end of tlicsuranal plate are four minute si)inulose piliferous 

 spines, which arc blacl^. all the othci-s in front being Inown. The l:irg(>, broad, squarish anal 

 legs are corrugated on the side. Ail the legs, thoracic and abilominal. arclilack. The specimens 

 died before molting. 



According to Harris: ''Color of body black al)o\'e anel Ijencath: an obsolete series of 

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

 posterior half of the body; sixth and seventh. segments ferruginous above; s[)ines pale ferruginous, 

 black at ti|i. Julv 21. a. m.. it cast off its skin. .Julv 25. cast its skin again." (Corrcs'^jondence, 

 p. 297.) 



The following (lescri])tion is drawn up from specimens bred at Proxidence. and described 

 October 10. Thev fed on hickorv. and were sent to Mr. Bridgham fiom Oeorgia. 



