606 FIFTH KKPORT OF THE ENTOMOLOGICAL COMMISSION. 
red with eompoand spines; two on each side of the second segment black, pro- 
oeediog from ;i red wart: two on each side of the third segment, the main stein being 
red at base, yellow at extremity, and those proeeeding from it being black. On all the 
other segments but the last two (oo enoh sideofwbioh there ere two compound black 
spines then are seren, three on eseh Bide and one on the book. That on the back is 
yellow and smaller than the reel : those nearest this are also yellow, but with black 
extremities, particularly toward the head : those below these Inst have a red stalk 
with black spines proceeding from it, and those along the stigmata] line (which line 
is v. tv Light yellow) an- of the same ooloi as that line and very small. Two lines run 
along the back, closes! together near the spines and having the appearance of a 
ision Of links. There are also other lines running parallel with these, but not 
so distinct, along th»« sides. Head perpendicular, free, larger than the body, very 
dark purple-brown, and covered sparsely with small white points from which proceed 
fine white bristles: on the top it has two black compound spines. Thoracic legs same 
color as head, the prologs of a lighter brown. Length, lj inches; diameter, one-fifth 
inch. 
It hangs by the creruaster and anal prolegs* to a small bunch of 
flesh colored silk, and changes to a chrysalis similar in form to others 
of its group, of a fleshy-brown color shaded with bluish-black. It has 
a crescent-shaped projection on the thorax, with four golden spots just 
below. The wing-sheaths are faintly green, having a slight resem- 
blance to a leaf. 
Some specimens of the larva are much brighter than others, being 
speckled or mottled all over with white, and the chrysalis, instead of 
having four goldeu, has often four brilliant, silvery, metallic spots, 
while the whole body may be tinted with gold and green, particularly 
along the stigmata. 
Mr. Scudder says : 
Judging from the dates given by Harris's correspondence, the chrysalis state lasts 
from eleven to seventeen days. Grosse (Canada) says eleven days. Edwards (in 
West Virginia), seven to eleven. Braun, in Bangor, had them hang twenty days at 
the end of July. 
My specimens at St. Louis remained nine days, on the average, in 
the chrsyalis state, which is most frequent in July, while the butter- 
flies are most numerous in August. The butterfly, therefore, appears 
in Missouri about the same time as in the New England States, viz, 
from the last of July to the middle of August, and is probably but 
two-brooded. 
Parasites. — Two parasites are found in the eggs, Telenomus grapta? 
Howard, reared at Washington, and Trichogramma intermedium How- 
ard, reared by Mr. Scudder at Cambridge. An undescribed Apanteles 
and Pteromalus vanessce Harris are quite frequently reared, the one from 
the larva, the other from the chrysalis. Tetrastiehus modestus Howard 
is a secondary parasite on the Apanteles, while a large Ichueumonid, 
Roplismenus morulus Say, was once reared from it by Miss Pierce at 
Cambridge, all recorded in Mr. Scudder's work. 
•See a paper by the author on the "Philosophy of the pupation of Butterflies, '* Proo. 
Am. Ass. Adv. Sc, for 1S79, vol. 23, pp. 455-463. 
