92 
MEMOIRS OP THE ^lATIOXAL ACADEMY OP SCIENCES. 
Larra^ Stage III. — Lenytli, 10 inin. The head is still largCj iiuich wider than the body, and 
green, with a purple stripe on each side. The yellow, lines are more distinct than before, and the 
body has a purplish tinge. (De.^cribed from Eridgham’s hgure (PI. YITI, tig. ~) observed July 8, 
Lavra, Stage 1 P.— Length, 20 mm. In one observed July 20, and nearly full-gro-wn, the head 
is still without the lateral black stripe, and the two subdorsal yello^v stripes are very distinct, but 
there are no pink spots anywhere on the body. The small spiracles are pale orange. 
In another drawn by :\Ir. Bridgliam (PI. VIII, tig. 4), and also 20 mm. in length, the head is 
not banded, but thebody is i)rettily spotted with i)inkish red, in the following manner: Two round 
dorsal spots on the first thoracic segment; a broad pink-red transverse band on the sec( nd and 
third thoracic segments, each broken into two by a transverse median whitish line; on abdominal 
segments 3-0 is a pair of dorsal red, rounded spots, growing larger and more distinct toward the 
end of the body, there being four spots on the ninth segment. The subdorsal yellow lines are 
well marked. 
Larva, last [fifth) stage. — Length, 30 mm. One found on the aspen August G, was pale green, 
near the color of the underside of the leaf. Ilead ^ smooth, polished, darker green than the 
body, with two black stripes on eacli side, not meeting above on the vertex. Body green, tapering 
at each end, smooth, nearly hairless, witli no i)diferous warts, the scattered hairs being minute; 
two hue subdorsal yellow lines, and Dyar has observed a faint whitish substigmatal line on 
second and third thoracic segments. Thoracic segments 1-3 each with dorsal pink-red blotches 
or spots, two on the prothoracic segment, while those behind are not so divided. Abdominal 
segments 3 to 0 each with a conspicuous pink-red dorsal stpiare spot, the space between the spots 
more or less yellow; m.ne on the snranal i)late, which is smooth and rounded, while tlie two 
subdorsal yellow lines do not meet on it; no spots or dots on the side of the body below the 
subdoi'sal lines. Thoracic and abdominal legs of the same color 
as the body. 
Dyar remarks that it is often associated with liapliia frater, 
whicli it much resembles in general structure, though it is more 
slender. (Psyclie, vi, 14G, Sei>tember 18.) 
Cocoon . — A very slight web of silk sj)un between two leaves, 
simply enough silk spun around the edge of the inclosure to hold 
the leaves togetiier, the silk mostly coufined to the edge of the 
cocoon, which measures about 22 by 20 mm. The i^upa lies very 
loosely in its cocoon. 
Length, 15-lG mm. Of very niiusnal shape, being flattened oval cylindrical ; posterior 
end of the body (fig. 53) much rounded and blunt, smooth, with no distinct traces of a cremaster, 
much less than in other pnpic inclosed in cocoons; surface of the body rather smooth, less 
pitted, and the minute pits or punctnatious more divstinct ajid numerous on the dorsal than on the 
ventral surface. In color darlc brown, much darker than usual in ^otodontians or other moths. 
Habits . — The eggs are laid the last of June and during the first week in July in Maine, 
and probably two weeks earlier in southern New England. There are apparently five stages,- 
and the duration of Stage I is about three days, as is that of Stage II, and that of Stage III 
about five days. 
One larva July 2(1 spun a very slight cocoon between two leaves, and pupated July 28. On 
this caterpillar there were no red spots. 
The moth appeared in the breeding box at Providence May 30, having been brought from 
Maine in the pujia state; another one appeared June 1, also from Maine, in the. larva state. 
Mr. Howard L. Clark has reare<l this moth from caterpillars found on the Balm of Gilead at 
Warwick, R. I. The moth appeared July 22, having been in the chrysalis state about ten days. 
Riley states (MS. notes) that the moths occur in* May, June, and July. Mr. O. H. Hudson 
gives the following dates of capture of the moths at Plattsburg, N. Y. : May 22, 1; May 20, 1 ; 
June 3, 1; June 5, 1; June 7 to 24, 22; July 10, 1; July IG, I; July 17, 1; July 20, 1, July 27 to 
August 13, 30. 
' Pyar's uieasurenients of tlie widtli of the head for the last four staj^es are as follows: Calculated, 0.48, 0.74,. 
1.14, 1.75, 2.7 mm. Ratio, 0.65. Fouud, 0.7, 1.2, 1.7, 2.7 mm. (Psyche, vi, 147.) 
Fig, 53.— End of pupa of Ghiphisia septen- 
tfionis; 9, vestige of genital outlet 
female. 
