4(J0 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
Mack point extending in front from the middle of the vertex. Body pale green, 
exactly of the color of tin- under side of the poplar leaf, with a subdorsal pair of 
white lines: the sutures finely marked with pale straw yellow; the surface slightly 
wrinkled, and finely, evenly granulated With white. Length, 9S^""« A smaller larva 
on the willow in a Stage before the last molt has the head wood-brown in front, the 
head of the aspen larva being entirely black. 
33. Apatt&a noctivaga Grote. 
The eggs were observed by Mr. Thaxter to be laid on the poplar 
July II [4th]; they hatched July 9. The caterpillar molted 5 times, 
made a cocoon between the leaves August 9, and the moth appeared in 
May and June (Papilio, iii, p. 15). 
Young larva. — Greenish-white; dorsal portions of segments 1, 4, 7, 8, and 11 red; 
the rest more or less tinged with red. Sparsely clothed with long blackish hairs. Be- 
neath greenish-white. Head brown, rather stout, not tapering. Length 3"" a . 
Larva after first molt. — July 12.' Color dirty greenish. Segmentation very dis- 
tinctly marked. Dorsal patches dull reddish on upper portion, the other segments 
(except 9 and 10) suffused with red. Head dirty red, greenish in front. Somewhat 
thickly covered with tufts of stout black hairs. Length b.h mm . 
Larva after second molt. — July 12. Much darker than before, the red colors having 
become dark wine-color, somewhat mottled, and being suffused over the dorsal por- 
tion of all the segments except 9 and 10. Sublateral and ventral portions light green, 
except on segments 1, 2, and 3, which are tinged with red. A whitish lateral line. 
Body covered with black setiferous warts, on which are set thick tufts of short stout 
black hairs, those on segment 10 much shorter than the rest. Legs green, edged with 
red. Abdomiual legs banded, green and red. Head dark bluish, mottled, tapering 
gradually posteriorly and suddenly anteriorly from segment 11. Length 6 mm . 
Larva after third molt. — July 20. Dull black above, yellowish beneath. A yel- 
lowish lateral line, two yellowish dorsal patches on segment 10, on which the hairs are 
short. Head blackish, with an anterior yellowish V-shaped mark. Legs greenish 
yellow ; abdominal legs blackish. Segment 11 much humped. Body stout, much 
hunched in the regiou of segments 2 to 4. Length 10 mm . 
After fourth molt. — July 24. Black above, deeper anteriorly. A distinct yel- 
low lateral band beginning on segment 4 and running just below the stigmata, which 
are white, contrasting. Thoracic feet yellow ; abdominal black. Dorsal patches on 
segment 10 brighter, otherwise as in preceding stage. Length 13 mm . 
After fifth molt. — July 28. Lateral band orange-colored. A broken yellowish 
stripe at base of legs ; two dorsal orange spots on segment 10, and in some specimens 
two smaller spots on segment 9. 
After fifth and last molt.— August 1. Much as before, the setiferous tubercles 
large and rough, jet black, bearing thick tufts of short, stiff black hairs. Lateral 
band and dofsal spots dark red. Head and abdominal legs shining black (form of 
body as in A. brumosa). Length 30 mm (1.20 inches). (Thaxter.) 
Moth. — Forewiugs dark gray varied with black; ordinary lines white. Basal 
space black, grayish on the costa ; basal half line white, bordered externally by a 
black line. Transverse anterior line white, widely lunulated, distinct, bordered ex- 
ternally by a black line which commences from a broader black costal mark. Median 
space largo dark gray: median shade baud blackish, traversing the reniform spot. 
Ordinary spots of the normal shape, distinct : reniform spot attenuated, black, with 
a hardly perceptibly lighter center; orbicular spot round, black, with an ill-defined 
grayish inner ring. Between the ordinary spots in the lower middle of the ring is a 
squarish black spot bordered externally by the median shade. Transverse posterior 
line white, acutely deutated, arcuated in front, preceded near the costa by a whitish 
