460 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



black point exteuding in front from the miildle of the vertex. Body pale green, 

 exactly of the color of the 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, 22™™. 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. Apatela noctivaga Grote. 



The egga were observed by Mr. Thaxter to be laid on the poplar 

 July 14 [4tb]; 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™>". 



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) suftused with red. Head dirty red, greenish in front. Somewhat 

 thickly covered with tufts of stout black hairs. Length 5.5'"™. 



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, Ihose on segment 10 much shorter than the rest. Legs green, edged with 

 red. Abdominal legs banded, green and red. Head dark bluish, mottled, tapering 

 gradually posteriorly and suddenly anteriorly from segment 11. Length 8™™. 



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 region of segments 2 to 4. Length 10™™. 



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™™. 



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 mo/t.— August 1. Much as before, the setiferous tubercles 

 large and rough, jet black, bearing thick tufts of short, stiff black hairs. Lateral 

 band and dorsal spots dark red. Head and abdominal legs shining black (form of 

 body as in A. brumosa). Length 30™™ (1.20 inches). (Thaxter.) 



Moth. — Forewings 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, ttordered ex- 

 ternally by a black line which commences from a broader black costal mark. Median 

 space large dark gray; median shade band blackish, traversing the reniform spot. 

 Ordinary spots of the normal shape, distinct; reuiform 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 



