POPLAR CATERPILLARS. 461 
mark aud bordered on either side by a black line. Subinarginal line broad, white, 
irregular, interrupted just before the internal augle. Terminal space black, narrow, 
reduced by the submarginal line which, at about the middle, nearly attains the ex- 
ternal margin. Fringes white interrupted with black between the veins ; costa with 
some black and white marks. Hind wings uniformly dark brownish, immaculate; 
fringes lighter. Under surface of both pair light brownish, with faint discal dots 
and bands. Thorax gray, varied with blackish on each tegula and the collar. Ex- 
pause 1.30 inches. (Grote.) 
34. Jpatela sp. 
The caterpillar of this moth was found on the poplar and willow 
August 10, at Brunswick, Me. September 8 it spun a silk cocoon be- 
tween a rolled-up leaf, sewing bits of leaves on the outside of the ex- 
posed part of the cocoon. The moth appeared May 24 following. The 
larva would be mistaken for a Notodontian. 
Larva. — Body compressed. Head compressed, high, deeply incised, bilobed, each 
lobe ending in a rounded tubercle. Head reddish-brown mottled with yellowish- 
green. Each segment deeply incised, the setiferous tubercles large, bearing long 
stiff hairs. The eighth abdominal segment is humped. Last pair of abdominal feet 
not much larger than the others. Body pea-green, with a deep reddish brown dorsal 
band twice interrupted aud forked on the prothoracic segment; the baud is edged 
with yellow. Thoracic and abdominal feet greenish. Length 12 mm . 
35. Apatela vulpina Grote. 
" The long, curved hairs," says Mr. R. Thaxter, " give thir larva a 
very curious appearance when at rest on the under side of a leaf, with 
its body curved about so as to form what appears to be an oval mass 
of down that is readily mistaken for a nest of spider's eggs. The 
curved hairs seem to come to a sort of focus in the region of se'gment 
9, which is very characteristic. Before entering the ground the body 
becomes dirty brownish green, the hairs become dirty yellow, the head 
entirely black, without marks." It feeds on the poplar and willow. 
(Papilio, iii, p. 15.) 
Larva before last molt. — Body greenish white, darker below, thickly clothed with 
long white hairs, slightly tinged with yellow. A jet-black, rather short, thick, 
black tuft on the median dorsal portion of segments 4, 6, 7, 8, and 11. Head light 
greenish, with a black dot on the frontal portion, each side of the median line, also 
two inferior black spots. Legs light green ; prolegs banded with black. Length, 
30 mm (1.20 inch). 
Full-fed larva. — Body light bluish green, whitish above, immaculate and without 
any black dorsal tufts. Thickly covered with tufts of long, curved yellowish white 
hairs. A few short black hairs on segments 11 and 12. Head large, dirty-whitish, 
with a few darker mottlings, and two inferior black spots on either side. Stigmata 
yellow. Length 45 mm (1.80 inch). (Thaxter.) 
Moth. — Allied to A. leporina and lepusculina (populi Riley). Wings creamy yellow- 
ish white. Hind wings pure immaculate white. The markings are as in A. leporina : 
a black basal dash ; the transverse anterior line consisting of three black spots ; a 
small ringed orbicular spot sometimes wanting ; a small lunate black reniform spot. 
Transverse posterior line fragmentary, but without the dash at the internal angle 
il en T" of A. lepusculina, or at most the smallest remnant of it. (Grote.) (Can. 
Ent., xv, p. 8.) 
