POPLAR CATERPILLARS. 461 



mark and "bordered on either side by a black line. Subuiarginal line broad, white, 

 irregular, interrupted just before the internal angle. 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 dott> 

 and bands. Thorax gray, varied with blackish on each tegula and the collar. Ex- 

 panse 1.30 inches. (Grote.) 



34. Apatela 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 and forked on the prothoracic segment ; the band is edged 

 with yellow. Thoracic and abdominal feet greenish. Length 12'"°>. 



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 segment 

 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. 

 (Fapilio, 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 ; prologs banded with black. Length, 

 30mm (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™" (1.80 inch). (Thaxter.) 



Moth. — Allied to A. leporina and lepuscuUna (popuU 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 

 "ere T" of A. lepuscuUna, or at most the smallest remnant of it. (Grote.) (Can. 

 Ent., XV, p. 8.) 



