308 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
Mr. S. H. Scudder has found it on the black birch. u It forms a 
cocoon by spinning in the midst of a bunch of leaves a close and firm 
cocoon of a bluntly fusiform shape, having a long neck extending above 
and below (it hangs perpendicularly) to the end of the many threads; 
open at both ends by an aperture about one-tenth of an inch in 
diameter." 
Larva.— Of the color of the twig (of black birch), dull brownish-red, speckled con- 
siderably, and especially above, with dirty-white specks, arranged very frequently 
in lines, either longitudinal on the sides or curved forward above and becoming 
transverse. Head a little paler than the body; labruin and feet at base whitish. 
On the posterior portion of the fifth and eighth segments above there is a transverse 
paler ridge bordered with black. Length, 2 inches. 
Moth. — Delicate ocher-yellow, with a reddish tinge toward the edge of the wings 
and on the head and front of the thorax. Fore-wings with two lines, often inter- 
rupted, or only developed on the costa ; inner line on the inner third of the wing; 
the curved outer line, beginning near the inner, diverges and follows a sinuate 
course, ending much nearer the apex than the inner line, the distance varying; 
both wings speckled, sometimes thickly, with unusually large spots; outer edge of 
both wings deeply excavated, especially opposite the second median venule. On the 
hind wings no lines; an obscure discal clot centered, with a short translucent line. 
Beneath, much as above, but no lines, except in one case a diffuse dark line crosses 
the hind-wings. (The female differs in the usual characters of the dentated forms.) 
Fringe dark, whitish in the notches on both wings. Expanse of wings, 2 to 2.20 
inches. 
67. Geometrid larva. 
This measuring worm was observed to be common on the hickory in 
the Arnold Arboretum at Jamaica Plains, June 4. 
Larva. — Body thick, of uniform diameter throughout its length. Head brick-red, 
granulated with fine yellow tubercles, about as wide as the body. Prothoracic seg- 
ment reddish above, spotted with black. Body bright straw-yellow low down on 
the sides and beneath, including the spiracles. Above, with alternating yellow and 
brown lines, the black lines inclosing about eight yellow ones. Length, 22 to 25 mm . 
68. Geometrid larva. 
This larva is a general feeder on the pig-nut hickory and Ostrya vir- 
ginica, and resembles a canker worm (A. pometaria). It was common, 
May 30, at Providence. 
Larva. — Pale green, color of the leaf it feeds on. Head small, round, two-thirds 
as wide as the body, which is rather thick. A rudimentary pair of feet on the fifth 
abdominal segment. Two subdorsal white threads, and a much narrower lateral 
thread line ; in one specimen a dark dot behind each spiracle ; sutures yellowish white. 
Length, 22 to 23 mm . 
69. Geometrid larva. 
This measuring worm occurred May 30, at Providence, on the pig-nut 
hickory. 
Larva. — With large clasping prothoracic legs. Head somewhat square in front, as 
wide as the body, with reddish-resinous short curved lines. Segments much tuber- 
culated on the sides, some of the tubercles beariug.the spiracles. A broad, irregular 
spiracular line ending on the first pair of legs. Body black above, with a broken 
