30 



Descriptive. — Young larva. — Head large, deeply notched, each tubercle distinctly 

 conical ; body cylindrical, slender, with no tubercles ; a little smaller in the middle 

 than at each end. Head and body uniformly of a dull, brick-red. Length 13 to 



Larva oefore the last molt. — With the characters of the adult larva ; salmon red. 

 Length 35 mm . 



Mature larva. — Twig-like, head very deeply notched, each side above conical ; the 

 face flat in front, the surface granulated. Prothoracic segment raised in front into a 

 large granulated piliferous tubercle. On the fifth abdominal segment a pair of large 

 lateral rough tubercles, a little paler than the body; on the 8th segment a pair of 

 converging pale granulated tubercles. Anal legs very large and broad, with a pair 

 of long dorsal sharp fleshy tubercles ; supra-anal plate very large, conical and acute, 

 with four setae near the apex. Body of even width throughout, reddish-brown, like 

 a reddish willow twig, or sometimes greenish. The surface finely granulated with 

 light and black, and with flat rough warts, paler in color than the rest of the body; 

 our on the front edge of each segment, and two dorsal ones behind. It varies in 

 color from reddish brown to green, thus mimicing willow twigs of different colors. 

 Length 55 mm . 



Pupa. — Large, full, stout ; dark brown. Cremaster large, stout, a projection on 

 each side in the middle, beyond rounded, sharp, the point ending in a slender fork. 

 Length 24 mra . 



Moth. — A large stout-bodied moth, with heavily pectinated antennae and rather 

 small wings. Fore wings narrow, with the outer edge longer than usual; pepper and 

 salt or ash sprinkled with black brown; an indistinct, diffuse, inner, curved line, 

 with a second one nearer and diverging a little on the costa, being nearer together 

 at the base. A third diffuse line encloses the discal spot. An outer distinct black 

 hair-line always p resent. Hind wings with three dark lines. Abdomen with two 

 rows of obscure black spots. Expanse of wings 60 mm . 



ICHTHYURA STRIGOSA Grote. 



The caterpillar of this interesting species was found July 30, at Bruns- 

 wick, Me., feeding on the Aspen (Populus tremuloides). It moulted 

 August 10, and about the 20th began to spin a silken cocoon between 

 two leaves. The moth (a male) appeared in the breeding cage at Prov- 

 idence, May 20. Like I. americana, it sits with the wings folded sharply 

 over the back, with the fore legs held straight out in front, with the 

 tufted tail curved up. 



Desckiptive. — Larva before the last molt. — Head broader than the body, flattened 

 in front, dull black, with long white hairs. Body flattened, with yellow and reddish 

 longitudinal stripes; three dorsal faint red stripes on a yellowish ground, and three 

 deep lake-red lateral stripes, the lowermost the broadest and deepest in hue. Two 

 bright yellow lateral stripes. Five pairs of flesh-colored abdominal legs, the legs pale 

 amber, colored like the under side of the body. Length 9 mm . 



Larva after the last molt. — Markings much as in the previous stage. Length 17 to 

 18 mm . 



The rude cocoon is formed by tying a few leaves together, gathering them by a web 

 at the edges, thus forming a roomy chamber, partly lined with silk, within which the 

 chrysalis rests. 



Pupa. — Smaller and not so full and rounded at the end as in J. inclusa; cremaster 

 as in that species, ending in two stout, very short, recurved spines. Length l'2 ram . 



Moth. — One male. Smaller and duller brown than I. indentata Pack. Palpi whit- 

 ish below, dark-brown- above, as in L. indentata (which closely resembles Fitch's /. 

 vau) : front of head slightly broader and squarer ; median thoracic brown band as in 





