22 MAINE AGRICULTURAL EXPERIMENT STATION. I913. 



time the young worms are very active, letting themselves down by a 

 thread as readily as when fully grown. 



"Larva before last molt. Body not quite so thick as full-fed worm ; 

 more uniformly rust-red brown ; the piliferous warts duller in color, 

 sometimes not much paler than the rest of the body towards the head, 

 though higher and more distinct towards the end of the body. Head 

 black and prothoracic shield black, the latter pale on front margin; no 

 well-marked, broad, lateral, yellowish-brown band. Length 12 to 13 mm. 



"Larva (full-fed). Body unusually thick and stout, tapering grad- 

 ually from the middle to the end, and slightly flattened from above, 

 as usual; head not quite so wide as the body, of the usual form, dark, 

 almost black-brown, but lighter than before the last molt, mouthparts 

 dark, with paler membranous rings at the articulations ; antennae with 

 the terminal joint black. 



"Prothoracic shield pale brown, paler than the body, with a pair of. 

 dark blotches on the hinder edge in the middle, and other scattered, 

 smaller, dark, irregular blotches, of which two are situated in the 

 middle of the front edge, the latter pale whitish. Body rich umber- 

 brown, diffused with olive-green, especially on the sutures ; with very 

 conspicuous and showy, large, whitish-yellow, piliferous warts, forming 

 flattened minute tubercles, with a dark center from which the hair 

 arises. On the top of the second and third thoracic segments is a 

 transverse row of four warts on each segment; on the upper side of the 

 abdominal segments are. four warts arranged in a short trapezoid; they 

 are far apart transverseh^ but unusually near together antero-posterior 

 to the body; on the penultimate segment is a median, broad, light-yel- 

 lowish spot on the hinder edge of the segment ; a large, round, convex 

 area, forming the supra-anal plate, from which arise about six fine, 

 long pale-brown hairs. Anal legs spreading, with two or three piliferous 

 callosites ; the terminal segment and anal legs concolorous, with an ir- 

 regular, broad, pale-yellowish lateral band reaching to the prothoracic 

 segment, and slightly tinged with ferruginous. In this band, on the 

 side of each segment, is a pale-whitish, flattened wart, directly in front 

 of and adjoining the spiracle ; along the narrow, lateral, fleshj' ridge on 

 each segment is a long, narrow, pale-yellowish wart. Beneath dull, 

 livid greenish, with (on each segment) a transverse row of four bright- 

 yellowish warts, concolorous with those above ; the two inner ones are 

 minute, the outer ones much larger. Thoracic legs black-brown ; the 

 four pairs of abdominal median legs are pale, almost whitish ; all the 

 hairs are fine and light-brown in color, and one-half as long as the 

 body is broad. Length 19 mm. 



"Pupa. Body very thick, the thorax especially unusually swollen ; the 

 body, soon after changing, pale horn-colored, striped with brown ; an- 

 tennae and legs dark horn-color or dull tan-brown ; wings pale, with 

 the veins dark; the thorax pale horn, spotted with dark tan-brown, with 

 three irregitlar, dark, dorsal stripes ; meso-scutellum 'and metanotum 



