112 MEMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 



(PI. VII; XXIII, %. 2; XXXII, fig^?. 2, 8; LII, figs. 4, ia-4,!; LIII, figs. 2, 2rt-2r.) 



B. D. Walsh (description by Liiitiier), Proc. Pint. Soc. Phil., Ill, p. 42t). 1S64. 

 W. Saunders, Can. Ent, II, p. 7"). 1870. 



T. Glover, Rep. U. S. Dept. Agr., p. S3, fig. 1S70. 



J. A. Lintner, 26th Rep. N. Y. State Cab. Xat. Hist., p. 133. 1872. 



C. V. Riley, 5th Rep. Ins. Missouri, p. 137. 1873. Fig. of larva, pupa, and moth 9 • 

 C H. French, Trans. Dept, Agr. Illinois, XV, ji. IHG. 1877. 



A. R. Grote, Can. Ent., XIX, p. .52. 1887. 



Mrs. Ballard, Insect Lives, p. 83. 1879. 



/. Marten, Trans. Dept. Agr. Illinois, XVIII, Appendi.K, p. 121. 1880. 



A. S. Packard, 5th Rep. U. S. Ent. Comm. Insects Inj. Forest and Shade Trees, p. 393, fig. e.K Riley. 1890. 



A. S. Packard, Proc. Amer. Phil. Soc, Mar. 17, 1893, XXXI, Xo. 141, ].. 142-144, PI. V, tig. 1. Larva, stage II. 



ir. Beutenmiiller, Cat. bonibycine moths N. York, p. 440. 1898. 



Lnmjii. — 5 ^,59. Head and body uniformly pale ocherou.s, varyinj;- in depth of hue. The 

 front of the head below the vertex and the spreading tuft of hair-like scale.s at the base of each 

 antenna rose pink. 



Fore wings deep roseate on the basal half, the hue varying- from light to dark; the outer edge 

 of the wing also roseate from about the middle of the inner edge to the eosta just before the apex, 

 the middle of the wing being \-ellow: and this subtriangular median band varies in width, some- 

 times being wide on the inner edge or not reaching clear across the wing to the inner edge; the 

 band also varies in regularity on the inner side; no discal spot; fringe pale ocherous. 



llind wings yellow ocherous, with a submarginal pink band, narrow in the middle of the wing 

 and widening on the inner edge. Underside of the fore wings much as above, but less roseate 

 at the ba.se of the wings. Hind M-ings with the entire costal edge pink, otherwise as above. 

 Al)donien on the underside along the middle pink, but ocherous at the end. Legs all pink. 



Expanse of fore wings, S -iO mm.; 9 -tS mm. Length of fore wing, $ 'l*d mm.: 9 --t mm. 

 Breadth of fore wing, ^ 10 mm. ; 9 1l' nmi. Length of hind wing, ^' 13 mm.; 9 16 nmi. Width 

 of hind wing, $ 10 mm. ; 9 12 mm. 



Vitrtafionx. — One $ from Franconia, N. H., received from Mrs. Slosson, is paler, less 

 ocherous, almost cream white, luore bleached in aj)pearance and with less roseate, and tlie pink 

 paler than in the normal form. Fore wings with an extradiscal narrow pink line, but beyond this 

 the edge of the wing is pale like the middle of the wing. Hind wing M'ith no pink band above 

 or beneath, though the costal edge is pink. It is of the usual size, though slightly larger than 

 one of mj' males of the normal form. This mountain form is apparently intermediate between 

 Grote's race uiha and the normal ruhlcuiiilK. 



Egg. — Length, l.-± mm; oval, a little flattened; the shell ^yellow, thin, parchment-like, tiie 

 surface smooth, polished, under a one-half inch objective showing no traces of pits or pol\'g'onal 

 areas. The shell is so thin that unfertilized eggs collapse irregularly. 



.According to Riley the eggs are deposited in patches of thirty and upward on the under side 

 of a leaf. They are ))ale greenish in hue. 



Larrii — SfiKh I. — Length. .") nun.: at end of the stage, 7 nun. The head is deep black, large, 

 rounded, and directl}' after hatching, before the larva has begun to eat, much wider than the 

 body. Prothoracic segment at rirst nmch wider than the rest of the l)ody and without any dark 

 pigment on the cervical shield. Tiie i)ody is now pale yellowish, with a slight greenish tinge. 

 Except a slight dusky medio-dorsal line the body is not yet striped, and there is no trace of 

 reddish pigment on thi' under side. 



Th(> two horns on I he second thoracic si'gment are about as long as the segment lieariiig 

 them is thick; they are entirely smooth, with no trace of spimdes; thev have numerous tine 

 wrinkles; greenish-yellow at base, beyond, black; thev are .slightly enlarged at the end, which is 

 slightly divided, each fork giving rise to a seta nearly as long as the entire spine. (PI. LII, fig. 4.) 



The spines on the rest of the body (there being none on the prothoracic segment) are mimite, 

 smaller than in the other species, and much smaller- than in the next stage, but with a propor- 



