MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 99 



Larnt. 



(PI. V, tigi^. l-o; XXX, XXXI. tig. 1; L, figs. 2-2d; LI, figs. 2--_V; LII, figs. 3-3c. ) 



Smith-Abbot, Xat. Hist. Lep. Ins., Georgia, p. 111. Tab. 56. 1797. 



Lintner, J. A., 23d Rep. N. Y. State Cabinet, p. 190. 1873. 



Riley, C. V., in Packard's Re]). U. S. Ent. Commission, insects inj. to forest trees, p. 126. 1890. 



Packard, A. S., Proc. Anier. Phil. Soc, p. 146. JIaroli 17, 1893. 



BeutenmiiUer, 11'., Cat. bombycine moths, X. York, p. 439. 1898. 



Marlatt, C. L., Trans. Kansas Acad. Sc, 1887-88; XI, p. 111. Figs. 1889. 



Imago. — 4 (? and 5 9. Head, front, and antenuii; as in ^1. Henatoria ViViiS. A. virginleiisiti, 

 there being no marked differences; tip of antennaj tiliforni, with long- tine setfe on each side. 



Fore wings of S triangular, rather broad, costa much curved toward the obtu.se apex; outer 

 edge nearly straight, a little convex, slightly longer than the inner edge. Hind wings of the 

 normal shape, though short; apex much rounded, and outer edge full and convex, not triangular, 

 and iiuier angle not partly produced. They reach nearer than in the other species to the end of 

 the abdomen; in 9 they are much larger. Fore wings of 9 more ])roduced toward the apex and 

 reaching to the outer fourth of the abdomen. 



Bodv and wings dark reddish ochor, fore wings opaque in the middle, the base of the wings 

 and the outer edge beyond the extradiscal line tinged with lilac. Basal line ob.solete. Extradiscal 

 line dark, in some examples slighth- sinuous. Discal spot white, round or subtriangular, 

 conspicuous. Wings speckled with scattered dusky strigas which are rather heavj' and distinct, 

 especially on the fore wings and outer edge of the hind wings. The latter of the same hue as the 

 anterior pair; the extradiscal line varies in distinctness. Under side more ocherous. the common 

 extradiscal line distinct and var^-ing in width, being in some very liroad and diffuse; the outer 

 edge of the wing lilac and contrasting more than above with the inner ocherous region and more 

 heavily .strigated than above. 



Expanse of fore wing S 47 mm.; 9 .>j-t>0 mm. Length of a fore wing S 23mm.; 9 3(1-34 

 mm. Breadth of a fore wing $ 11mm.; 9 1.5-17 mm. Hind wings, length <? Itimm. : 9 1S-2U 

 mm. Hind wings, breadth S 12 mm.; 9 14-15 mm. 



This is the most generalized species of the genus, at least of those inhabiting the United 

 States. The two sexes are much alike, the hind wings of the S being of nearly the same shape 

 as in the 9 and not triangular, though short, and the 9 has nuich larger and longer wings, those 

 of the hinder pair being produced toward the apex. 



A male in Mr. Doll's collection, at the Brooklyn Museum, is luiusually l)huk. the .--triga^ on 

 the fore wings being confluent; the outer edge of the wing is almost black- lirown. The discal 

 spots are very distinct. It was collected on Long Island. 



Egg. — Flattened elliptical, as usual; shell thin, parchment-like, the surface marked with very 

 obscure, irregularh' hexagonal areas, which are not much crowded. Length, If; width, 1] nun. 



A lot of eggs were sent me from Al))any, N. Y.. by Mr. Joutel. Tliev hatched July 14 at 

 Brunswick, Me. 



Larva — Stage I. — Length. 3i to 4i and ."> mm. Head ruundcHl. wliolly hlaik. Body pale 

 pea-green, with a very slight, yellowish tint; abdominal legs green: thoracic legs pale, dusky 

 amber, becoming darker toward the claws; protht>racic shield usually forming a dusky patch 

 extending across the .segment, but sometimes the shield is pale. All of the minute tubercles 

 (spines) are green and not distinguishable from the body; they are low and minute. Those on 

 the abdominal segments are minute, low, conical, green, and dithcult to distinguish. The hairs 

 are horn-colored. The two iiorns on the second thoracic segment are greenish at base, black 

 bej'ond, while the seta? are black. In the living larva> they are always directed forward. They 

 are about as long as the body is thick (Fl. L, tig. 2), and. as usual, with only the two terminal 

 bristles. The tubercles on the segmehts behind the second thoracic are minute, low, with rather 

 long seta?. The median one on segment IX is low, faint, not chitinized, giving rise to two long 

 bristles. The suranal plate is pale, of the color of the body, not pigmented, and is rounded; the 

 two terminal tubercles are small, weak, not chitinized, and smaller thai; the two on each side near 



