254 MEMOIES OF THE XATIOXAL ACADEMY OF SCIEXCES. 



iiiuer edge. The discal liiieai- black spot very distinct and prolonged obliquely to the subcostal 

 vein, and also extenilinj;' to the origin of the first cubital venule, and from that point a black line 

 extends outward along the venule, ending in one of the subnuuginal series of bright sulphur- 

 yellow intervenular spots which are situated in the faintly marked dark liiiiules. A series of 

 dark brown lunules at the base of the fringe, which is white, faintly checkered with dusky at 

 the end of the lunules. 



Ilind wings whitish, with a dark costal oblique streak near the apex. 



Underside of the fore wings whitish, with three oblique browu streaks on the outer fourth of 

 the wing, just before the apex. 



Expanse of wings, 5 28-30 mm.; length of body, S 11 mm. 



To show that the genus Litodonta is probablj- not well founded, it may be said that JJ. atqwrba 

 is very near it, and differs mainly in the 3 antennae not having quite such long branches, and in 

 the thorax and fore wings being washed with tawny yellow instead of sea-green,' and in having 

 no submarginal yellow spots. Otherwise the two species are very closely allied, being of the 

 same size and with the same shape of wings. The female has not yet occurred, so that we do not 

 know the luiture of the antenna^ in that sex. 



Habits. — It is two-brooded, as the moths were collected in Texas in April and May and also 

 in July and August (Riley MS.). 



Geographical distribution. — Thus far this interesting species is confined to the Southern States 

 (Austroriparian subprovince), having occurred in Texas, where it has been collected by Belfrage, 

 and in Punta Gorda, Charlotte Harbor, Fla. (Mrs. Slosson); Texas (U. S. Nat. Mus.); Texas- 

 (Boll, Mus. Comp. Zool.); Texas (French). 



Heterocampa unicolor (Packard). 



(PI. y, fig. 20.) 



Lochmceus unicolor Pack., Proc. Eut. Soc. Phil., iii, p. 373, 1864. 

 Lochmaua marina Pack., Proc. Eut. Soc. Phil., iii, p. 37.S, 1864. 

 Heterocampa unicolor Grote, New Check List N. Amer. Moths, p. 19, 1882. 

 Popeuoe, 1st Rep. Kansas Exp. Stat., p. 35, 1888. 

 Smith, List Lep. Bor. Amcr., p. 31, 1891. 

 Kirby, Syn. Cat. Lep. Het., i, p. 564, 1892. 

 Misogada cinerea Neiim. and Dyar, Trans. Amer. Eut. Soc, xxi, p. 207, 1894; Jouru. \. Y. Eut. Soc, ii, p. 117, 

 Sept., 1894. 



Larva. 



(PI. XXXIII, figs. 4, 4«, ill, 4r. Stage I.) 



Harris, Eiit. Corresp., p. 301., PL I, tig. ii, 1869. (By error as S. biliiienta.) 



Eduards, Eiit. Amer., iii, j). 168, 1887. (Last stage.) 



Popenoe, l.st. Kep. Kansas Exp. Stat., 1888, p. 35. (Larval .Stages I. II, and last, with egg, pupa, and imiigo $ 



aud 9, figured liy Jlr. Marlatt.) 

 Drjar, Psyche, vi, p. 95, 1891. (Life history.) 

 Packard, Proc. Jouru. N. York Ent. Soc, i, p. 75, .Ian., 1893. 



Moth. — Five S , three 9 . Of a uniform pale cinereous, being of a faded appearance and with a 

 faint greenish tinge, without any band or spots; or pale sea-green; dusted very minutely with ashen 

 scales, or varying in the same brood to dark purplish gray, with transverse darker punctuated 

 scalloped lines. Costa very straight, compared with that of Jl/. viarthesia. A faint series of pale 

 longitudinal lines situated on the venules passing across the fore wings near their base. On the 

 outer third of the wing is a rather irregular curved series of dark spots bordered externally with 

 white; the ends of the venules are dark. With these exceptions there are no other markings, 

 the moth thus differing notably from its congeners; no part of the wing is darker than another, 

 and it has a faded look in very fresh examples, which is very unique in the genus. 



The head, palpi, pectus, and underside of the body in general are very pale clay and whitish 

 yellowish. The hind wings are pale ashen whitish, in some cases with a straight mesial, obscure 

 dark spot. 



' Dr. Dyar writes that lie believes that fresh miiierl/a are grceu, aud that the yellow tint is due to fading, as iu 

 II. biundata. 



