MEMOIRS OF THE NATIONAL ACADEMY OP SCIENCES. 179 



We retain the name Si/iiimeri.sta because tlie first of the two species mentioned under it by 

 Hiibiier is his 8. albicostu: the other species is S. poUtin (Cramer). On examining Cramer's tij^ure 

 of politki, though eviileutly poorly executed, we find that it differs generically from ulbifrons and 

 ttUncosta. Mr. Druee, in Biologia Centr. Americana, Heterocera, i, p. 1.'30, adopts Symmerista for 

 jS'. pal if in Iliibiier. and retains Edema for olhifrons. This does not seem to us to be .justifiable, and 

 we think another name should be given to the genus of which politia Cram, is the type. ^Moreover, 

 Druce's Si/mmerisUt piiina, from Panama (fig. 9, tab. 25), is represented as of the shape and with 

 the marking of a Dasyloplii;i. Edema Mandela Druce loc. cit. (pi. 25, fig. 3), from Mexico, is allied 

 to S. albifrons, and is a true Symmerista, as we have restricted the genus. 



Walker's Edema prodiicta, from St. Johns Bluff, in eastern Florida, is, as Mr. A. G. Butler 

 kindly writes me, "a Noctuid of the genus Intjnra, and identical with I. ahrostoloides.''' In 

 Druce's Heterocera, i, p. 235, it is still retained under Edema. 



Symmerista albifrous (Abbot and Smith). 

 (I'l. IV, figs. 13, albicosta; 14, albifrous.) 



Phahiiia alhifruns Abbot aud Smith, Lep. lus. Georgia, p. l.")9, Tab. LXXX, 1797, fig. 1. 

 Edema alhifnins Walk., 'Cat. Het. Lep. Br. Mus., v, p. 102S, 1855. 

 Morris, Synopsis Lep. N. Araer., j). 242, 1862. 

 raclc. I'roc. Ent. Soc. Phil., iii, p. 358, 1864. 

 Symmensta albicosta Bnhn., Verz. Schmett., p. 248; Noct., p. 440, 1816; Eiir. Schmett. Noct., fig. 440, 1804 f 

 Herr.-Sch. Syst. Bearb. Schmett. Eur., ii, tig. 131, 1845. 

 Staudiuger, Cat. Lep. Eur., p. 75, note, 1871. 

 Grote, New Checls; List N. Amer. Moths, p. 19, 1882. 

 Smith, List Lep. Bor. Amer., p. 30, 1891. 

 Kirby, Syn. Cat. Lep. Het., i, p. 572, 1892. 

 Symmerigta albifrous Neum. and Dyar, Trans. Amer. Ent. Soc, xsi, p. 187, .Tune, 1894; Journ. N. Y. Ent. Soc. 

 ii, p. 114, Sept., 1894. 



Larva. 

 (PI. XXII, figs. 1-4.) 



Abbot and Smith, Lep. Ins. Georgia, p. 1.59, Tab. LXXX, 1797. (Larva, pupa, aud moth figured.) 



Emmons, Xat. Hist. N. Yorli, v, p. 242. PI. XXXVII. (Larva aud pupa ligured.) 



San-is, Ent. Corresp., p. 304, 1869. 



French, Traus. Dept. Agr. 111., xviii, Appendix, p. 120, 1880. 



BeutenmiiUer, Eut. Amer., vi, p. 75, April. 1890. (Egg, all six larval stages, aud cocoon described.) 



Dijar, Psyche, v, p. 421, Nov.-Dec, 1890. 



Packard, Proc. Best. Soc. Nat. Hist., xxiv, p. 525, 1890. (Stages I-V described.) 



Moth. — Six S and two 9 . Cinereous; head and prothorax tawny and whitish in front; paler 

 in 5 . Palpi brown on the sides. On the crest above, a brown line; behind is a median whitish 

 spot, with tawny scales, behind which are some brown scales; the rest of the thorax is dark ash. 

 Fore wings with two dark lines situated within the middle of the wing; the first basal one is light, 

 with two scallops, one on the costa margined within with dark; the outer one is situated within 

 the middle of the wing, and is a double dark line curved suddenly outward in the discal space; 

 behind, it is dislocated on the subcubital fold; it ends on the beginning of the white portion of 

 the costa, which is one-toothed just beyond the brown, pale-edged discal sjiot. From this tooth' 

 an obsolete tiiird line runs parallel to the second to beyond the middle of the internal edge. The 

 white costal maigin is contracted upon the middle of the fourth subcostal venule, and thence runs 

 directly to the apex. The region below the white portion of the costa may be dark ash, tinged 

 more or less with fu.scous. The submargiiial region is a little lighter, inclosing a submargiual 

 series of inwardly oblique or black linear lunate spots. Hind wings smoky white. Beneath, the 

 wings are uniformly whitish; the submargiual row of spots appear through. On the underside of 

 the hind wings is an obscure fu.scous median line. On the first segment of the abdomen is a dark, 

 round spot. Expanse of wings, 5 , 36-4:5 mm.; length of body, S , 16-18 mm. 



• My description is based on the sharp- toothed form, or albieostaWiihx^. (Eur. Schmett., fig. 440); the round- toothed 

 form is Abbot and Smith's albifrons. Whether these variations also extend to the larva remains to be seen. 



