MEMOIltS OF THE NATIONAL ACADEMY OF SCIENCES. 179 



We retain the uaiiie Si/mmeristd beeause the lirst of the two species ineutioiied iiiuler it by 

 Hiibner is his S. olbicosta; tlie other species is iS. politia (Cramer). On exaniiuiiii; Cramer's figure 

 of poUtiii, thougli evidently poorly executed, we find that it diiiers jienerically from (ilhi/rons a.iid 

 (ilbivii.slii. ]Mr. Druee, in Bioloj;ia Centr. Anierieana, lleterocera, i, p. L'.">'.>, adopts Synuncrista for 

 (S'. polilia lliibner, aud retains Edema for albifrons. 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 Syiitmcrista pinna, from I'anuma (tig. 9, tab. 25), is represented as of the sha])e and with 

 the juarkiug of a Dasylojihia. Edema Mandela Druce loc. cit. (pi. 2."), fig. 3), from Mexico, is allied 

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



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

 kindly writes me, " a Noctuid of the genus Imjura, and identical with /. abri>.sti)l()ideii.-'' In 

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



Symmerista albifrons (Abl)ot :uul Smith). 

 (I']. IV, ti.i'S. 13, albioosta; 11, albil'nms.) 



Phalwiia albifrons Abbot aud Smith, Lep. lus. Georgia, p. 159, Tab. LXXX, 171)7, lig. 1. 

 Edema albifrons Walk., Cat. Het. Lep. Br. Mus., v, p. 1028, 1855. 

 Morris, Synopsis Lep. N. Amer., p. 242, 1862. 

 I'ack., Proc. Ent. Soc. Phil., iii, p. 3.58, 1804. 

 Si/mmeyista ulbiconta Uiihu., Verz. Schmett., p. 248; NoL-t..p. 440, 1810; Eur. Scbmett. Noct,, fig. 440. 1804* 

 llerr.-Sch. Syst. Bearb. Sehmett. Eur., ii, tig. 131, 1845. 

 Staudiuger, Cat. Lep. Eur., j). 75, uote. 1871. 

 Grote, New Check List N. Amer. iloths, p. 19, 1882. 

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

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

 Stjmmerista albifrons Neum. aud Dyar, Trans. .\mer. Ent. Soc, xxi, p. 187, .Tune, 1894; Jouru. N. Y. Eut. Soc- 

 ii, p. 114, Sept., 1894. 



Larva. 

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



Abbot and Smith, Lep. Ins. Georgia, p. 1.59, Tab. LXXX, 1797. {Larva, pupa, and moth tignred.) 



Emmons, Nat. Hist. N. York, v, p. 242, PL XXXVII. (Larva and pupa tigured.) 



Harris, Ent. Corresp., p. 304, 1869. 



French, Trans. Dept. Agr. IlL, xviii. Appendix, p. 120, 1880. 



Bentenmiiller, Ent. Araer., vi, p. 75, April, 1890. (Egg, all six larval stages, and oocoou described.) 



Di/ar. Psyche, v, p. 421, Nov.-Dec, 1.S90. 



Packard, Proc. Bost. Soc. Nat. Hist., xxiv. \>. 525, 1890. (Stages I-V describc(L) 



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

 in 9 . I'alpi brown on the sides. On the ci'est above, a brown line; behind is a median whitish 

 spot, with tawny scales, behind which are some bro\\n 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 mi(hlle of the wing, ami is a doul)le diirk line curved suddenly outward in the discal siiace; 

 behind, it is di-slocated 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 spot. From this tooth' 

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

 ■white costal margin is contracte(l upon the middle of the fourth subcostal venule, and thence runs 

 directly to the ape.x. The region below th^; white portion of the costa may be dark ash, tinged 

 more or less with fuscous. The subinaiginal region is a little lighter, inclosing a submarginal 

 series of inwardly obli(jue or bhick linear lunate spots. Hind wings smoky white. Beneath, the 

 wings are uniformly whitish; the submarginal row of spots ai)pear throu.gh. On the underside of 

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

 round spot. Expanse of wings, S , 30—45 ram.; length of body, S , 1()-18 mm. 



' My description is based on the sharp-toothed form, or albicoata Hiibn. (Eur. Schmett., fig. 440) ; the round-toothed, 

 form is .\bl)i)t aud .Smith's albifrons. Whether these variations also extend to the larva remains to be seen. 



