xo. 2239. NEW LEPIDOPTERA FROM MEXICO— DYAR. 357 



Genus SYMMERISTA Hubner. 



SYMMERISTA ODONTOMYS, new species. 



Dark purplish gray; head, collar, and center of thorax wood- 

 brown; fore wing with a yellow-white costal stripe from apex to 

 outer third of cell, the veins in it white, and sending a v;hite tooth 

 just beyond reniform; an angle on vein 7 and a slight one on vein 8; 

 lines obscure, blackish, double; subterminal line most distinct, 

 coarsely dentate, single; reniform a brown dash in a pale cloud; 

 some brown effusion beyond cell. Hind wing and abdomen dark 

 gray-brown. Expanse, 42 mm. 



Type.— Female, Cat. No. 21272, U.S.N.M.; Zacualpan, Mexico, 

 September, 1915 (R. Miiller). 



POSTANITA, new genus. 



Hind wing with vein 5 very weak, nearly absent; fore wing with 

 accessory cell; male antennae pectinated but not to the tips, of fe- 

 male, simple ; vein 8 of hind wing diverging from subcostal near end 

 of cell. 



If vein 5 be counted as present, the genus falls near Litodonta 

 Harvey ; but that has vein 5 stronger, female antennae pectinate, and 

 fore wing below with long, downturned hair in both sexes. 



Type of the genus. — Postanita decurrens, new species. 



POSTANITA DECURRENS. new species. 



Male. — Basal area wood-brown, narrow, limited by the subbasal 

 line, which is broken into dots and has a pale outer border; inner 

 space filled with dark purple-broAvn, running out obliquely on costa 

 and curving out along submedian fold, but resolved into a dotted 

 area along inner margin to outer margin at vein 2; outer field yel- 

 lowish wood-brown ; a small fuscous discal dot ; a gray shading from 

 cell to margin in a streak along vein 5 and patch above ; some dark 

 brown subapical marks on costa. Hind wing whitish wood-brown, 

 costa and margin grayish; some brown marks at anal angle. Ex- 

 panse, 27 mm. 



Type.~M.a\e, Cat. No. 21273, U.S.N.M.; Mexico (R. Miiller). 



Female. — Basal area of fore wing as in male, but the subbasal line 

 and a central arc of the inner line distinct, limiting the purple area, 

 the former line dentate on subcostal and vein 1 ; discal dot very large, 

 round, black-brown; a wedge-shaped dark brown patch, beginning 

 on vein 5 beyond the cell and widening to subterminal line, where 

 it is diffusely cut off; subterminal line indicated below; a brown 

 dash at vein 2 on margin; clear area of wing more irrorate with 

 brown than in the male. Hind wing solidly chocolate brown. Ex- 

 panse, 31 mm. 



