AMERICAN LEPIDOPTERA. 



349 



light gray, scarcely with blackish scales basally, but these increasing towards 

 onter margin ; central cross-line very faint, most sharply defined by a black dot 

 on inner margin: marginal lines blackish; disc^al spot faint; beneath as above, 

 paler, markings faint. 



Colorado, from Mr. Bruce. Female only. 



40. PTEROT^A n. gen. 

 Type cariosa Hulst. 



Palpi moderate, porrect, rough scaled ; tongue developed ; front 

 broad, rounded, scaled ; antennae bipectinate in both sexes, the pec- 

 tinations in 9 short ; thorax rough scaled ; abdomen smooth ; hind 

 tibial swollen ; fore wings 11 veins, 11 wanting; hind wings 5 unde- 

 veloped, 6 and 7 separate, 8 separate from cell ; fore wings even, 

 hind wings triangular, waved on outer margin. 



I have the 9 only ; the % almost certainly has fovea below on 

 fore wings, and probably has hair pencil on hind tibiae. 

 Species. — P. cariosa Hulst, n. sp. 



I». cariosa n. sp.— Expands 38 mm. Palpi, front and thorax blackish gray. 

 Abdomen with each segment dark fuscous, becoming black posteriorly, the ex- 

 treme posterior edge being light gray ; fore wings gray, pretty generally overlaid 

 with blackish, the gray showing more plainly on anterior middle field ; basal line 

 fine, blackish, not very pronounced, somewhat dentate, generally rounded, the 

 veins basally more blackish ; outer line fine, black, dentate, subparallel with 

 margin; a fine, evenly scalloped, whitish line in submarginal space; margin 

 scalloped and with a distinct, even, black marginal line, the black at the points 

 extending out on the veins ; hind wings color of fore wings, with the outer line 

 of fore wings extended across; submarginal white line faint; broken; margin 

 scalloped, edged with a distinct black line; beneath light fuscous, with dark fus- 

 cous pepperings, becoming entirely dark fuscous on apical portion of fore wings. 



Soda Springs, Cal., August, from Dr. Behreus. 



41. IXAL.A n. gen. 

 Type desperaria Hulst. 



Palpi rather short, porrect, rough scaled below ; tongue developed ; 

 front broad, rounded, short scaled ; antennte of % bipectinate, apex 

 ■ simple, pectinations long, filiform ; thorax smooth, somewhat hairy 

 below ; abdomen smooth, slightly tufted at end ; legs long, slender, 

 all spurs long and slender ; hind tibiae slender, without hair pencil, 

 with all spurs ; fore wings with fovea below in % , rather broad, 

 even, round*ed, 12 veins, 10 on 9, 11 from cell; hind wings with 

 subcostal fovea below at base, and with fold beneath on inner margin 

 with fringe of hairs within, 5 undeveloped, 6 and 7 separate, 8 sepa- 

 rate from cell. 



Species. — I. desjyeraria Hulst. 



TRANS. AM. ENT. SOC. XXIII. SEPTEMBER, 1896. 



