NORTH AMERICAN LEPIDOPTERA. 191 



H09ICE:0S0]U4 Curt. 

 (Type sinudla Fab.) 

 Steph., Brit. Ent. iv, p. .311, 1834; Zeller, Isis 1848, p. 585, 599; Hor. Ento. Soc* 

 Eoss. (C'hil. Cr. Phyc.) xvi, 237; Herrich-Schaeffer, Sys. Bear. Iv. 103. 1849; vou 

 Heiuemaun, Pyr. 196, 1865; Grote, Bull. U. S. Surv. Terr, iv, 703, 1878, N. A. 

 Ento. i, 12, 1879; Meyrick, Proc. Liuu. Soc. N. S. W. iii, 214, 1878, vii, 159, 1882; 

 Eafjouot, Ento. Mou. Mag. xxii, 26, 1885; Westwood, Class, ii, 113; Stephens. 

 Brit. Ento. Haust. iv, p. 311, 1834; Westwood and Humphrey, Brit. Moths i, 233. 

 1839. 



Phyciden Zell., Isis 1839, p. 178. 



Labial palpi ascending, rather weak, quite long, filiform, end mem- 

 ber about one-half middle member ; maxillary palpi distinct, filiform ; 

 tongue strong ; ocelli distinct ; antennae of % simple, the member 

 above the base having an excision or notch. Genitalia of % : uncus 

 light, after the normal pattern ; harpe broad, subtriangular, long 

 haired ; lower plate broad, short conical, with bristles on the outer 

 edge. Venation : fore wings 10 veins, 4 and 5 stemmed, 8 wanting ; 

 hind wings 7 veins, 2 quite distant from angle, 3 and 4 widely sepa- 

 rate, 8 very short stemmed with 7. 



This genus is known by the excision on the second member of the 

 Z antennae. In some of our species it is not very distinct, and the 

 tendency is evident in some species of other genera. But while thus 

 not sharply marked it is so peculiar that it affords a good generic 

 characteristic. 



Synopsis of Species. 



1. Fore wings pure white 2. 



not white 3. 



2. " broad, apex sharp, insect quite large iiiiprei^salis. 



narrow, apex rounded, insect quite small illuviella. 



3. ■■ lines indistinct or obsolete; shadow lines wanting 4. 



lines distinct with shadow lines 6. 



4. " with white costal stripe siJbei^ceiitella. 



without distinct costal stripe 5. 



5. Fuscous gray electella. 



Ochreous gray or white opalescella. 



6. Outer line angulate, within reaching to discal sj)ots Stypticellu. 



nearly straight 7. 



7. Basal shadow line a broad band 8. 



narrow niiieidolla. 



«. Black baud even iineanalis. 



" with a long angle at middle aiiguliferclla. 



1. H. impressalis Hulst, Trans. Am. Ento. Soc. xiii, 163, 1886. — Expands 

 25—30 mm. Palpi fuscous; head and thorax dirty white ; abdomen light fuscous- 

 white at tip. Fore wings white, a little peppered with black scales on anterior 



