AMERICAN LEPIDOPTERA. 283 



M. etiiela n. sp. — Expands 30 mm. Palpi and head fuscous ochreous ; an- 

 tennae fuscous; thorax fuscous ochreous. Abdomen fuscous gray; fore wings 

 cream color from base one-third out, with a shading of blackish scales along costa 

 at base, terminated outwardly by a rounded dentate line ; beyond, a broad dark 

 gray band with veins all somewhat darker lined, this baud sciilloped outwardly, 

 the scallop being most prominent at vein 4, and the dentations marked by the 

 veins; beyond this band a cream colored line broadening towards costa, followed 

 by a broad dark gray submarginal band, which is somewhat reddish next to the 

 cream colored line ; margin blackish ; hind wings whitish, a little fuscous tinted 

 outwardly, with line of blackish marginal spots along outer border; beneath 

 light cream fuscous, with darker outer shadings; hind wings whitish fuscous. 



One % Sierra Nevada, California. 



32. HYDRIOMENA Hub. 

 Verz. 322, 1818. 



Type trifasciata Bork. 

 Euphyia Hiib., Verz. 326, 1818, type picata Hiib. 

 f Perisoma Hiib.. Verz. 331, 1818, type adsequata Bork. 

 f Enfephria Hiib., Verz. 331, 1818, type Jlavicinctata Hiib. 

 Chlorodysta Hiib.. Verz. 332, 1818, type miata L. 

 Dysstroma Hiib., Verz. 333, 1818, type iruncata Hufn. 

 Harpahjce Steph., Cat. ii, 131, 1829, type fulvata Forst. 

 Ypsipetes Steph., Cat. ii, 138, 1829, type trifasciata Bork. 

 Einmelesia Steph., Cat. ii. 147, 1829, type decolorata Hiib. 

 Msesia Steph., 111. iii, 150, 1831, type decolorata Hiib. 

 Poli/phrasia Steph., 111. iii, 227, 1831, type immanafa Haw. 

 Enthalia Steph., 111. iii. 252, 1831. type miata L. 

 Thera Steph.. 111. iii. 271, 1831, type simnlata Hiib. 

 Phasylc Dup., Cat. Meth. 254, 1844, type malvafa Eamb. 

 Ceratodalia Pack., Geom. Moths. .322, 1876, type gueneata Pack. 



Palpi moderate or long; tongue of % developed; front with or 

 without scale tuft ; antennae flattened, often naked, shortly and finely 

 ciliate below ; thorax ,vith posterior tuft more or less developed. 

 Abdomen often tufted at end ; hind tibise with all sjDurs ; fore wing.« 

 with two accessory cells, 12 veins; hind wings 8 veins, 6 and 7 

 stemmed, 8 with cell to beyond middle. 



Tins genus, with what I have placed under Mesoleuca, Cceiiocalpe, 

 Trijjhosa, Enchoria and (jri/psoehroa, are all grouped by Mr. Mey- 

 rick under Hijdriomeim. He recognises there are very considerable 

 diffei'ences in structure which would easily warrant generic separa- 

 tion, but tliinks the species .so intergrade in every structural point 

 that it is impossible to draw a distinct line anywhere. I agree with 

 him entirely, yet think it wiser to draw an artificial Hne than to 

 lump very widely variant species under one genus, wliicli thus be- 

 comes very large and unwieldy, as well as discordant. In very few 



TKANS. AM. ENT. SOC. XXIII. AUGU.ST, 1896 



