AMERICAN LEPIDOPTERA. 355 



suddenly shortening to simple apex, the antennae generally plumose, 

 of 9 filiform or serrate ; thorax scaled, sometimes tufted posteriorly, 

 somewhat hairy below ; abdomen scaled ; hind tibiae often swollen, 

 with all spurs, without hair pencil in I ; fore wings 12 or 11 veins, 

 varying in the same species, even, with fovea below in % ; hind 

 wings 5 undeveloped, 6 and 7 separate, 8 separate from cell, the 

 wings rounded, even, or slightly wavy. 

 Species : — 



_S. muricolor Hulst, n. sp. S. puhnonarmm Grt. 



I S. correllatiun Hulst, u. sp. S. humarium Guen. 



S. wruj hilar iam Hulst. S. umbrosarium Guen. 



S. fuligmarium Hulst. S. albescens Hulst, n. sp. 



S. muri<iolor n. sp. -Expands 34-36 mm. — Palpi, front and antennae dark 

 sordid fuscous; summit, thorax and abdomen light gray; all wings very smooth, 

 even fuscous, or fuscous gray, without lines or spots ; fore wings with costa and 

 apical space, hind wings with outer space and inner margin slightly darker ; 

 margins with fine, intervenular, black dots; hind wings somewhat rounded out 

 at vein 4 ; beneath almost exactly as above. 



Hazleton, Pa., from Dr. Dietz. Very much in color like Dias- 

 tictis incepfata Walk. ( argil lacearia Pack.), differing by the less 

 rounded fore wings, the obtusely angled hind wings and the plumose 

 antennae. 



S. correllatum n. sp. — Expands 28-30 mm. Palpi and front fuscous to dark 

 fuscous; thorax fuscous gray to whitish fuscous. Abdomen whitish or grayish 

 fuscous ; fore wings white, or light bluish gray, somewhat scattered over with 

 darker scales; basal line black, geminate, often indistinct, especially on cell; 

 middle line indistinct, or a faint fuscous shading; outer line black, curved, gemi- 

 nate, more widely separate subcostally, with a reddish included shading on third 

 quarter from costa. Wings slightly falcate : marginal line broken, black, heavier 

 subapically ; hind wings whitish or light gray, more fuscous along inner margin ; 

 all wings with distinct black discal spots; beneath light gray, heavily powdered 

 with fuscous, discal spots distinct, diffuse, black. 



Colorado, California, Oregon ; the Oregon specimen taken August 

 24th. 



S, albescens n. sp. — Expands 42 mm. Palpi blackish ; front blackish, with 

 a line of white along summit; rough, somewhat overhanging .scales between an- 

 tennae, whitish on edge, blackish in middle; collar light gray, blackish behind; 

 thorax whitish gray, with low posterior tufts. Abdomen whitish gray, with 

 black speckles above, fuscous stained towards end. Wings even, clear whitish 

 gray, with a few black scales ; fore wings with black basal line, bent, rounded 

 out most strongly on costal half; middle line at discal point, black and distinct 

 at costa, showing in black spots across wing parallel with basal line ; outer line 

 black, running very much as in larvaria ; a row of marginal black spots; hind 



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



