174 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Agroiis orhis. — Closely allied to alternata. Stigmata complete j orbi- 

 cular very small, pale-ringed, spherical. Unicolorous olivaceous-gray, 

 shining; terminal space hardly paler. Possibly a variety of alternata^ 

 but the spots are concolorous. 



Agrotis emarginata. — Rather narrow-winged. Dark purple brown; 

 concolorous; ornamentation subobsolete; lines darker than the wing; 

 orbicular incomplete above. Collar with a distinct, black, superior 

 edging. 



Agrotis facula. — Broader and shorter-winged than emarginata. Brown, 

 with the primaries overlaid with lilac- gray, especially on costa and over 

 stigmata. Cell shaded with black between the ordinary spots and before 

 the orbicular; the latter absorbed into the gray costal shade. Collar 

 with a very fine blackish edging. 



Agrotis formalis. — Collar with a fine, mesial, white line; upper portion 

 black. Colors of facula^ but without black on disk and before orbicular. 

 Gray costal shade evident. 



Agrotis observahilis. — Collar with upper half black ; lower part reddish 

 or ochrey. Costal margin reddish; varies by the presence of black on 

 the cell and before the orbicular, or its absence when these places are 

 sometimes olivaceous or reddish. A black basal dash; claviform dis- 

 tinct. The collar is similar to formalis; but the color is different, being 

 fuscous, overlaid with reddish and olivaceous. 



Agrotis bicollaris. — Looks like a small, pale cupidissima, but the collar 

 has a mesial black band. 



AGEO'i IS PLUE-ALIS, 71. sp. 



9. — All the tibiae spinose. Allied to pleuritica, but the orbicular is 

 oblique, subquadrate. Gray and pale ochreous. Fore wings gray along 

 costal and internal margins, diffusely shaded with pale yellowish-ochrey 

 from the base over the claviform along submedian fold to subterminal 

 line and again beyond the reniform. All filled in with brown. Stigmata 

 gray, whitish-ringed; reniform upright; orbicular oblique, quadrate; 

 claviform faintly outlined, absorbed by the ochre shading. Lines gem- 

 inate, marked on costa, subobsolete ; subterminal pale, irregular; termi- 

 nal space gray; terminal line black, subcontinuous. Yeins marked 

 with blackish; veins 3 and 4 edged with whitish ; a dark shade before 

 subterminal line resolved into dashes or cuneiform marks between veins 

 2 and 5, Fringes gray, interlined; externally brown, dotted opposite 

 extremity of veins. Hind wings smoky, subhyaline toward the base ; 

 fringes white, interlined. Thorax gray; collar at baKse light ochrey; 

 tegulse lined within with ochreous. Beneath white, powdered with fus- 

 cous ; double obliterate lines and discal marks ; abdomen whitish above, 

 darker beneath. 



Expansion, 38 millimetres. Two specimens, Nevada (coll. Dr. Bailey). 



With differently colored shadings, this species recalls milleri, but the 

 stigmata are differently shaped and the t. p. line has a different expres- 

 sion. 



