4m 



flic midilli', and dik' near tlic inner an<rlc of tlic wiiiir; in one siti^cinicn, the 

 inner two-tiiirds of (lie wina is paler, sonieuliaf wliiti.-h, Ihns a|i|)niiicliing 

 llic normal eolur of nyxscnia. The tiirei' speeiniens arc I'roni Del roil, Jlich. 

 (Swartz, Mns. Coiiip. Zofll.), I>re\\ sicr's, N. Y. (Grote), and IVoni Dalhis, 

 Tex. (Boll). 



Walker's nepiasatut (plate 1.'!, fii>-. Ai) is a small individual, \\ith the 

 middle of the fore willies yellowish and the remainder pinki.sh ; hind wings 

 yellow, outer third [)inkish. 



A fourth variety is represented hy llg.;jS,or\\ hieh the following is a descrip- 

 tion: 2 9 . — Cinereous, with an ol)sciire lilac tinge. I'alpi stout, long, pornicl, 

 tipped with l)lack. Head, hody, and wings at hase concolorous. On ihe line 

 wings.a l)road, zigzag, brow n line, pointed acutely lour times on the nervulcs, 

 tiie last time on the costa, shaded witiiin on Ihe costa : internal margin 

 strigated with black more than the re>t of the wing; middle of the wing 

 clearer than the base; outer line very large, elongated; angle ol)tuse, going 

 nuieh nearer the outer edge than usual ; ape.x rounded, not acute as usual ; 

 line fuscous; beyond tiiu ii-color,_ with a lilac tinge; a costal dark streak near 

 the apex, which is falcate, jjroduced a little more than usual, well excavated 

 beneath; angle: distinct in the middle, rounded, l)elow well excavated ; discal 

 dot indistinct on l)()th wings. Hind wings same as the fore wings, deeply 

 excavated on each side of the mesial, prominent, rounded angle. Beneath, 

 the body is fnsco-cinereous ; wings ochreous, with fuscous striga-, nuirgin 

 of Ihe w iug violaceous, except on the fore wing toward the costa, where it 

 becomes ochreous, and directly on' the costa whitish-cinereous. 



Lenglii of the body. 0.40; of fore wiuij;-, O..05 inch. 



Katick, August 2 (Stratton) ; Illinois (Clemens). 



This variety is easily known iiy the cinereous body, with the outer 

 margin fawn-colored, which lu'couies violaceous on the under side, and 

 without the usual dark, violaceous s])ots on Ihe margin near the inner angle; 

 beneath, more distinctly ochreous than usual; the apex is falcate, as usual, 

 and the mesial prominence well marked ; the angle of the outer line is also 

 more produced, and ends in an oi)tuse, rounded point. 



This species is so exceedingly variable that no one can be i)lamed fl)r 

 regarding the more aberrant forms as good species, if they have but a single 

 specimen; but, with the excellent material 1 have had, 1 have little hesita- 

 tion in regarding the synonymy given above as approximately correct, and 



