296 AUG. R. QROTE. 



Mr. Ridings from Georgia. It may be found to vary, as neither of its 

 allies are constant, but its characters are so simple that I should 

 think its identification would be always ready. It expands only 

 12 m. m, 



ERASTRIA, Treits. 

 Erastria mitographa, Grote.— % $?•— Grey with obscure olivaceous 

 shades, finely sprinkled with black scales. Head and collar discolorous, ob- 

 scure yellowish. Thorax grey. Fore wings with two distinct median lines 

 very even. T. a. line deep bright olivaceous, with a pale following inner shade, 

 broken by an inward angulation on the cell below costa, thence evenly in- 

 wardly oblique to internal margin. Eeniform ill-defined, medially constricted, 

 pale, with dark superposed included dots. Behind the reniform, the median 

 space is shaded with obscure olivaceous. T. p. line resembling the t. a. line in 

 color, succeeded by a coincident pale shade, outwardly acutely angulate on the 

 subcostal nervures, thence evenly inwardly oblique to internal margin. These 

 two median lines are parallel inferiorly, tolerably approximate, narrowing the 

 median space. Subterminal shaded line vague, following the shape of external 

 margin. Terminal space darker shaded outwardly. Faint ante-apical costal 

 pale marks. Terminal line pale, very fine and continuous. Fringes dark at 

 base, pale exteriorly. Terminally the wing shows the same bright stain that 

 characterizes the deep olivaceous median lines. Hind wings obscure greyish 

 without perceptible markings. Beneath the fore wings are washed with black- 

 ish from the base outwardly over the middle; hind wings pale, both pair 

 tinted with obscure yellowish or ochreous, .with double shaded common lines 

 and pale fringes. Abdomen untufted above. Expanse 21 to 22 m. m. 



Habitat.— Central Alabama, in August. 



The prominent median lines are very distinctive. With the follow- 

 ing similarly sized with E. muscosula. 



Erastria lualaca, Grote. — % $?• — Slight-bodied, the labial palpi a little 

 longer than in E. mitographa. Pale with a purplish reflection, with ochrey- 

 brown shades and diffuse ornamentation. Head and appendages and collar 

 discolorous, obscure yellowish or ochreous. Fore wings acute at apices.; ex- 

 ternal margin somewhat sinuate, well produced medially. Fore wings pale 

 from base to median shade; t. a. line diffuse, a little irregular, broadly marked 

 on costa. Between the median shade and the t. p. line the median space is 

 filled in with oehrey brown obscuring the reniform spot; this latter darker 

 ringed with a brighter centre. T. p. line tolerably distinct and linear, followed 

 by a coincident pale shade. It is even, roundedly projected opposite the disc, 

 subsinuate. Ante-apical pale costal dots. Terminally the wing is diffusely 

 washed with brown. A pale oblique apical shade, below which the vague un- 

 dulate diffuse dark subterminal line is visible. Terminal line very fine and 

 dark, continuous; fringes dark. Hind wings as in E. mitographa, without 

 markings; fringes pale. Beneath with ochreous tint, primaries blackish over 

 the disc, with discal dots and faint common lines. Abdomen untufted above. 



