AMERICAN LEPIDOPTERA. 237 



more obvious or confined to lower half: costal region of the dark ground. In the 

 female the contrast is sometimes very slight, and the reddish shade is always 

 confined to the lower thii-d of space. In the male there is usually a reddish tinge 

 in the base as well, and this is sometimes traceable in the female. A short curved 

 black basal mark extends to the basal line, somewhat emphasizing it. T.a. line 

 obviously geminate, quite regularly outcurved, the inner line distinct, included 

 space whitish and linear. Sometimes this white included space is about the only 

 part of it that is visible. T. p. line somewhat squarley exserted over the reui- 

 forra, then evenly incurved to inner margin, narrowing the median space quite 

 obviously in some males. S. t. line quite well defined by the contrast between 

 the darker terminal and light s. t. space. In course it is somewhat irregularly 

 sinuate. The apex is hardly paler in most examples. Claviform marked in 

 black, but scarcely visible in the dark ground. Orbicular round or nearly so, 

 small, pale ringed, centered by the ground. Reniform whitish ringed, in the 

 male a little lighter, in the female about the same color as the dark ground. 



Hab. -Size and general structure as already described. 



The more closely I study this series the more am I convinced it 

 is a good one. It is not altua, which is probably a true race of 

 olivacea ; and it is not lucina, which stands in a parallel position. It 

 is perhaps a species Dariviniana, well advanced and ready to sup- 

 port itself. It has a smoother, less powdery appearance than any 

 of its immediate allies. 



IVIainestra daveua n. sp. 



Maculation of the normal olhacea type ; but brighter, more contrasting, a 

 leather-brown stain preceding the t a. line, and a similar one beyond the sinus 

 of the t. p. line opposite the hind angle. Front brown and white mottled, with 

 a deeper brown line across the front. Collar with a blackish line across the mid- 

 dle, below which it tends to reddish brown, above to smoky or darker. Thorax 

 with quite a prominent brown thoracic tuft, patagise gray or gray mottled ; disk 

 gray or smoky. Abdomen of the usual dull gray. Primaries with the macula- 

 tion well written on the two examples before me. Basal line geminate, black, in 

 one example white filled, in the other a lighter shade of the smoky ground. A 

 short curved black basal dash. T. a. line well removed from base, outwardly 

 oblique and outcurved, reaching the inner margin at almost its middle; geminate 

 inner line obscure, white or pale filled. T. p. line squarely exserted over the 

 reniform, theu with a well-marked incurve below. It is obscurely geminate, the 

 outer line faint, included space white or gray. S. t. line narrow, white, a little 

 irregular. A series of pale points at the ends of the veins. A very narrow 

 dusky line at the base of the fringes. Terminal space dark ashen gray, except at 

 tip, where it is whitish. S. t. space whitish, except on costa, where it is smoky, 

 and toward inner margin where it is flushed with reddish brown. Claviform 

 faintly traceable, concolorous, outlined in black, short and broad. Orbicular 

 oval, oblique, of moderate size, black ringed, narrowly annulate with white, a 

 little paler filled than ground color. Reniform upright or nearly so, oblong, with 

 corners rounded, white or gray filled. Secondaries a little smoky, fringes white; 

 a very obscure discal lunule. Beneath smoky gray; secondaries paler, more 

 powdery, with a blackish discal spot. 



Expands 26-27 mm. = 1.04-1.08 inches. 



TRANS. AM. ENT. SOC, XXVII. JUNE, 1901. 



