TttE CANADIAN ENTOMOLOGIST. 219 



and ornamental differences, evident though they are, but because the 

 male genitah'a show a sh'ght, though constant, difference in form, and a 

 very decided one in size, the eastern form having the harpes much larger 

 and stouter. 



Two males are at present before me, and Mr. Hanham has other 

 specimens similar in appearance. 



Main est 7- a negus s a, n. sp. 



Ground colour mouse-gray, varying a little in the amount of reddish 

 shading. Head usually a little paler ; but else no maculation. Primaries 

 with the usual maculation all present ; but nothing at all relieved or 

 contrasting. Basal line geminate, included space a little paler, extends 

 to the internal vein, inwardly toothed on the cell. T. a. line geminate, 

 included space a little paler, inner portion often lost, outer brown or 

 blackish, as a whole with a rather even outcurve, a very little toothed on 

 the veins, tending to become distant from base so as to narrow the 

 median space. S. t. line geminate in the costal region, else mainly 

 defined by the slight contrast between median and s. t. spaces \ when 

 there is no such contrast the line is practically lost or marked by venular 

 dots only. In course it is sinuate, incurved below the cell. S. t. line 

 pale, a little irregular, in light specimens mainly defined by the darker 

 terminal space. A series of very small, black, terminal lunules, which 

 may be wanting. Fringes narrowly cut with pale and with a pale line at 

 base in light specimens. Median shade obscure, outwardly oblique from 

 costa between the ordinary spots, darkening the reniform inferiorly, then 

 close to t. p. line, somewhat deepening the shade of the outer portion 

 of median space. Claviform small, barely traceable or altogether wanting, 

 a trifle paler in dark examples. Orbicular oval, oblique, of good 

 size, varying a little in form, pale ringed and usually altogether a little 

 paler. Reniform moderate, kidney-shaped, tending to enlarge a little 

 inferiorly and there dark filled ; narrowly pale ringed. Secondaries 

 smoky, basally a little paler, with a dark discal lunule, a blackish 

 terminal line and pale fringes. Beneath gray, powdery, with a smoky 

 or blackish shade line hardly beyond the middle, and a discal spot on all 

 wings. 



Expands 37-40 mm. = 1.48-1.60 inches. 



Habitat : Calgary, Canada, mouth of Fish Creek, on Sallows, May i, 

 4 and 14 (Mr. F. H. Wolley Dod). 



