TRIFID^. 175 



a rather more dull and browner form, known under the name 

 of siihjuncta, Grote, it is found throughout the Northern and 

 Middle United States, Canada, Ohio, Minnesota, Colorado, 

 Nebraska, Oregon and New Mexico ; being in at least some 

 portion of this range double brooded. Another variety, from 

 California and the Sierra Nevada, is known as Ncvadcc. 



3. H. suasa, Bkh. ; dissimilis, Stand. Cat. — Expanse, 

 I2 to If inch. Fore wings narrow, rather pointed, pale 

 brown, more or less marbled with purple-brown ; two upper 

 stigmata obscurely paler; claviform stigma conspicuously 

 long and black ; subterminal line sharply pale yellow, forming 

 a very complete W. Hind wings grey brown. 



Antennee of the male simple, minutely ciliated, light 

 brown ; palpi short, broadly tufted, brown mixed with black ; 

 head purplish-brown; collar erect, pale purplish-brown, sharply 

 barred with black ; rest of thorax jDale purple-brown, strongly 

 crested, the crests both at top and back barred with dark 

 brown and tipped with white ; fascicles spreading, dusky 

 yellowish-white ; abdomen profusely covered at the base with 

 long pale hair-scales rather curled up ; dorsal ridge orna- 

 mented with a series of small depressed dark-brown crests 

 partially concealed by the pale scales ; remainder purplish- 

 brown ; lateral and anal tufts more reddish. Fore wings 

 narrow and rather pointed ; costa nearly straight ; apex 

 rather pointed, but not sharply so ; hind margin oblique, 

 gently rounded ; dorsal margin almost straight ; colour very 

 pale umbreous brown, with all the middle area shaded with 

 purplish-brown ; from the middle of the base is a long, 

 distinct, black streak, and above it along the costa usually a 

 stripe of rather pale ground colour in which a couple of 

 cloudy dots represent the basal line ; first line perpendicular^ 

 duplicated, formed into three or four crescents, the outer 

 portion blackish, the inner faintly brown ; second line placed 

 but little beyond the middle, single or sometimes faintly 

 duplicated, formed into a series of black crescents, but 



