178 



Larciiliu duhiliuia ]ii)isil., (ieii. 1ml., 205, 1840. 



H.-Soh., Schm. Eur., iii, 142, 1847. 

 TriphoM iluhitata Stepli., Cat, Br. Lep., 209, 1850. 

 Scolosia hwaitata Gucn., Plial., ii, 444, 1857. 

 Scotoaia duhltala Gvieii., Phal., ii, 445, 1857. 



Walk., List Lep. Hct. Br. Miis., xxv, 1342, 1862. 



3 (? and 1 9. — This is a large, pale-cinereous species, with a reddish 

 tinge. The fore wings are crossed by three reddish, zigzag bands, the basal 

 one being curved angularly on the costa; beyond are three very zigzag lines, 

 interrupted by two paler bands ; the middle reddish band is less curved than 

 the basal one, accompanied on the inner side by a dusky band; this line 

 contracts slightly opposite the small, dark, narrow, oblique, discal spot, which 

 is nearer the line tlian in the European specimen ; this line also contracts on 

 the inner edge; the outer line is irregularly scalloped, but is straight on the 

 costa, with a subacute, curved angle on the lower subcostal nervule, below 

 which is a broad, regular sinus, rounded out, terminating in the middle of the 

 first median space, but not nearly upon or just below the first median nerv- 

 ure, as in the English specimen ; below, tiie line is regularly scalloped 

 between the nervules ; beyond, the submarginal line is much more dusky 

 than in the English moth, with two faint rows of white strigse on the nerv- 

 ules, with a distinct, white, submarginal line, and a l)lack, linear, scalloped 

 line; fringe dusky. The hind wings are crossed hy two distinct, but ralher 

 diffuse, dusky, submarginal lines, which are more distinct beneath, and do 

 not appear in the English specimen ; beneath, it is more dusky than in the 

 specimen from England, with the outer line on the fore wing differing from 

 the European moth as described above. 



Length of body, J, 0.70, ?,0.r)5; of fore wing, c?, 0.1^5, 9,0.80; expanse 

 of wings, 2.00 inches. 



Caribou Island, Straits of Belle Isle ; Montreal, Canada (Lyman); Eagle 

 Lake, Northern Maine, early in September' (Packard) ; Brookline, Mass., 

 May 21 (Shurtleff) ; Sierra Nevada, Cal. (Edwards). 



Specimens of this species, which were collected in Hudson's Bay Terri- 

 tory by Barnston, and also in Canada^ were referred by Mr. "Walker, in the 

 Catalogue; of the Lepidoptera in the British Museum, to a variety of the com- 

 mon European dah'Uata. 



Our Lalirador species agrees well with a specimen from the Fish River 

 Lakes in NorlJKM-n j\laine; and they seem to present indications of a climatal 

 varicl) (.l(he European form. We have compared a Labrador and a Maine 

 Spccinu'U \\i(h a .single flugli.sh s|H'ciuiru. 



