1866.] 37 [Packard. 



curved opposite the renlform dot, going from the outer third of the 

 costa around to the inner third of the hind margin. Beyond 

 is a parallel line of dark strealis of uniform length and width, situated 

 either upon, or between the nervules. Beyond is a submarginal line 

 diffusely shaded inwards, and forming a diffuse triangular dusky spot 

 on the costa, below which is an angular sinus ; on the submedian fold 

 it is bent inwards ; a marginal dark line, scarcely interrupted by the 

 nervules. Fringe long, concolorous with the rest of the wing. Hind 

 wings a little more dusky than the anterior pair, pale on the costa; 

 edge dark ; fringe pale tawny, concolorous with the costa. Legs 

 darker than the body. Beneath dusky, with a diffuse dusky discal 

 spot, and two parallel dusky lines ; beyond, a broad, paler margin. 

 On the hind wings is a lunate discal dot, and an outer diffuse, ob- 

 scure, shaded patch on the costa. 



Length of body .62 ; fore wing .60 inch. 



Differs in its wings being of an uniform tawny color, with a plain 

 ringlet, and large reniform dot, with the rows of dots beyond ; by the 

 submarginal diffuse line, and well pectinated antennae. 



Caribou Island, found in abundance with Leucania rxifostrigaia ris- 

 ing, when disturbed, from the beach grass. July 24. 



Agrotis umbratus n. sp. 



3 . Of a peculiar uniform ashen umber-brown, with a slight oliva- 

 ceous hue. Head and thorax concolorous with the fore wings, head 

 a shade darker. Antennas concolorous, well ciliated as usuaL Fore 

 wings uniformly ashen-umber, with an indistinct black line on the in- 

 ner third, which is straight on the costa, but angular just below the 

 median nervure, and there is a very acute long angle on the inner 

 edge. A lunate discal black dot, shaded diffusely within with black ; 

 an outer curved, very acutely zigzag black line, the teeth very long, 

 acute and narrow, curving around, and ending on the costa ; above 

 and opposite to the discal dot, the line is very slender and consists 

 simply of dots and points, rather than a continuous line. A slight, 

 obscure, submarginal line. Fringe scarcely lighter than the wing. 

 Hind wings pale, nearly concolorous with the abdomen, without lines, 

 discal dot also obsolete. Legs ringed with paler bands. 



Beneath uniform cinereous, with a dusky outer diffuse line, which 

 is much curved ; on the hind wings obsolete on the inner margin. 

 No discal dot on the fore wings, very obscurely marked on the hind 

 wings. 



Length of the body .65 ; fore wings .70 inch. 



This fine species is characterized by the want of definite markings. 

 There is no discal dot on the hind wings above, or on the fore wings 

 below. It may be known by the very acutely zigzag line consisting 



