VI. An Illustration of North Annerican Agrotis and 



Oncocnemis 



BY LEON F. HARVEY, A. M., M. D. 



[Read before tins Society, Dec. 3, 1875.) 



The photographic plate (III) which accompanies this paper is 

 prepared from specimens belonging to the collection of this Society. 

 The species are interesting either because they seem to me new to 

 science, or as being closely allied, and perhaps not yet clearly dis- 

 tinguished. The genus Agrotis is defined by Lederer as having 

 always the middle and hind tibiae spinose and the dorsal region of 

 the body free from tufts. The thoracic vestiture forms a mesial 

 crest in the subgenus Ammoconia, in which the females show a ter- 

 minal lateral abdominal impression noticable in Agrotis aratrix a 

 new Texan, and the second American species of the group. In 

 his recently published check list (Buffalo, November, 1875), Mr. 

 Grote has referred to Agrotis the subgenera Anicla, Matuta, Pach- 

 nobia and Envois. 



In addition Ammoconia Led. sliould be thus recorded, and I would 

 propose also to distinguish under the Hubnerian designation Ogygia 

 the European ^.r«v<VZa and the ^>?ienc«« species having a flattened 

 abdomen, and a casual resemblance to Pyrojihila, such as clandes- 

 tina. 



Agrotis opaca Harvey, Plate 3, fig. 1. 



A beautiful little ppecies allied to atinexa. Fore wings from the base, over 

 costal region to t. p. line, light brown. Stigmata small, light brown; orbicular 

 elongate, with central dot. Claviform outlined, black. The wings are else shaded 

 with blackish. Subterminal line a series of very distinct, bright, pale marks. 

 Cell between'and beyond the stigmata deep black. Hind wings partly trans- 

 parent with smoky borders and without discal mark. Collar with a black line; 

 head and prothorax blackish; thorax brownish; legs and breast blackish ; tarsi 

 dotted. Distinguished by the small size and bright marks of the subterminal 

 line. 



Expanse, 28 ni. m. Bosque Co., Texas, March 3. Mr. Belfrage 

 (No. 540, violet label). 



