REVISION OF SPECIES OE THE GENUS AGliOTIS. 47 



To Mr. Moesclilor I owe a sj)cciiuen of t his specios, tiiul it is upon his 

 authority that I have iuchuled tlic si)ccies as Auiericau, It is per- 

 fectly distinct from any other American form. 



Platagrotis impeiita Iliibu. 



1823. Hiibn., Zutracge, 447, 448, Oijun'ta. 

 1880. (Jrt., Can. Ent., xii, 118, A<jroti>i. 



romjxirata Monsfhl. 

 18G-J. Mouschl., Wicii. Eat. xMoii., vi, l:Jl ; jil. 1, f. i>, J<jrutin. 



saxigeiia Morr. 

 1874. MoiT., Proc. liost. Soc, N, H., 17, 1G2, Agrotis. 



Dark, somewhat fuscous or reddish brown, more or less irrorate with 

 gray scales. Transverse lines darker, accompanied by gray shades. 

 T. a. line rather even, outwardly oblique; t. p. line as in trabcdis but 

 less distinct and much nearer the s. t. line. The hitter is dark, broad, 

 and irregular. S. t. space strongly irrorate with gray. Ordinary spots 

 large; orbicular gray, reniform discolorous reddish. Claviform small, 

 outlined in black. Secondaries smoky fuscous. Beneath as in the pre- 

 ceding species but much darker. Thorax concolorous with primaries, 

 collar tipped with white. 



Expands 37"""; 1.5 inches. 



Habitat. — Labrador and mountains of Northern and Eastern States. 



This is an easily recognized species, the characters of which have 

 been already fully given. It is not common. The generic term Ogjigia 

 may have to rei)hice riatagrotis if the type of 0<Jij<jia is impm-ita, of 

 which I am not sure. 



Genus EUERETAGROTIS Smith. 



Fore tibia unarmed. Head moderate, rather small, front subequal. 

 Antenn;e simple in 9 , slightly serrate, and finely ciliate in the S . 

 Thorax with a distinct divided crest, more prominent, and forming dis- 

 tinct a[)ical and basal tufts. Collar slightly produced at middle. Pri- 

 nuiries wide, costa distinctly arched, outer margin obliquely rounded. 

 The ordinary spots are normal. 



The genitalia of the S are after one general type. The harpes are 

 superiorly prolonged, terminating acutely; in sigmoidc.s, rather evenly 

 dilating backward and somewhat twisted; in perattenta the upper 

 margin is tolerably straight, the inferior margin very irregiUar. Both 

 forms are provided with a long corneous curved hook or clasper. 



In wing form and in the type of S genitalia this group is allied per- 

 haps most nearly to the badicoUis section. 



Three species are contained in it which are easily sej)arated. Sig- 

 moides and pcraticnta have the cell between the ordinary spots black ; 

 atfenta is without this peculiarity, and the transverse lines tend to be- 

 come obsolete. Of the first two, sijimoidcs is distinguished by its larger 

 size and the prominent discolorous tuCtings of ihorax. 



The species are all eastern, and rather northern, and arc not rare. 



