REVISION OF SPECIES OF THE GENUS AGROTIS. 135 



Carneades cequalis Ilarv. 



1870. Ilarv., Can. Ent., viii, :M'>, Atjrotis. 



" 9 . Allied to Wihonii aiul especially resembling some of the varie- 

 ties of that species, but distinguishable by the s. t. line not being twice 

 more i»roininently indented, but pale, dentate throughout its length, 

 and by the concolorous terminal space and larger stigmata. Hoary 

 olivaceous fuscous with a tinge of brown ; claviform indicated ; orbicu- 

 lar large, irregularly elongate; reniform wide ; cell shaded with brown. 

 T. p. line geminate, regidarly lunulate. Fringes brown discolorous. 

 Hind wings fuscous, deepening in tint outwardly, with pale, faintly in- 

 terlined fringes and long, narrow discal streak ; l>eneath whitish, irro- 

 rate on costal region, with faint terminal shade and discal mark ; prima- 

 ries fuscous. Tliorax and head concolorous with fore-wings. 



'^ Exi)anse 38">"'. Calitbrnia." 



Apparently a good si)ecies allied to lacunosa. Entirely unknown to 

 me in niiture, I can not identify it with any of the numerous Califor- 

 nian species known to me. 



Group QUADRIDENTATA. 



This is characterized by strongly armed anterior tibia', prominent, 

 roughened, and somewhat tnberculate front, serrate and strongly 

 bristled male antenme and bifurcate clasper. The distinctive charac- 

 ter separating it from the other group with which it agrees in struct- 

 ure is found in the ornamentation. Peculiar to it is the maculation from 

 which the typical species has received its name; veins 3 and 4, ami to 

 a less extent veins G and 7, are marked with pale streaks, extending to 

 and strongly indenting the terminal space. In addition, the ordinary 

 spots are always distinct, thecosta usually perceptibly paler, the orbicu- 

 lar often oblong and open superiorly, the median vein more or less 

 marked with white, aud a more or less distinct submedian pale dash. 

 On the whole this group is rather closely allied to sHixjotlticd through 

 Jiavidens, and to vcncrabUis through brcvipennis. The other species 

 more evidently' resemble the other groups nearest allied in the structure 

 of the male genitalia. In this latter character the species agree toler- 

 ably well among themselves. Except in olivalin the lower fork is long- 

 est aud tolerably straight. In niveilinea, Jiavidens, and placjigera this 

 low«'r fork reaches to or exceeds the tip of the harpes, the tip somewhat 

 curved and not pointed. l\\ the other species the lower fork is stout, 

 straight, regularly tapering to an acute point, and does not reach the 

 tip of the harpes. Olivalis is unique in having the lower fork very 

 short and stout, rapidly tapering to an acute tip. The upper fork and 

 the harpes show little variation, the former being nearly eveidy and 

 equally curved, and the latter being oblon? and rounded or oblicjuely 

 truncate at tip. As a matter of fact the genitalia are not exactly alike 

 in any two species ; but the diflereuces are so slight aud so diflicult to 



