I 



REVISION OF Sl'lX'lES OF THE GENUS AGKOTIS 131 



Porosagrotis pluralis (irt. 



1878. Grt., Bull. Gtjol. Siirv., iv, 174, Aijrotis. 

 1680. Grt., liuli. Geol. Siirv., Vi, 144, Atjrotis. 

 1882. (irt.. III. Essay, 5.'), pi. 2, f. 1(1, Ayrotin. 



Gray, the middle portion ofpriiniiries sutiiised with yellow oclierous. 

 Trausverse Hues barely traceable, very slightly paler than the space 

 thn)u<;h which they pass. S. t. line distinct, pale, inwardly shaded 

 with fuscons, two evident teeth on veins 3 and 4. A slightly paler 

 ai)ical patch. All the veins more or less evidently marked with white, 

 veins 3 and 4 and G and 7 unusually distinctly so. The cell except or- 

 tlinary si)ots and a shade over veins U, 3, and 4, fuscous. Orbicular 

 pale, moderate in size, somewhat oblique. Keniform upright, constricted 

 at middle, and interiorly dilated ; annulate with white, the center dark 

 gray. Secondaries smoky, paler at base. Jieneath, powdery white; 

 disc of primaries more dusky. Ilead and thorax gray mixed with black- 

 ish, margins of patagiie yellowish butf. 



Expands 37"""; 1.5 inches. 



Habitat. — Nevada. 



The 9 type from Dr. Bailey's collection is the only specimen exam- 

 ined, and the place assigned to the species is therefore liable to be 

 erroneous. The general habitus of the species seems to place it here, 

 and 1 think that the $ when discovered will have pectinate antenuic. 



Genus CARNEADES Grt. 



Fore tibiie strongly spinose, with longer lateral spines at tip, which 

 is somewhat broadened. Front of head rough, tuberculate, with usually 

 a central depression. Palpi distinct, normally developed, reaching to 

 about middle of front. Antenn;e in the male with the joints marked 

 laterally with tufts of bristly hair; in the female simple with single 

 short ciliations, sometimes scarcely pubescent. Wings trigonate, apices 

 marked but not i)rominent, outer margin oblique, rarely rounded save 

 in thii qiuahidentata series. Hari)esofthe S oblong with obliijue tip 

 which is inwardly set with a series of spiuules. Clasper bifurcate, the 

 forks varying in proportion. 



The strong distinctive feature of the geuus is in the last character — 

 the forked clasper of the male genitalia. In all other characters it 

 agrees perfectly with that section of rorosagrotis of which muracnula is 

 the type. The series with this character constitutes by far the most 

 numerous group of the genus Afjrotis auct. The gieater proportion of 

 the species are western, and the greater part of the western Agrotid 

 fauna belongs to this genus. In structural characters and somewhat 

 Ml habitus the resemblance to the Ileliothina' is marked. It is a fact of 

 very great interest that this fauna of the far west should so preponder- 

 ate in species which have the heavy tibial armature aud modified frontal 

 structure. 



Jit'sides coutuiuiu^' ver^' mucU the gitJ^tyr wuwUev of sjiceies, iU^ 



