REVISION OF SPECIES OF THE GENUS AUliOi'lS. 71 



Peridroma riidens Tlarv. 

 1.S74. Harvey, Uiill. liiilV. Soc. N. Sc, ii, 'J71, Jgrolis. 



Creamy gray, soinewliat darker at base, and more or less irrorate 

 with black scales. Transverse lines obsolete. Ordinary spots small, 

 neatly cut, coiicoloroiis or centered, with few dark scales. A distinct 

 black basal dash, and a broad dash connecting the ordinary spots, also 

 black. A brownish subapical costal spot, followed l»y a paler apical 

 spot. Se(;ondaries i)early white with a narrow, dark terminal line. 

 Beneath, pearly white ; primaries ])owdered with black, as is the anterior 

 nuirgin of secondaries. Head and i iiferior half of collar creamy yellow. 

 Thorax and collar dark, somewhat purplish gray. 



l<jxi)ands .'Jl-.');}""" ; 1,25-1..'513 inches. 



Uauitat. — Texas. Apparently a common species in Texas, and very 

 readily recognized by the pale colors and the neat, contrasting black 

 maculation. 



Agrotis pellucidalis Grt. 



1880. (irf. r.iill. Gt'ol. Snrv., VI, 507, Agrolis. 



rudttiH I Ilarv. 

 1875. Ilarvoy, P.iill. P.iilV. Soc. N. Sc, in, 5, Agrotis. 



Very like riidcns in color and general maculation, but lacking entirely 

 the black basal dasli an<l the conmn-ting line between the onlinary 

 .spots. The geminate transverse lines are traceable, the t. ]). usually 

 ])unctilbrm, and the claviform spot is faintly outlined. In other re- 

 spects there is no percej^tible diiference from rudens. 



Expanse and locality as in nidcn.s, and it seems equally comuion. 



(J roup INCIVIS. 



All the tibiae spinose; anterior moderate in length, not broadening 

 toward the tip; spines long, slender, straight, and weak. Front 

 broad, full, slightly narrowing interiorly, not roughened or tuberculate. 

 Eyes large. Antenna'. simi)le in both sexes ; ciliate in the S . Thoracic 

 vestitnre smooth, appressed; in perfect specimens showing a small 

 divided basal tuft, most evident in ineivis. The i)rimaries are rather 

 small, smoothly scaled, with a more or less evident satiny lustre, the 

 apex alwaj'S distinct. 



The harpes of the $ are long, rather narrow, the tips slightly en- 

 larged, somewhat concave, the apex oblique or rounded, inwardly 

 fringed with a row of acute spines. The clasper is simple, moderate in 

 length and but slightly curved. 



The species are few in number and easily separated. All are pale in 

 color. Tiicivis is largest, the color carneous gray, the ordinary spots 

 distinct, brown, and of good size; the s. t. line is distinct, but the others 

 are either obsolete, or indicated by black venular points. The other 

 species are more whitish, the transverse maculation entirely wanting, 



