REVISION OF SrKflKS OF THE GENUS AGROTIS, 147 



Tetrica is much more evenly colored, gray over a Iiiteous base ; all the 

 lines evident, but none distinct. 



As a whole, the species in this groni) are decidedly variable, and 

 while with care there should be no serious dilliculty in reco^nizin*^' the 

 species, yet hasty or ill-considered comparison is nowhere more likely 

 to blunder than here. I have endeavored to give the s[)ecilic i)eculiarity 

 of each species, but it must be recollecte<l that probably some of the 

 forms vary more than even the large material at my command indicated. 

 Single specimens should always be very cautiously determined where 

 they are at all olf type. 



Ill a more condensed form the scheme appears in the following table: 



SYNOPSIS OF SPECIES. 



Collar with a black transverse lino or shade. 

 Ordinary spots not conlluent. 

 No louj^itudinal lino at base. 



Priuiarifs hitcous, niaculation indistinct iucollahis. 



Primaries gray, costal si>ace darker, mottled with line transverse striga, 



BKOCIIA. 



Primaries evenly dark f;ray, wider ; niaenlatiou faint sponsa. 



A distinct longitudinal black line. 



liUtcons gray, transverse lines obvious COGITaxs. 



Ordinary spots conlluent, primaries strigate. 



Secondaries dusky, primaries dusky, strigate with white iiollk:\iani. 



Secondaries white, with a broad soiled outer margin ; primaries dusky, a pale 

 apical shade, and a similar pale shade below cell to near outer mar- 

 gin ATKISTKIGATA. 



Secondaries white, primaries gray, strigate with white biclavis. 



Collar concolorous, without transverse black line or shade. 

 Primaries dull dark gray to black, secondaries dusky. 

 Primaries purplish black, ordinary spots incompletely outlined in deep velvety 



black PEHPDLiTA. 



Primaries deep dark gray, transverse lines distinct, single, t. p. crenulate; ordi- 

 nary spots indetinite FU>fAi.is. 



More fuscous, niaculation all subolisolete PElU'USCA. 



Blackish, lines obsolete, ordinary spots neatly deliiRd Ijy yelluwisli scales, 



PASTORALIS. 



Somewhat paler, all niaculation evident, a purplish shade through basal and 



8. t. space FINIS. 



Primaries black, secondaries white, niaculation obsolete, ordinary spots neatly 



outlined \klli:i{ipenni.s. 



Primaries more smoky, secondaries white, ordinary spots not distinctly outlined, 



transverse niaculation obvious atomauis. 



Primaries fuscous to brown, apices jiroduced, secondaries dusky. 



Larger, wider winged, all maculatiou traceable tkxana. 



Smaller, narrower winged, trausverseliues wanting, ordinary spots dusky, 



(JAGATES. 



Primaries varying from ash to j'ellow gray. 

 Secondaries white. 



Primaries bright yellow, terminal space darker, ordinary spots obsolete, 



CITKICOLOR. 



Primaries even, luteous ; spots complete mistthata. 



Secondaries pearly white iridescent. 



