AGROTIS. 367 



b^. Fore wing with slight black streaks from outer edge 



of reniform iocionis. 



c^. Fore wing witliout black marks from outer edge of 

 reniform. 

 a-. Fore wing with the cell black between orbicular and 



reniforai .• geniculata, 



b"^. Fore wing with the cell not black between orbicular 

 reniform. 

 a^. Fore wing fuscous suffused with purplish grey ... plana. 



b^. Fore wing grey suffueed with purplisli i-ed mihcortieca. 



b. Tegulte without medial black line. 



a\ Fore wing with the ground-colour grey. 

 or'. Fore wing with the lines entire. 



aj^. Fore wing with the postmedial line dentate cissigma. 



b^. Fore wing with the postmedial line not dentate... violaris. 

 b'^. Fore wing with the Imes reduced to points on the 



veins dapsilis. 



b^. Fore wing with the ground-colour pale ochreous cmndenta, 



644. Agrotis opacifrons. (Plate LXYIII. fig. 26.) 



Agrotis opacifrons, Grote, Bull. Geol. Surv. iv. p. 170 (1878) ; Smith, Cat. 

 Noct. N. Am. p. 61. 



Head and thorax red-brown, the scales tipped with grej ; frons 

 deep black ; tibiae and tarsi blackish, the latter with pale rings ; 

 abdomen grey-brown, the anal tuft tinged with fulvous. Pore 

 wing grey, tinged with purplish brown and irrorated with black ; 

 a subbasal black striga from costa and point below the cell; an 

 antemedial striga from costa and points in and below cell, then with 

 traces of a waved line ; orbicular defined by black and open above, 

 either narrow U-shaped or semicircular ; reniform with its centre 

 and circumference slightly defined by fuscous ; a black streak above 

 median nervure from the antemedial line to the reniform ; post- 

 medial line rather indistinct, strongly bent outwards below costa, 

 then strongly dentate and incurved between veins 3 and 1 ; traces 

 of an irregularly waved subterminal line ; some black points on 

 termen. Hind wing pale, strongly irrorated and suffused with 

 fuscous, especially on terminal area ; cilia whitish ; the underside 

 with diseoidal luiiule and curved postmedial line. 

 • Hah. U.S.A., New York, 1 J, 1 $ , type. Exp. 42 millim. 



645. Agrotis spina. (Plate LXVIII. fig. 27.) 



Agrotis spina, Guen. Noct. i. p. 269 (1852). 



Mamestra nitida, Wlk. xxxii. 668 (1865). 



Mamestra fenehrosa, Wlk. sxxii. 66"J (1865). 



Agrods vast a/or, Scott, Trans. Ent. Soc. jS.S.W. ii. p. 40 (1869). 



cJ . Head and thorax reddish brown mixed with white ; tegulce 

 fuscous in front and with black medial line ; pectus and legs largely 

 mixed with white ; abdomen grey-brown, the ventral surface 

 strongly irrorated with white. Pore wing grey-brown, irrorated 

 with fuscous and suffused with rufous towards costa : a double, 

 waved, subbasal line from costa to submedial fold ; a double, waved, 

 antemedial line more strongly angled outwards above inner margin ; 



