TPvIPH^NA. 



631 



Larva. Dyar, Proc. Ent. Soc. Wash, iv, p. 316 (1899). 



Head 3-3 millim., pale, reticulated with brown, the curved band 

 from the vertex distinct below and a brown patch in the clypeus ; line 

 upward from eye not more distinct than the other reticulations. 

 Body brown, the ground-colour pale brown, finely striate, mottled 

 with dark brown ; dorsal line pale, narrow, nearly broken in the 

 centres of the segments, edged with blackish brown in the incisures ; 

 subdorsal line more distinct, pale, narrow, extending over joints 3 

 to 12 ; oblique shades pale, but alternating anteriorly with somewhat 

 wedge-shaped black patches that rest on the subdorsal line ; sides 

 finely mottled, obscurely streaked, the substigmatal line broad but 

 verv faint, sharp-edged ; spiracles black-rimmed. A general 

 feeder.— H. G. D. 



1085. Triphaena costata. (Plate LXXVI. fig. 32.) 



Agrotis costata, Grote, Bull. Buff. Soc. Nat. Sci. iii. p. 80 (1876) ; Smith, 



Cat. Noct. N. Am. p. 55. 

 Agrotis bmominalis, Smith, Proc. U.S. Nat. Mus. x. p. 451 (1887). 



5 . Head and thorax rufous ; tegulse black at tips ; abdomen 

 grey-brown, the sides and anal tuft rufous. Pore wing bright 

 chestnut-brown ; the costal area whitish, tinged with rufous to the 

 postmedial line ; the orbicular and reniform white, with some 

 rufous and fuscous at centre and defined by black, the former open, 

 V-shaped, its inner arm produced to base as a sinuous black streak 

 below the pale costal area ; a rather faint waved antemedial line ; 

 a dentate postmedial line bent outwards below costa, excurved 

 to vein 4, then oblique ; the subterminal line only defined by 

 fuscous sufi'usion on terminal area from below apex to above 

 tornus. Hind wing reddish brown, the cilia whitish ; the underside 

 greyer, irrorated with brown ; a small discoidal spot and curved 

 postmedial line. 



Hah. Canada, Br. Columbia, Vancouver, 1 5 type; U.S.A., 

 Washington Terr., California. Exp. ■40 millim. The head and 

 tegulse of type wanting. 



1086. Triphsena exsertistigma. (Plate LXXYII. fig. 1.) 



Agrotis exsertistigma, Morr. Proc. Bost. Soc. N. H. svii. p. 166 (1874) ; 



Smith, Cat. Noct. N. Am. p. 55. 

 Agrotis observabilis, Grote, Can. Ent. \u. p. 144 (1875). 



Head black-brown mixed with grey ; palpi black, white at 

 extremity of 2nd and 3rd joints ; tegulee white, the extremities 

 black ; thorax purple-brown, a few of the scales tipped with white ; 

 legs black and grey. Fore wing dark grey suffused and irrorated 

 with purplish black ; the costal area pale to the postmedial line, 

 the base of inner area pale ; the subbasal line represented by 

 double black strig^ from costa and median nervure with a blackish 

 mark beyond it below the cell ; the antemedial line double, waved, 

 oblique, fiUed in with grey, interrupted below costa and strongly 

 excurved above inner margin ; claviform elongate, outlined with 



