TEIPH^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 

 very 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. K^at. Sci. iii. p. 80 (1876); Smith, 



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

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



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

 grey-brown, the sides and anal tuft rufous. Fore 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 bj 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 suffusion 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. Caxada, Br. Columbia, Yancouver, 1 5 type; U.S.A., 

 "Washington Terr., California. Exj). 40 millim. The head and 

 tegulse of type wanting. 



108G. Triphaena exsertistigma. (Plate LXXVII. fig. 1.) 



Agrotis exsertistigma, Morr. Proc. Bost. Soe. N. H. xvii. p. 166 (1874) ; 



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

 Agrotis ohservahitis, Grote, Can. Ent. vii. p. 144 (1875). 



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

 extremity of 2nd and 3rd joints ; tegulae 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 strigae from costa and median nervure with a blackish 

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

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

 excurved above inner margin ; claviform elongate, outlined with 



