TKtPHiENA. 



623 



Sect. I. {Ahagrotls). Antenna} oi' male serrate and fasciculate. 



*107o. Triphaena erratica. 



Agrotis erratica, Smith, Trans. Am. Ent. Soc. xvii. p. 41 (1890) ; id. Cat. 

 Noet, N. Am. p. 60. 



S . Dull ashen grej- to brick-red ; palpi blackish at sides ; head 

 and thorax pencilled with brown, the tegulfe whitish at tips. 

 Fore wing irrorated with dark brown ; traces of a waved subbasal 

 line from costa to submedian fold ; an indistinct oblique slightly 

 sinuous antemedial line ; orbicular and renifovm pale rufous with 

 grey annuli, the former small, oblique, the latter with its lower end 



Fig. Ho. — Ti-iphmna erratica, S- t- 



tilled in with blackish ; the postmedial line bent outwards below 

 costa, incurved in discal fold and below vein 4, with a series of dark 

 points on the veins beyond it : subterminal line whitish, defined by 

 brown on inner side, slightly excurved at vein 7 and at middle ; 

 traces of a terminal series of points ; the inner margin and a fine 

 line at base of cilia luteous ; in the redder specimens the markings 

 are almost obsolete. Hind wing pale grey-brown ; the cilia ochrcous, 

 white at tips ; underside with dark discoidal point and ciirved 

 postmedial line. 



JIah. U.S.A., California, Sierra Nevada. Exp. 33 millim. 



Sect. II. ( Trlpluena). Antenna of male ciliated. 



A. Hind wing orange. 



a. Fore wing with black bar or spot on costal area 

 before subterminal line. 

 a^. Hind whig with hlack discoidal lunule. 



cr. Fore wing with white patch bejoud the 



reniform cfflorescem. 



Ir. Fore wing without white patch beyond the 



reniform se?nikerbida. 



1^. Hind wing without black discoidal lunule fimbria. 



h. Fore wing without black bar or spot on costal area 

 before subterminal line. 



a? . Tegula; white except at tips jantldna. 



?y\ Tegula; concolorous interjecta. 



B. Hind wing not orange. 



a. Head and teguhe dark red-brown, contrasting. 

 a}. Pectus and ventral surface of abdomen tinged 



with red-brown -. rufipcctus. 



h^. Pectus and ventral surface of abdomen not 



tinged with red-brown brunneicolUs. 



