ipimokpha. 149 



Larva. Meyr. Brit. Lep p. 118; Barrett, Lep. Brit. v. p. 330, pi. 226. f. 1. 



Pale green ; broad dorsal, slender subdorsal and waved spiracular 

 whitish lines; bead yellow-green or black-brown. Food-plants: 

 Salix, Poplar, Birch, between leaves spun together. 5-6. 



Sect. II. Fore wing with the termen nearly straight from apex to vein 3, then 

 oblique. 



A. Hind wing of male with vein 2 arising from towards base of 

 cell and with semihyaline streaks above and below it. 



a. Fore wing with the postmedial line hardly bent inwards 



to costa, the clavil'orin and orbicular largo pleonectusa, 



b. Fore wing with the postmedial line strongly curved 



inwards to costa. 

 a 1 . Fore wing grey-brown ; hind wing suffused with 



brown, the clavifonn and orbicular small subvexa. 



b 1 . Fore wing ochreous white ; hind wing slightly tinged 



with brown, the orbicular large nanainw. 



4492. Ipimorplia pleonectusa. 



Lpimorpha pleonectusa, Grote, Bull. Buff. Soe. Nat. Sci. i. p. 101 (1873)' 



Smith, Cat. Noct. N. Am. p. 212. 

 Calymnia aquilinea, Smith, Bull. Brooklyn Ent. Soc. v. p. 07 (1882). 



Head and thorax red-browu tinged with greyish ; pectus whitish ; 

 abdomen yellowish white dorsally tinged with red-brown. Fore 

 wing yellowish suffused with red-brown, the costal edges pale 

 yellow ; subbasal line yellowish, from costa to submedian fold ; 



Fig. 44. — lpimorpha pleonectusa, $. \. 



antemedial line pale yellow, very oblique, straight ; clavifonn large, 

 red-brown defined by pale yellow ; orbicular and reniforrn large, 

 red-brown defined by pale yellow, the former elliptical, the latter 

 constricted at middle and slightly angled inwards on median 

 nervure ; a diffused red-brown shade from lower angle of cell to 

 inner margin ; postmedial line pale yellow, almost straight ; sub- 

 terminal line indistinct, yelloAvish white defined on inner side by a 

 slight red-brown shade, excurved below costa and at middle and 

 ending at tornus ; a terminal series of faint red-brown lunules ; 

 cilia with a slight vellowish line at base. Hind wing pale yellowish 

 suffused with reddish brown ; cilia yellowish white ; the underside 



