16 Messrs. A. G. Butler and W. F. Kirby on 



32. Deilinia variolaria. 

 Cabera variolaria, Guen^e, Phal. ii. p. 56. n. 987. 

 Fort Good Hope, Mackenzie River, 18th July. 



33. Physostegania lineata. 

 Physostegania lineata, Warren in litt. 



Rapids of the Drowned, 4th July at 11.30 P.M. 



This being a common Californian species, it is hardly 

 probable that it can have been overlooked by American 

 describers, and therefore I give the name for what it is worth 

 without diagnosis. The single example obtained is much 

 worn, but quite recognizable. 



34. Thamnonoma marcescaria. 

 Halia marcescaria, Guenee, Phal. ii. p. 92. n. 1067. 



$ ? Rapids of the Drowned, 4th July, at 11.30 P.M. 

 I believe this to be the female of T. marcescaria^ but as we 

 only possess one male of the species, it is difficult to decide 

 the point. The two insects differ in slight details of pattern, 

 which are probably of not more than sexual significance. 



35. Thamnonoma brunneata. 

 Phalcena brunneata, Thunberg, Diss. Ent. i. p. 9 (1784). 



Fort Good Hope, Mackenzie River, 18th July. 



I feel very doubtful respecting the identity of the uniformly 

 coloured American species with the sharply lined European 

 species; but, seeing that Dr. Packard, in his Monograph, 

 calls the New- World form T. brunneata } I abstain from 

 separating it without abundant material to prove its dis- 

 tinctness. 



36. Thamnonoma gracilior^ sp. n. 



Allied to T. brunneata, but smaller and more slender ; 

 ferruginous; the basal area, especially of the secondaries, 

 irrorated with blackish grey up to the median shade ; the 

 latter narrow, dusky, dentate-sinuate on the primaries and 

 arched on the secondaries, where it is impinged upon by a 

 more or less denned blackish lunule on the discocellulars ; 

 postmedian line blackish, sinuous, almost bracket-shaped on 

 the primaries, limiting the external area, which is densely 

 irrorated with blackish grey (leaving the outer borders clear 

 in the female) ; the secondaries of the male are moreover 

 more or less densely irrorated throughout ; marginal line 



