16 Messrs, A. G. Butler and W. F. Kirby on 
32. Deilinia variolaria. 
Cabera variolaria, Guenée, 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, Guenée, Phal. ii. p. 92. n. 1067. 
2? Rapids of the Drowned, 4th July, at 11.30 p.m. 
I believe this to be the female of 7. 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. 
Phalena 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 7. brunneata, I abstain from 
separating it without abundant material to prove its dis- 
tinctness. 
36. Thamnonoma gracilior, sp. n. 
Allied to Z. 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 defined blackish lunule on the discocellulars ; 
postmedian line blackish, sinucus, 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 
