AMERICAN LEPIDOPTKRA. 239 



ample is an excellent one, much more obscure and powdery in ap 

 pearance, and looks as if it had been too long in the cyanide, caus- 

 ing the green to change toward that peculiar reddish tinge that it 

 often assumes. The Vancouver examples are both uniformly gray, 

 the s. t. space being scarcely lighter than the median, but with the 

 mossy green well developed. 



With a better series of both sexes I doubt not this species will be 

 found fully established. 

 ]flaine!«tra petita n. sp. 



Like olivaeea in maculation, with a mossy overlay which changes 

 to reddish in the female. This is obvious throughout the wing, but 

 more prominent in the basal and s. t. spaces. The latter is gray, 

 contrasting in both sexes, more or less marked, however, by the 

 greenish or reddish tinging. The terminal space is only a little or 

 not at all darker. Reniform tends to become kidney shaped, and is 

 mossy or reddish filled. The orbicular is round, proportionate and 

 paler than usual in olivaeea. T. a. line rather evenly outcurved, 

 geminate, the inner line faint and really indicated only by the con- 

 trast between the paler filling and the basal ground color. T. p. 

 line evenly bisinuate, inner line black, outer punctiform and frag- 

 mentary. There is a rather obscure dusky median shade. Clavi- 

 form rather large, black ringed, pointed 



Habitat, size and genital structure as already noted. Taken alto- 

 gether this is a brighter, more contrasting species than oliva,cea, but 

 not so striking as eomis. The net result of the studies here made 

 is shown in the following list: 

 Ittaiuestra olivaeea Morr. 



Eastern United States to Florida ; Canada ; west to the Missis- 

 sippi River and beyond to the elevated plains. 



vnr. obscurior Sms 

 Maine : a very heavily powdered form. 



;?Iaine«tra lueina Smith. 



A o-eographical race occupying that part of British America ex- 

 tending from AVinnipeg northward and westward to the Rocky 

 Mountains. Probably extends east and south of this into the 

 United States, and should occur in the Yellowstone region. 



mauiestra altua Smith. 



A o-eovj-raphical race occupying the elvevated plateau approaching 

 the Rocky Mountains and extending southward along this chain 

 into New Mexico. 



TRANS. AM. ENT. SOC, XXVII. JUNE, 1901. 



