Notes on North American Lepidoptera. 95 



it is attached the long blackish claviform; orbicular spot round, whit- 

 ish and contrasting; the reniform whitish, upright, elliptical and closely 

 approaching the exterior line ; the latter is black, distinct, non-dentate 

 and but slightly bent beneath the cell ; beyond, the ground color becomes 

 lighter; the subterminal line is irregular, preceded by cuneiform mark- 

 ings and by a blackish costal shade ; the fringe concolorous. The poste- 

 rior wings are dark fuscous with white fringes and faint discal dots. 



Beneath whitish, without markings, except faint discal dots and suf- 

 fused gray costal shades. 



Habitat. Mountains of Colorado, above 12,000 feet, July 

 22 to Aug. 12. 



One specimen in the possession of Dr. A. S. Packard, 

 Jr., and another in our own collection. 



This abnormal species is extremely interesting on account 

 of its resemblance to the boreal genus Anarta, three species 

 of which are found in the same localities. Messrs. Bates 

 and Wallace have discovered numerous cases of mimicry 

 between the species of Ileliconidce and Pieridce inhabiting 

 the tropical regions of South America ; and now we have in 

 the alpine fauua of these mountains a parallel instance of 

 close outward resemblance between species of two widely 

 differing genera of moths. 



None of the northern Agrotids known to us, as scropulana, 

 opipara, hyperborea, islandica, okakensis, approach in the 

 least to Anarta. 



Adit a chionanthi, Sra. Abb. 



We have received from our friend Mr. George Frazer, a 

 female specimen of this rare and interesting species ; which 

 has remained unknown since 1797. The antennas of the fe- 

 male are simple with fine hairy clothing, and the ovipositor 

 projects slightly beyond the abdomen. 



In his generic description Mr. Grote states that the tibiae 

 are spinose ; this is apparently an error as the only spines 

 present are the pair before the spurs on the middle tibiae 

 and a single spine (there possibly may have been two) be- 



