2U6 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxv. 



Priniiiries without contrasts of any kind. Costa narrowly but dis- 

 tinctly white. Median vein white, not broadly or prominently so, in 

 some cases with a short white extension on the branches. There is a 

 vague darkening- through the middle of the wing, but not a real shade. 

 Transverse posterior line indicated by a more or less complete series of 

 venular black dots. It is not complete in any example before me; but 

 in no case is there any doubt of its presence in great part. A series 

 of minute black terminal dots. Secondaries whitish to smoky, even. 

 Beneath white, ranging from almost immaculate to densely powdered. 

 Primaries tending to a pinkish suffusion and sometimes to a black 

 disk. 



Expanse.— l.li) to 1.25 inches (^7.5 to 31 mm.). 



ffdbitat. — Glenwood Springs, Colorado, June, July, August, and 

 September. 



Five examples, all from Dr. William Barnes, and all save one in 

 good condition. There is very little variation, and except in the some- 

 what lighter or deeper tint of the primaries and a little difference in 

 the niunber of spots composing the transverse Posterior line the speci- 

 mens are the same. 



Type.—^o. 6252, U.S.N.M. 



NELEUCANIA BICOLORATA Grote. 



Heliophila hicoltmita (thote, Papilio, I, 1881, p. 154. 



Leucania himhn-ntfi Smith, Bull. 45, U. S. Nat. Mm., 1893, p. 185. 



"Male, eyes hairy; thorax untufted; tibia? unarmed. Fore wings 

 and thorax light straw color, immaculate, concolorous. Hind wings 

 and a))domen pale reddish. Beneath the wings are shaded with red- 

 dish, like secondaries above. There are no markings whatever.'' 



Fxpanse.— 1.12 to 1.25 inches (28 to 31 nun.). 



Habitat. — Colorado (Bruce); Glenwood Spring, Colorado, August 

 25 (Barnes); Merino Valley, New Mexico, June 2() (Wheeler Exp.); 

 (/hirit-ahua Mountains, Arizona, flune 26 (Hu])bard); Tucson, Arizona. 



Six specimens are at hand, all agreeing in a general way with the 

 above description, which is copied from Mr. Grote\s original charac- 

 terization. In most of them, however, the costa and median vein are 

 obviously whitish, and in three specimens a few minute black dots 

 indicate the transvei-se posterior line. 



NELEUCANIA CITRONELLA, new species. 



Ground color a dirty pale lemon yellow with a smoky tinge. Head 

 and collar darker, more decidedly smoky. Primaries with the costa 

 narrowly white, the median vein at least partly white marked. 

 Transverse postei'ior hne punctiform, complete in the specimens 

 before me. A black dot on internal vein indicates the location of the 

 transverse anterior line. A series of small black terminal dots. The 



