186 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxv. 



differ very greatly from that along the inner margin; l)ut on the other 

 hand there is a shading above the vein, continuous with the trigonate 

 shading above vein 4. In only one example is a discal dot observa- 

 ble. Secondaries white at base with a smoky tinge outwardly. 

 Beneath whitish, with a distinct yellow tinge over the costal region. 



Expanse. — 1.20 inches (30 mm.). 



Habitat. — Cartwright, Manitoba (Heath). 



Two males and two females only, all very much alike and all more 

 or less imperfect. The material is scant to authorize a new species 

 in this group; but the combination of dark primaries, like those in 

 alhilinea with pale secondaries, leads to the belief that with more 

 material additional points of difference will be brought out. Mean- 

 while it is at least a well-marked local form. 



Tyjye.—^o. 6216, U.S.N.M. 



LEUCANIA DIFFUSA Walker. 



Leucania diffusa Walker, C. B., Mus., Het. IX, 1856, p. 94.— Deuce, Biol. Cent. 



Am., Het., I, 1889, p. 262, pi. xxvi, fig. 10. 

 Leucania alhilinea Grote, 111. Essay, 1882, p. 42.— Smith, Bull. 44,U. S. Nat. Mus., 



1893, p. 186. 

 Leucania moderata Walker, C. B., Mus., Het., IX, 1856, p. 114.— S.mith, Bull. 44, 



U.S.Nat. Mus., 1896, p. 186, pr. syn. 



Ground color a very pale luteous, tending to whitish. Head with a 

 more or less obvious rusty tinge. Pale portion of collar with a brown 

 or blackish transverse line, the tip rusty over a black line. Patagige 

 with a white line on disk and on the thorax a white line behind the 

 collar. Primaries as a whole have the region along the inner margin 

 broadly pale; in the male the costal region is usually as light; in the 

 female it is gray with a pinkish tinge. A loop-like claviform is more 

 or less completely indicated in ever}^ specimen, and is attached to a 

 narrow black basal streak. The white median vein is usually black 

 margined beneath, and below this is a gray or brown shading. A 

 black discal spot is present in all the specimens, and often there are 

 two. The terminal space is usually gray or brown, and the usual tri- 

 angular shading above vein 1 is well marked, though not so broad as 

 in alhilinea. The fringes are of the pale ground and usually have a 

 still paler line at base. Secondaries white, becoming smok}'^ at the 

 outer margin, varying in this particular. Beneath white, more or less 

 powdery; primaries with the costa broadly yellowish or creamy, the 

 disk tending to blackish. 



Expanse.— 1.15 to 1.38 inches (29 to 35 mm.). 



Habitat. — Nova Scotia (Walker); New Hampshire; Newton, Massa- 

 chusetts; Torrington, Connecticut; Newark, May 5, August 17, and 

 Montclair, New Jersey, August 1 (Kearfott); Anglesea, New Jersey, 

 A^ugust 21 (J. B. S.); Iowa City, Iowa, July 29 (Wickham); Mesilla 



