846 JOHN B. SMITH. 



Cibalis is larger and darker, the reniform dark filled. 

 Gracillima is small, paler, the reniform scarcely traceable — i.e., 

 incompletely defined. 



O. cibalis Grote, Can. Ent. 1880, xii, 244. 



Head, thorax and primaries ash-gray, primaries with somewhat luteous shad- 

 ings. Median lines marked on costa only; a longitudinal black basal line reach- 

 ing into the long, narrow claviform which is narrowly outlined with black scales 

 and somewhat paler. Orbicular narrow, elongate, connected with the moderate 

 upright reniform, which is similarly pale ringed and is darker than the ground 

 color; a dusky shade on costa over the reniform. S. t. line pale, oblique and 

 somewhat irregular, preceded by a very even distinct brown shade. Through 

 the s. t. space the luteous shade is most distinctly visible between the veins ; an 

 even, continuous black, terminal line. Fringes concolorous, a pale line at base. 

 Secondaries whitish, somewhat iridescent, with distinct discal lunule and an in- 

 definite outer smoky border. Beneath primaries smoky, darker on disc and with 

 a distinct discal lunule. Secondaries whitish, powdery, with a narrow discal 

 lunule. Collar with a broad brown basal and terminal line, the central space 

 with a yellowish tinge. Expands 1.37 inches; 34 mm. 



Hab. — Colorado. 



Tliis species is readily distinguished by the distinct brown s. t, 

 shade in combination with the fused ordinary spots, obsolete trans- 

 verse lines, and larger size ; the only other species similarly marked 

 being very much smaller. 



I have not been able to examine the % genitalia very closely; 

 the harpes are very much as in chandleri ; the clasper I have been 

 unable to make out. This species appears rare, very few specimens 

 being known in collections. 



«. gracillima Grt., Can. Ent. 1881, xiii, 231. 



Head, thorax and collar pale, whitish gray. Primaries with the median lines 

 obsolete, barely marked on costa. Claviform elongate narrow, reaching from 

 base to the s. t. shade, narrowly black margined. Orbicular narrow, elongate, 

 fused with the small, upright and indefinite reniform. The two spots narrowly 

 black ringed. S. t. line pale, irregular, preceded by an obvious brown shade, 

 broken by black cuneiform spots about the middle; a paler shade precedes this 

 s. t. shade superiorlv- In the terminal space the s. t. line is followed by small, 

 frregular dusky spots; a narrow and very even black line through the terminal 

 space, beyond which the wing is more fuscous gray to the white line at base of 

 fringes. Secondaries subpellucid with faint traces of a mesial band and a nar- 

 row line at base of fringes from which a smoky shade extends irregularly and 

 indefinitely inward. Beneath, primaries smoky, secondaries white with a broken 

 outer line and a dusky terminal line. Collar with a narrow basal and terminal 

 line. Expands .75 inch. ; 19 mm. 



Hab. — Arizona. 



