NO. 1203. .. NEW NOCTUID MOTHS— SMITH. 415 



Jienrici may have to be reinstated for the eastern form usually named 

 albovenosa. It seems that there is a small, though constant, difference 

 in the male sexual parts, which is not accompanied by any noticeable 

 superficial differences and seems not to be accompanied by any larval 

 differences obvious to Dr. Dyar. 



2. CHYTONIX SEMIFASCIA, new species. 



Ground color a somewhat smoky brown, variously powdered. Head 

 without obvious markings, collar with a black tip, disk of the thorax 

 pure white, in strong contrast with the rest of the markings. Edge of 

 the patagia blackish; the scales of the posterior tuft brown tipped. 

 Primaries with the upper half of the wings smoky brown, the lower 

 half blackish brown, the shades merging gradually. The markings are 

 all obscure and are traceable with difficulty. The basal line is marked 

 on the costa only and never distinctly. The transverse anterior line is 

 geminate, but the outer line only is obvious. In course it is usually 

 oblique, with the usual outcurve below the median vein. Transverse 

 posterior line geminate, both parts of it almost equally indistinct, the 

 inner perhaps a little the better marked. The defining lines are very 

 even, but the line as a whole is almost rectangularly bent over the cell 

 and then incurved below. The subterminal line is scarcely marked 

 above the middle except by a blackish dash near the apex. Below the 

 middle it is traceable as a gray or whitish shading through the dusky 

 part of the wing. There is a smoky terminal line, beyond which there 

 is a pale line at the base of the fringes, which are interlined with black- 

 ish and cut with brown on the veins. The ordinary spots are vaguely 

 indicated, outlined by very slightly darker brown shadings. There is 

 a distinct black basal dash, which reaches the transverse anterior line, 

 and beyond it is the small, loop-like claviform, which is defined in a 

 pure white patch which fills the median space between the median 

 lines and extends upward to the median vein. Through this white 

 patch some specimens show the remnant of a median shade. Beyond 

 the transverse posterior line a blackish shade forms the continuation 

 of the basal line and reaches the subterminal line. Above this there 

 is a little black sagittate mark. Toward the apex there is a brown 

 shading which is broad on the margin and narrows toward the subter- 

 minal line. Secondaries yellowish white, a little silky in appearance, 

 with a blackish line at the base of the fringes as well as a vague small 

 discal lunule. Beneath powdery, yellowish white, both wings with a 

 discal lunule. 



Expanse, 25 to 29 mm. = 1 to 1.15 inches. 



Habitat. — Glen wood Springs, Colorado, in July; Garfield County, 

 Colorado, 6,000 feet. 



Type.—Cskt. ^o. 4147, U.S.N.M. 



This pretty little species has been taken by Mr. Bruce and also by 

 Dr. Barnes; both sexes being before me. It is a sharply marked form, 



