WILLOW LEAF-MINERS. 581 



with roseate in the white markings, I can perceive no tendency in the 

 eight specimens of this imago, that Mr. Walsh has so iiberally sent me, 

 to merge into the ornamentation of salicifungiella. Certainly the char- 

 acter of the markings is the same in each, and it is possible that we have 

 here but a single species. The imago occurs August 3-13. Bred by 

 Mr. B. D. Walsh." 



Moih.—Yove wings red, irregularly marked with whitish. Near the base is a 

 whitish band, powdered with dark fuscous, which curves across the fold, including 

 the inner margin, and reaches the middle of the wing; the part beneath the fold is 

 tinged with reddish and sometimes with pale brownish. Adjoining this band exteri- 

 orily is a dark brownish-red, curved band, which does not cross the fold. On the 

 costa are three small white spots, one near the tip, one about the middle and one ex- 

 terior to the brownish-red band. The margin of the wing is powdered with dark 

 fuscous cilia red. Hind wings dark gray ; cilia grayish-fuscous. 



Head reddish. Antennae black, annulated with white. Labial palpi pale red; 

 second joint with two blackish rings ; terminal joint with three black rings and a 

 black dot at the base, extreme tip black. (Clemens.) 



58. Gelechia, undescribed species (Chambers). 



Imago unknown. The larva sews together willow leaves at great 

 elevations in the Rocky Mountains. 



59. Marmara salictella Clem.* 



The following account of this moth is copied from Clemens's posthu- 

 mous work on the Tineina: 

 The larva mines the young branches of the yellow willow tree. I 



* It leaves its mine at maturity to weave a white semi-transparent cocoon within 

 some crevice of the bark of the tree on which it feeds or upon the ground. The ex- 

 terior of the cocoon is covered with little froth-like globules, which resemble minute 

 pearls. 



The imago rests with the front part of the body elevated, and, I believe, the fore- 

 feet applied to the breast, like the members of the genus Tischeria. The antennte 

 are held extended at the side of the head, and have a constant trembling motion. 



Larva. — The larva is much flattened, and the segments separated by deep incis- 

 ions, particularly on the sides. The head is extreuiely thin, circular, with a peculiar 

 appendage in front of the mandibles similar to that found in the larva of LithocoUetis 

 of the second group, which it likewise resembles in form. Like these it has three 

 feet and three abdominal prologs and one terminal pair, all very short. 



Moth. — Hind wings setiform. The subcostal vein is faint, attenuated, and simple. 

 The discal vein free, central and two-branched. The median vein simple. Fore- 

 wings narrowly lanceolate. The disk long, narrow, and closed. The subcostal vein 

 is well defined from the base to the first marginal branch, which appears to be a con- 

 tinuation of it. But from the origin of the first marginal brauch the vein is greatly 

 attenuated, and is deflected towards the middle of the wing and subdivides into two 

 branches opposite the point at which the first marginal branch attains the costa. 

 The two branches into which the subcostal divides are delivered one to the costa 

 just behind the tip and the other midway between this and the costal end of the first 

 marginal branch. The median vein is two-branched, and is well defined from the 

 base to its branches, all of which are attenuated. The posterior branch is short, 



