96 ENTOMOLOGICAL SOCIETY 



Family ELACHISTID^E. 



Mompha pecosella, n. sp. 



Antennae dark fuscous, with narrow black annulations. Labial palpi 

 white; second joint thickly sprinkled with black scales, especially on 

 the exterior side; terminal joint with two black annulations, one near 

 base, the other just before apex. Face iridescent, white. Head white, 

 sprinkled with dark fuscous scales. Thorax dark fuscous. Fore wings 

 blackish brown, irregularly and sparsely sprinkled with white scales 

 and indistinctly streaked with lighter brown longitudinal lines. From 

 costal base runs an outwardly oblique ridge of raised scales across the 

 wing; the basal portion of the wing, limited by this ridge, is strongly 

 mottled with white scales; just before the middle of the costa begins 

 another oblique ridge of raised scales, parallel with the first, but not 

 so complete, consisting of small separate tufts, of which the largest 

 is on the fold. Below the end of the cell is a large tuft of raised scales, 

 surrounded by scattered white scales. Hind wings dark fuscous. Ab 

 domen fuscous above, ochreous on the under side. Legs blackish, 

 sprinkled with ochreous. 



Alar expanse, 12-13 mm. 



Pecos, New Mexico, June (T. D. A. Cockerell). 



Type. No. 9901, U. S. National Museum. 



This species is quite close to Mompha murtfeldtella Cham 

 bers, but it is smaller and the basal part of the fore wings is 

 mottled, not pure white as in murtfeldtella; the light colored 

 thorax also distinguishes that species from the present. With 

 wings folded this insect looks like a Recurvaria. 



Mompha iridella, n. sp. 



Antennae dark brown, with indistinct silvery white annulations. 

 Labial palpi white, terminal joint shaded in front and at apex with 

 golden fuscous. Head and face white. Thorax fuscous, iridescent. 

 Fore wings light golden brown, overlaid with iridescent white and blue 

 scales. A triangular spot near base of costa, another on the middle 

 of costa, and a third larger costal spot between the latter and apex 

 silvery white; the two last costal spots are edged exteriorly with 

 blackish scales. Between the fold and the dorsal edge are two or 

 three small tufts of erect iridescent scales; similar small tufts are 

 found on the middle of the wing and one at the end of the cell; just 

 below the latter is a larger dark brown iridescent scale tuft. Tip of 

 apical cilia white, cilia otherwise light yellowish fuscous. Hind wings 

 dark bronzy fuscous, cilia a shade lighter. Abdomen bronzy fuscous. 

 Legs whitish, barred exteriorly with fuscous. 



Alar expanse, 13-14 mm. 



