VOL. 117 



646 PROCEEDINGS OF THE NATIONAL MUSEUM 



Remarks: The deep, acute indentation of the inner margin of the 

 subtermmal band at vein 2 and lack of a conspicuous discocellular 

 patch on the forewing will distinguish cochisensis from the other species 

 of the genus with a round frons; the rather short, conelike median 

 projection of the ventral margin of the ostium is diagnostic for the 

 female genitalia of cochisensis. 



Males unknown but when available, there should be no difficulty in 

 association of the sexes. 



Haimbachia diminutalis, new species 



Figures 16, 20 

 Alar expanse: Male 10-12 mm.; female, 15-16 mm. 

 Frons round. Head and thorax white; palpi whitish, with some 

 intermixture of pale brownish fuscous. Forewing: Upper surface 

 white with a slight ochreous tinge, irrorated with buff. Medial line 

 buff, weakly defined, with origin from middle of costa, oblique outward 

 to stalk of veins 8 and 9, loop enclosing cell broadly concave, extending 

 well beyond end of the cell, thence strongly oblique and slightly 

 smuate to inner margin of the wing, terminating near middle. Sub- 

 terminal band with central area whitish, origin from costa about one- 

 fourth length of costa before apex; inner margin of band oblique out- 

 ward to vein 6, broadly curved to vein 2, thence zigzag to inner margin 

 of the wing; outer margin of band parallel to inner margin or nearly so. 

 Terminal line blackish, continuous or weakly interrupted. Fringe 

 nonmetaUic ; cilia grayish with pale brownish fuscous tips. Hindwing: 

 Upper surface white, terminal line narrow, pale buff. Fringe white. 

 Male genitalia (figs. 16-16b): Asymmetrical. The hooklike pro- 

 duction from dorsal basal lobe of harpe greatly expanded about mid- 

 way between base and distal end. Uncus normal. Aedeagus long, 

 slender; cornuti consisting of numerous short spinules in a linear 

 arrangement. 



Female genitalia (fig. 20): The tonguelike projection strongly 

 bifurcate, apices sharply pointed, median area of bifurcation angulate 

 and rather deep; the projection divided into two elements from base of 

 bifurcation to near loop of the projection, the ventral element narrow, 

 straplike. Ventral margin of ostium moderately sclerotized, with a 

 short, stout, sharp, angulate medial production. Signum obsolescent; 

 one or none; if discernible, a very small, round, weakly sclerotized 

 patch. 



Type: Male, in U.S. National Museum, USNM 65008. 



TypelocaHty: Brownsville, Texas. 



Paratypes: Texas: Brownsville, 2 males; San Benito, 3 males, 

 1 female; Brewster Co., 1 female. Arizona: Baboquivari Mountains, 

 Pima Co., 1 male and 1 female; Redington, 1 female. 



