REVIEW OF MOTH GENUS HAIMBACHIA — CAPPS 637 



quiriguella. H. prestonella appears to be a more northern species and 

 restricted to Mexico. 



Haimbachia pallescens, new species 



Figures 4, 21 



Alar expanse: Male and female 18 mm. 



Frons conical. Head and thorax white, with some intermixtm-e of 

 yellowish brown. Palpi white, mixed with pale fuscous. Forewing: 

 Upper surface white, irrorated with brown, the irroration extending to 

 or almost to termen. The transverse markings weak and poorly 

 defined; medial line very narrow, brownish; origin from middle of 

 costa, strongly oblique outward to vein 7, loop enclosing end of cell, 

 broad, strongly inward from outer angle of cell to slightly below origin 

 of vein 2, outward to about middle of vein 2, thence oblique inward to 

 inner margin of the wing, terminating near middle. Subterminal 

 band poorly defined, origin about one-fifth the length of costa before 

 apex, oblique outward to about vein 6 and almost to termen; inner 

 margin of the band strongly zigzag from vein 3 to inner margin, termi- 

 nating slightly before tornus; obsolescent in intervening area. The 

 indentation of inner margin at vein 2 deep and acute. Terminal line 

 narrow, weakly discontinuous, with two or three small fuscous patches 

 between veins lb and 3. Fringe of forewing metallic. Hindwing: 

 Upper surface white, lustrous; fringe white. 



Male genitalia (figs. 4, 4a) : Asymmetrical. Hooklike production 

 of dorsal basal lobe of left harpe long, slender, distal end a sharp 

 point; similar structure of right harpe shorter and conspicuously 

 enlarged basally. Uncus with two long, modified distal setae. 

 Aedeagus long, slender, somewhat narrower dis tally and without 

 cornutus. 



Female genitalia (fig. 21): The tonguelike projection bifurcate, 

 median area of bifurcation broadly concave. Ventral margin of ostium 

 with a median triangular production. Ductus seminalis origin about 

 midway between ostium and junction of ductus bursae with bursa 

 copulatrix. No signum. 



Type: Male, in U.S. National Museum, USNM 65003. 



Type locality : Redington, Arizona. 



Paratype : One female from the type locality. 



Food plant: Unknown. 



Remarks: The conical frons in combination with the narrow medial 

 line, poor definition of both the medial line and subterminal band, and 

 more extensive irroration, this extending to or almost to the termen, 

 will distinguish pallescens from all other species of the group. The two 

 conspicuous, modified distal setae of the uncus are diagnostic for the 

 male genitalia of pallescens; the broadly concave bifurcation of the 

 tonguelike projection, in combination with the triangulate median 



T70-179— 65 2 



