NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 541 



head, diverging from thorax distad, heavily clothed with scales. 

 Eyes large, protruding, rather densely setose, moderately lashed with 

 elongate setae. Antennae simple, with each segment globose and 

 completely encircled by distinct ring of scales. Both fore wings and 

 hindwings brownish, with httle or no color pattern, fringes slightly 

 paler. Abdomen pale brown. Wing expanse: 11 to 16 mm. 



Female. — Coloration similar to that of cf although generally paler. 

 Labial palpi short, partially recurved, diverging from head and from 

 each other distad, densely clothed with scales. Eyes fairly large but 

 less protruding than in cf , moderately setose, weakly lashed. Anten- 

 nae simple, slender, completely covered by scales. Wing expanse: 

 19 mm. 



Male genitalia. — Vinculum typical, as in other species. 



Tegumen with lateral arm broad but narrowing sharply near point 

 of articulation with vinculum, sparsely punctate along dorsocaudal 

 margin; dorsal area rather narrow, not separated along meson. 



Harpe simple. Lateral aspect: slender, somewhat constricted near 

 center, apical two-fifths curving somewhat ventrad; costa and sacculus 

 fused, glabrous except for punctate and setose ventrocaudal margin 

 of sacculus, apical portion considerably expanded ventrad, approxi- 

 mate basal half narrowing somewhat toward base, basal extremity 

 rounded ; cucullus fairly well set off from costa and sacculus by ventral 

 constriction near base, comprising approximate apical half of harpe, 

 rather slender, heavily punctate and setose ectad and entad, apical 

 four-fifths curving noticeably ventrad, apical haK slightly expanded 

 and with dorsal and ventral margins subparallel, apex evenly rounded. 



Transtilla with arm of medium length, rather slender, glabrous, 

 subparallel with to considerably divergent from dorsal margin of 

 costa, terminating acutely considerably distad of basal extremity 

 of harpe. 



Uncus simple, except at extreme apex. Dorsal aspect: base with 

 cephalic margin weakly emarginate mesad, laterobasal areas heavily 

 punctate, lateral margins sublinear and converging distad into base 

 of uncal process; uncal process of medium length and width, tubular, 

 sparsely punctate and setose, curving somewhat ventrad toward apex, 

 extreme apex minutely and acutely bifid. 



Gnathos fused, in form of moderately sclerotized flap directed ven- 

 trocaudad, lateral margins weakly sinuate and converging distad into 

 broadly rounded apex, dorsal surface of apex finely pitted, 



Anellus large, membranous, unarmed, juxta absent. 



Aedeagus rather large in comparison with other genital structures, 

 asymmetrical, glabrous, basal extremity weakly expanded, base curv- 

 ing considerably ventrad, basal two-fifths cylindrical, approximate 

 apical three-fifths broadly opening dorsad and gradually curving 



