NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 673 



Male genitalia. — Vinculum rather large and elongate, retracted 

 well into abdomen in dried specimens. 



Tegumen glabrous; lateral arm elongate, very slender at point of 

 articulation with vinculum, gradually expanding dorsocaudad toward 

 dorsal area; dorsal area broad, not separated along meson. 



Harpe simple. Lateral aspect: greatly elongated, approximate 

 basal third very slender, central third expanding dorsad and ventrad 

 to about four times \vidth of basal third, approximate apical third 

 narrowed to about half width of central third; costa and sacculus 

 fused, greatly elongate, comprising approximate basal two-thirds to 

 three-fourths of harpe, glabrous except for punctate and setose ventro- 

 caudal margin of sacculus, apical two-fifths evenly expanded dorsad 

 and ventrad, basal three-fifths considerably narrowed, basal extremity 

 acute ; cucullus set off from costa and sacculus by ventral constriction 

 and dorsal dentations near base, relatively short, comprising apical 

 one-fourth to one-third of harpe, heavily punctate and setose except 

 for glabrous area near base, base somewhat constricted ventrad and 

 invariably produced dorsad into one to several prominent toothlike 

 processes, dorsal and ventral margins otherwise smooth and sub- 

 parallel, apex broad and bluntly rounded to subtruncate. 



Transtilla with arm elongate, slender, approximately one-third as 

 long as harpe, linear to sublinear, well sclerotized, glabrous, gradually 

 narrowing and diverging from dorsal margin of costa toward apex, 

 terminating subacutely considerably distad of basal extremity of 

 harpe. 



Uncus simple. Dorsal aspect: base large, subtriangular, rather 

 indistinctly fused with tegumen, large lateral areas heavily punctate; 

 lateral margins well sclerotized, punctate and setose, sublinear, 

 evenly converging distad into base of uncal process; uncal process 

 rather large, robust, slightly flattened and sparsely setose laterad, 

 gradually narrowing and curving ventrad to narrowly rounded apex. 



Gnathos fused mesad into broad, rather weakly sclerotized, glabrous 

 flap directed ventrocaudad; dorsal surface convex, ventral surface 

 concave, lateral margins gradually and evenly converging distad into 

 rather narrowly rounded apex. 



Anellus rather elongate, membranous; ventral surface slightly 

 thickened and densely clothed with minute, seta-like projections; 

 juxta absent. 



Aedeagus very slender, extremely elongate, half again to twice as 

 long as entire genital capsule, extending far back into abdomen when 

 at rest, cylindrical, asymmetrical, base expanded into small U-shaped 

 pouch, apex expanded dorsolaterad; basal two-thirds to three-fourths 

 slender, linear to sublinear; apical quarter to one-third weakly ex- 

 panded, curving considerably ventrad. Approximate apical quarter 



