NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 665 



Harpe simple, but with large ventrobasal development of sacculus. 

 Lateral aspect: costa and sacculus fused, shortened but markedly- 

 expanded ventrad and mesad, comprising slightly less than basal 

 three-sevenths of harpe, glabrous except for ventral development of 

 sacculus, broadest near apical extremity, approximate basal half 

 strongly narrowing to acute basal extremity, ental portion of sacculus 

 strongly developed mesad and ventrad into prominent process best 

 seen in ventral aspect ; process of sacculus large, broad, well sclerotized, 

 extending as far caudad as apical extremity of sacculus, approximate 

 basal three-fifths fused with sacculus, apical two-fifths free and ex- 

 panding toward apex, apical fifth rather sparsely punctate, apex with 

 broad and shallow emargination, lateral extremity of apex narrowly 

 rounded, mesal extremity of apex acute. Cucullus somewhat variable, 

 more slender in some specimens than in others, indistinctly fused 

 with costa and sacculus, elongate, slender, base rather weakly punc- 

 tate, remainder of cucullus becoming more heavily punctate entad 

 and ectad toward apex, approximate apical third heavily setose 

 entad and curving mesad, approximate apical two-thirds curving 

 somewhat ventrad, basal half with margins well sclerotized and par- 

 allel, apical half with ventral margin gradually expanded ventrad 

 to give apical third capitate appearance, apex broadly and evenly 

 rounded. 



Transtilla with arm well sclerotized, glabrous, approximately one- 

 fourth as long as harpe, basal half divergent from and apical half 

 convergent with dorsal margin of costa, apical fourth curving ventrad 

 beyond basal extremity of harpe, apex acute. 



Uncus single, partially and indistinctly separated from tegumen 

 by areas of reduced sclerotization. Dorsal aspect: base large, mesal 

 portion rather weakly sclerotized and glabrous; lateral margins 

 heavily sclerotized, sparsely punctate and setose, sinuate, converging 

 caudad into base of uncal process. Uncal process of medimn length, 

 rather robust, heavily sclerotized, curving strongly ventrad, apex 

 subacute. 



Gnathos weakly paired, well sclerotized (especially along lateral 

 margins), directed ventrocaudad ; arms very short, separated by shal- 

 low apical emargination, well sclerotized, rather weakly scobinate 

 dorsad, apices broadly and evenly rounded. 



Anellus medium sized, membranous, unarmed, juxta absent. 



Aedeagus medium sized, approximately five-sevenths as long as 

 harpe, cylindrical, moderately asymmetrical, sublinear in dorsal and 

 ventral aspects, in lateral aspect basal and apical portions curving 

 ventrad through total arc of approximately 135°; base very broadly 

 expanded laterad and ventrad, flattened, platelike, opening broadly 

 cephalodorsad; central third rather slender, tubular; approximate apical 



