NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 649 



Nine examples; Huachuca Mts., Arizona; July 16 to Aug. 23 (Dr. W. Barnes); 

 U.S. Nat. Mus., type No. 5343. 



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



Tegumen glabrous, width medium ; lateral arm narrowing gradually 

 to point of articulation with vinculum, cephalic margin weakly sin- 

 uate, caudal margin sublinear and well sclerotized; dorsal area 

 with cephalic margin sinuate and broadly emarginate mesad, caudal 

 margin irregular and partially fusing with base of uncus. 



Harpe simple but with distinct clasper arising from inner surface 

 of cucullus, very broad and robust. Lateral aspect : costa and sacculus 

 fused, comprising approximate basal four-sevenths of harpe, glabrous 

 except for rather large ventrocaudal area of sacculus clothed with 

 elongate setae, broadest at point of attachment of arm of transtilla, 

 approximate basal three-fourths narrowing to very narrow basal 

 extremity, apical portion abruptly narrowed dorsad at point of fusion 

 with base of cucullus. Cucullus indistinctly fused with costa and 

 sacculus, very sparsely punctate and setose, base broad, dorsal and 

 ventral margins heavily sclerotized, dorsal margin markedly sinuate, 

 ventral margin evenly expanding ventrad toward apex; apex very 

 broad, irregularly and bluntly rounded; well sclerotized ental area 

 arising from ventral margin of central third of cucullus curving dorso- 

 cephalad and terminating near dorsobasal extremity of cucullus in 

 heavily sclerotized, acute clasper curving toward meson of genital 

 capsule. 



Transtilla with arm glabrous, well sclerotized, considerably reduced, 

 only one-sixth to one-seventh as long as harpe, broadly separated 

 from margin of costa, terminating acutely far caudad of basal ex- 

 tremity of harpe. 



Uncus obscurely bifid. Dorsal aspect: base largely separated from 

 tegmnen by areas of reduced sclerotization, cephalic margin with 

 broad and deep mesal emargination mostly occupied by large caudal 

 expansion of tegumen, mesal area rather weakly sclerotized and 

 glabrous; lateral margins of base heavily sclerotized, sparsely punctate 

 and setose, weakly sinuate, converging caudad into bases of furcae; 

 angle of bifurcation extremely small, acute, located near midpoint of 

 main uncal process; furcae approximate, appearing almost as single 

 process in dried specimens, length medium, rather narrow, heavily 

 sclerotized, directed caudad and slightly ventrad, lateral margins 

 sparsely punctate, apices acute and slightly divergent. 



Gnathos fused, large and broad, curving ventrocaudad, mesal 

 portion of basal half weakly sclerotized; approximate apical half 

 fairly well sclerotized, considerably thickened dorsoventrad, heavily 

 scobinate dorsad, densely clothed ventrad with minute seta-like 



