NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 603 



Transtilla with arm rather short, basal portion broad, sublinear, 

 glabrous, weakly diverging from dorsal margin of costa toward sub- 

 acute apex, failing to reach base of harpe by its own length. 



Uncus simple. Dorsal aspect: base small, subtriangular, set off 

 from tegumen by areas of reduced sclerotization, sparsely punctate 

 and setose, laterobasal margins rounded, lateral margins converging 

 into base of uncal process; uncal process indistinctly fused with base, 

 rather elongate and slender, tubular, sparsely punctate and setose, 

 curving slightly ventrad toward apex, gradually narrowing distad, 

 apex acute. 



Gnathos fused, rather elongate and slender, directed ventrocaudad, 

 glabrous, somewhat thickened dorsoventrad, dorsal surface weakly 

 concave, lateral margins well sclerotized and parallel, apex broadly 

 and very evenly rounded. 



Anellus large, membranous; densely clothed with minute, seta- 

 like processes; juxta absent. 



Aedeagus elongate, slender, cylindrical, asjrmmetrical, glabrous, 

 sublinear in dorsal and ventral aspects, basal fifth curving somewhat 

 dorsad in lateral aspect, basal portion moderately expanded, apical 

 portion opening dextrad, apex narrowly rounded. 



Vesica rather small, membranous, basal portion narrowed; apical 

 portion bulbous, armed with single cornutus; cornutus rather small, 

 acute, directed distad. 



Type. — Type cf (type no. 15123) in the U.S. National Museum. 



Type locality. — La Puerta Valley, Calif. 



Distribution. — Western United States. California southward 

 into Mexico. 



Sources of material. — American Museum of Natural History 

 (5 cfcf); California Academy of Sciences (1 cf); Carnegie Museum 

 (3 cf cT); Mr. Alex K. Wyatt, Chicago, 111. (2 cTcf). 



Specimens examined. — 11 (all cf cf), from 2 localities: 



California: La Puerta, 8 d' cf (July 1911, Wright & Field); La Puerta 

 Valley, 2 cf cf (July 1911, Geo. H. Field). Mexico: Angeles Bay, Gulf of Cali- 

 fornia, cf (May 4, 1921, E. P. Van Duzee). 



Remarks. — The new name, jpseudohirsutus , is here proposed to 

 replace Busck's preoccupied name, hirsutus. This species is very 

 closely related to kearfotti, the two comprising a small species group. 

 The kearfotti-psevdohirsutus group consists of acrolophids having short 

 labial palpi, naked eyes, simple antennae Avith segments encircled by 

 rings of scales, simple uncus, and fused gnathos. These two species 

 may be easily separated from all other species treated here, as well as 

 from each other, by the structure of their harpes. They may also be 

 distinguished from the other acrolophids, although not from each 

 other, on the basis of their aedeagi. This great similarity of the 



