NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 657 



(12cf cf'); Carnegie Museum (2 cfcf); Ohio State University (1 cf); 

 University of Kansas (1 cf ). 



Specimens examined. — 16 (all &&), from 3 localities: 



Arizona: Huachuca Mountains, cf (Aug. 1, 1927, mite on forewing, P. A. 

 Readio), d^ (July 20, 1937, with 5 mites, D. J. and J. N. Knull); Huachuca 

 Mountains, Cochise Co., 5 cf cf (Ramsay Canyon, July 10-15, 1941, A. B. Klots), 

 7 cT cf' (Ramsay Canyon, July 16, 1948, C. and P. Vaurie); Palmerlee, Cochise 

 Co., cf (date and collector unknown); locaUty and date unknown, c? ("Arizona," 

 Engel collection). 



Remarks.- — This species undoubtedly ranges southward into Mex- 

 ico. It is not closely related to any of the acrolophids known to occur 

 in America north of Mexico. Acrolophus quadrellus is generally 

 related to those species having shortened labial palpi and antennae 

 in which each segment is clothed only dorsad or dorsolaterad with 

 scales. Specifically, it may be easily distinguished from all other 

 species treated here by three of its genital structures. These struc- 

 tures are not only distinctive but also clearly observable in undissected 

 specimens. The apex of its uncal process is acutely bifid; the cucullus 

 of its harpe is densely setose and prominently dentate along the 

 ventral margin ; and, its gnathos is characteristically paired by a very 

 broadly and evenly rounded angle of bifurcation. The arms of the 

 gnathos are divergent and elongate, with their apical halves narrow- 

 ing and becoming very heavily sclerotized distad. This type of 

 gnathos is both atypical and unique among the species under con- 

 sideration. The genital structure of this fairly large acrolophid is 

 quite consistent throughout my series of specimens. 



I have examined the type 9 specimen at the U.S. National Museum. 

 It is labeled "Pseudanaphora quadrellus B. & McD., Palmerlee, 

 Arizona." This type, along with a series of "cotypes" representing 

 quadrellus, has recently been assigned a type number during the 

 course of this revision. Since the taxonomy of this group is at present 

 based almost entirely upon the cf' d^ of the various species, it is best 

 to select cf cf for holotypes. However, the 9 representing quad- 

 rellus may be correlated with the cf & with reasonable certainty by 

 reference to the Museum's determined series from which it was origi- 

 nally selected. This series contains a number of both sexes, all from 

 the same locahty and all labeled as "cotypes." My examination 

 of a slide preparation of cf genitalia labeled "Acrolophus quadrellus 

 B. & McD., Cotype, Palmerlee, Ariz." confirmed the identity of this 

 species. Carl Heinrich loaned me two slide preparations of genitalia 

 representing both the cf and 9 paratypes of quadrellus. These 

 mounts furnished further confirmation of the identity of this moth. 



Contrary to the comments accompanying the original description 

 of quadrellus, the latter is not at all closely related to davisellus. 



