660 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 114 



(especially toward base), lateral margins well sclerotized and scobinate, 

 apex broadly and evenly rounded or weakly emarginate. 



Anellus large, membranous, armed ventrad with juxta. Juxta fused 

 with basal portions of harpes and may represent developments of latter, 

 located slightly ventrad of and articulated to dorsal margins of approx- 

 imate basal three-eighths of harpes, lying just ventrad of and serving 

 as fulcrum for aedeagus, consisting of two heavily sclerotized processes 

 connected by membranous mesal area; processes subparallel through- 

 out most of their length, basal portions converging and fusing with 

 bases of harpes, apical portions somewhat expanded and divergent, 

 basal and apical portions curving somewhat ventrad in lateral aspect. 



Aedeagus rather short and slender, approximately five-eighths as 

 long as harpe, cylindrical, asymmetrical, approximately linear in dorsal 

 and ventral aspects, in lateral aspect apical tlu"ee-fifths considerably 

 narrowed and directed ventrad at angle of 45° and basal two-fifths 

 irregularly expanding toward basal extremity, in dorsal aspect approxi- 

 mate basal fifth very broadly expanded laterad and emarginate 

 dorsad, apical two-fifths to one-half opening broadly and irregularly 

 dorsad and consisting of rather broad ventral strip produced ventrad 

 near apex into prominent nodelike swelling; apex irregularly rounded 

 and armed with approximately 10-12 small, unequally sized, well 

 sclerotized, finely acute, spinelike processes directed distad. 



Vesica medium sized, membranous, unarmed. 



Type.' — ^Type cf (type no. 1843) in the U.S. National Museum. 



Type locality.- — ^Kerrville, Kerr Co., Tex. 



Distribution.^ — ^Texas westward to Arizona and northward to 

 Kansas and Colorado. 



Sources of material.^ — -American Museum of Natural History 

 (1 cf); Denison University (3 cf cf); Illinois State Natural History 

 Survey (1 cT); University of Kansas (1 cT). 



Specimens examined. — 6 (all cfcT), from 5 localities: 



Arizona: Boulder Springs, Mohave Co., 2 cT cf (July 1-15, 1921, one specimen 

 with mite on base of forewing, other with mite on abdomen, O. C. Duffner) ; Hua- 

 lapai Mountains, cf (July 15-30, 1921, O. C. Duffner); McNary, Apache Co., 

 cf (June 19, 1940, G. E. Pollard). Kansas: Clark Co., & (June, elevation 1962 

 feet, F. H. Snow). Texas: Locahty and date unknown, cf ("Tex.," Andreas 

 Bolter collection). 



Remarks. — This species probably ranges southward into Mexico. 

 It is here recorded from Colorado on the basis of its synonym, color- 

 adellus (Walsingham) , the holotypecf of which was collected in Custer 

 County, Colorado. 



A. minor is not closely related to any of the other acrolophids 

 known to occur in America north of Mexico. It is related to those 

 species having shortened labial palpi, naked eyes, and complex an- 



