NORTH AMERICAN ACROLOPHIDAE — ^HASBROUCK 529 



as broad as basal portion, apex broadly and evenly rounded dorsad 

 and rather irregularly rounded ventrad. 



Transtilla with arm glabrous, well sclerotized, slender, short, one- 

 fourth to one-fifth as long as harpe, basal half diverging from and 

 apical half converging toward margin of costa, terminating subacutely 

 considerably caudad of basal extremity of harpe. 



Uncus obscurely bifid, similar to that of jurcatus. Dorsal aspect: 

 base glabrous, lateral margins set off from tegumen by irregular areas 

 of reduced sclerotization, mesocephalic portion indistinctly fused 

 with tegumen, lateral margins very heavily sclerotized and evenly 

 converging caudad into furcae; angle of bifurcation entirely obscured; 

 furcae approximate, superficially appearing as single process with 

 median longitudinal suture especially in dried or untreated specimens, 

 elongate, narrow, heavily sclerotized, directed caudad and slightly 

 ventrad, lateral margins sparsely punctate and setose, apices acute. 



Gnathos fused, rather elongate and slender, directed caudad and 

 slightly ventrad, mesal portion weakly sclerotized, apical portion 

 heavily scobinate dorsad and with weakly sclerotized ventral expansion 

 densely clothed with minute seta-like processes; lateral margins 

 heavily sclerotized, gradually and evenly converging distad to rather 

 narrowly rounded apex. 



Anellus large, membranous, unarmed, juxta absent. 



Aedeagus rather elongate and slender, approximately as long as 

 harpe, cylindrical, asymmetrical, glabrous, sublinear in dorsal and 

 ventral aspects except for apical portion irregularly curving somewhat 

 sinistrad; base slightly expanded, emarginate ventrad, opening 

 broadly dorsad ; approximate apical half opening broadly lateroventrad 

 and consisting of irregular, sclerotized, dorsal strip curving ventrad 

 and back upon itself through angle of approximately 135° in lateral 

 aspect; apex consisting of large, heavily sclerotized, acute, spinelike 

 process extending free beyond vesica. 



Vesica rather large, membranous, unarmed. 



Type. — cf and 9 types in the British Museum (Natural History). 



Type locality. — "Arizona." 



Distribution. — Southwestern United States. Arizona. 



Sources of material: American Museum of Natural History 

 (1 cT, 1 9); Denison University (1 cT). 



Specimens examined. — 3 (2 cf cf, 1 9), from 2 localities, as follows: 



Arizona: Hualapai Mountains, cf (July 15-30, 1921, 0. C. Duffner); locality 

 and date unknown, cf ("Arizona"), 9 ("Ariz., Chas. Palm, Don. 1911"). 



Remarks. — This subspecies undoubtedly ranges southward into 

 Mexico. Its synonym, leucallaciis Meyrick, was described from 

 Nogales, Santa Cruz County, Ariz., just north of the Mexican border. 



