NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 613 



ted caudad and curving slightly ventrad, gradually narrowing distad 

 to acute apex. 



Gnathos fused, distinctive; elongate, flattened, directed caudo- 

 ventrad, with mesal area of reduced sclerotization ; lateral margins 

 heavily sclerotized, linear, evenly converging distad to narrow but 

 rounded apex; apex usually thickened dorso ventrad and armed at 

 dorsolateral angles with pair of small, acute, dentate, somewhat diver- 

 gent processes, each sometimes followed basad by 2-3 similar but small- 

 er processes. 



Anellus large, membranous, unarmed, juxta absent. 



Aedeagus rather elongate, quite slender, cylindrical, subsym- 

 metrical, glabrous, sublinear in all aspects, of almost constant width 

 thi'oughout except for moderately expanded base and slightly ex- 

 panded apex, apical opening subcircular. 



Vesica membranous, large, cylindrical, broader than and approxi- 

 mately as long as aedeagus, commonly spiriform, armed at extreme 

 apex with single cornutus. Cornutus similar to that of 'pyramellus ; 

 basal half large, conical, moderately sclerotized, weakly costate, 

 tapering distad; apical half quite slender, more heavily sclerotized, 

 slightly cm"ved, tapering to finely acute apex. 



Type. — Type cf (type no. 4417) in the U.S. National Museum. 



Type locality. — Mesilla Park, Dona Ana Co., N. Mex. 



Distribution. — Western United States. Utah, Arizona, New 

 Mexico and Texas. 



Sources of material. — American Museum of Natural History 

 (3 cf c?"); California Academy of Sciences (11 &&,\ 9); Carnegie 

 Museum (1 cf); Cornell University (2 d^cf); Ilhnois State Natural 

 History Survey (1 cf ) ; U.S. National Museum (1 cf") ; University of 

 Kansas (1 &). 



Specimens examined. — 21 (20 cf cf, 1 9), from 15 locaUties: 



Arizona: Fort Grant, ^ (Pinaleno Mountains, July 13-19, 1917, Cornell 

 University Biological Expedition) ; Fort Huachuca, 2 cj^ c?" (Aug. 3, 1924, J. O. 

 Martin); Gila Bend, 4 c? cf (Aug. 20, 1924, E. P. Van Duzee and J. O. 

 Martin); Huachuca Mountains, ? (Carr Canyon, Aug. 4, 1924, J. O. Martin); 

 Paradise, Cochise Co., cT (July, O. C. Poling) ; Patagonia, cf (Aug. 2, 1924, E. P. 

 Van Duzee); Pima Co., "30 miles east of Quijotoa," cf (Aug. 28-29, 1927); 

 Pima Co., "16 miles south of Tucson," cf (Aug. 11, 1924, J. O. Martin); Pinal 

 Co., "6 miles south of Florence," cf (July 23, 1924, E. P. Van Duzee); San 

 Bernardino Ranch, Cochise Co., cf (Aug., elevation 3750 feet, F. H. Snow) ; 

 Santa Catalina Mountains, cf (Aug. 13, 1924, gnathos atypical, E. P. Van Duzee), 

 cf (Sabino Canyon, Aug. 13, 1924, gnathos atypical, Van Duzee), cf (Pepper 

 Sauce Canyon, Aug. 16, 1924, Van Duzee); Superior, & (Boyce Thompson 

 Arboretum, Aug. 2, 1937, gnathos atypical, A. B. Klots). Texas: Locality and 

 date unknown, cf ("Tex.," Andreas Bolter collection), cf ("Tex.," Henry Edwards 

 collection). Utah: Newton, c? (July 12, 1929, H. J. Pack). 



