NORTH AMERICAN ACROLOPHIDAE — ^HASBROUCK 681 



dorsad in several elongate, slender, weakly sclerotized areas blending 

 with membrane of vesica. 



Vesica membranous, elongate, slender, armed at apex with two 

 cornuti, A third extremely minute cornutus may occur ventrad 

 between the two larger ones. These cornuti are rather indistinctly 

 associated with the weakly sclerotized dorsal areas of the apex of the 

 aedeagus, and thus might be considered as armature of the latter. 

 However, they are fairly flexible and seem to be more closely associ- 

 ated with the vesica. Cornuti: one located at extreme apex of vesica, 

 other with apex just reaching base of first cornutus; small, approxi- 

 mately equal in size, well sclerotized, acute, directed distad. 



Type. — Holotype cf in the American Museum of Natural History 

 at New York City. 



Paratypes (2 cf d^, 1 9). — American Museum of Natural History 

 (1 d', 1 9); U.S. National Museum (1 cf ). 



Type locality. — Terlingua, Brewster Co., Tex, (July 3, 1948, 

 C. & P. Vaurie). 



Distribution. — Southwestern United States. Southwestern Texas. 



Specimens examined.- — 4 (3 cf cf, 1 9), from 2 localities: 



Texas: Fort Davis, Jeff Davis Co., cf, 9 (July 2 1948 C. and P. Vaurie); 

 Terlingua, Brewster Co., 2 cf cf (July 3, 1948, C. and P. Vaurie). 



Remarks. — This species undoubtedly ranges southward into 

 Mexico. It is apparently quite rare in collections. A. vauriei is 

 closely related to variabilis, seculatus, and macrophallus , forming with 

 them a distinct species group. This group has been characterized 

 in the key and in the foregoing remarks on variabilis. 



A. vauriei may be separated from its close relatives, as well as from 

 the other species treated here, on the basis of its genital structure. 

 Its aedeagus is not greatly elongated and it does not tend to extrude 

 from dried spechnens. The vesica of this organ is armed at its apex 

 with two or three small cornuti. 



This species is named in honor of its collectors, Charles and Patricia 

 Vaurie. 



