NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 549 



and gradually curving ventrad toward apices, basal portions sparsely 

 punctate and setose, apical portions glabrous, gradually narrowing 

 distad to acute apices. 



Gnathos typically paii'ed, curving ventrocaudad, well sclerotized; 

 arms rather short and broad, finely and densely pitted entad, diverg- 

 ing distad, apices broadly and unevenly rounded. 



Anellus membranous, unarmed, juxta absent. 



Aedeagus of medium length and width, approximately two-thirds 

 as long as harpe, sublinear in dorsal and ventral aspects, basal and 

 apical portions directed slightly ventrad in lateral aspect, cylindrical, 

 asymmetrical, glabrous, base unexpanded and opening dorsad, ap- 

 proximate apical half to two-thirds opening broadly dorsad and con- 

 sisting of well sclerotized ventral wall expanding slightly toward apex, 

 apex irregularly rounded and emarginate. 



Vesica large, membranous, consisting of several infolded layers, 

 armed dorsad with approximately 50 minute cornuti ; cornuti more or 

 less alined in dense row in central portion and also scattered through 

 apical portion of vesica, mostly subtriangular and acute, pointing in 

 all directions, variously sized, some short and triangular, others longer, 

 several asymmetrically bifid. 



Type. — Type cfin the Academy of Natural Sciences of Philadelphia. 



Type locality. — Presumably Philadelphia, Pa. 



Distribution. — Central and eastern United States. Nebraska and 

 Texas eastward to New Hampshire and Florida. 



Specimens examined. — 317, from 80 localities, as follows (the 

 large number of specimens available for study has made it advisable 

 to reduce the distributional data for this common species largely to 

 the localities and months of occurrence) : 



Arizona: One c? from the American Museum of Natural History, labeled 

 "Ariz., Chas. Palm, Don. 1911"; this record is very questionable. Arkansas: 

 Camden (June). Connecticut: East River (July); Hamden (July); High Ridge 

 (July); New Haven (June). Florida: Clewiston (April); Florida City (June, 

 Sept.) ; Gainesville (June and July, traplight) ; La Belle (April) ; Lake Placid 

 (July, Archbold Biological Station) ; Orlando (April, June, Aug.) ; Port Sewall (Ap- 

 ril); Punta Gorda (May); Sanford (April, June); Stemper (June); Tampa (April 

 and May, at light) ; Winter Park (May, June, July) . Georgia: Screven Co. (July, 

 1 9 with mite on abdomen); Spring Creek, Decatur Co. (June, July); Tallapoosa 

 (July). Illinois: Dubois (July, at light); EUzabethtown (June, at light). 

 Indiana: Hessville (June, July); Scottsburg (June); Tremont (June, July). 

 Kansas: Caldwell (June, at light); Douglas Co. (June); Manhattan (June); 

 Medora (June); Montgomery Co. (June). Maryland: Baltimore (July). 

 Mississippi: A. & M. College, State College (June, July). Missouri: Glencoe 

 (June); Kirkwood (May, June, Sept.); Mineola (July); St. Louis (June). Ne- 

 braska: Lincoln (June, July). New Hampshire: Franconia (no date). New 

 Jersey: Browns Mills (May); Irvington (July); Lakewood (May); New Bruns- 

 wick (July); Ramsey (June, Sept.); Weymouth (June). New York: Millwood 

 (June), Long Island: Brooklyn (no date); Greenport (Aug.); Mattituck (July); 



