NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 573 



weakly converging distad; angle of bifurcation rather narrow to 

 rather broad; furcae rather short, of medium width, tubular, well 

 sclerotized, heavily punctate and setose, rather broadly separated, 

 diverging distad, curving ventrad and gradually narrowing to acute 

 apices. 



Gnathos typically paired, with lateral and apical portions heavily 

 sclerotized, curving ventrocaudad; arms rather broad, flattened, finely 

 scobinate entad, apical portions parallel to partially overlapping, 

 apices broadly and evenly rounded. 



Anellus membranous, unarmed or with very weakly sclerotized 

 medio ventral area possibly representing trace of juxta. 



Aedeagus rather small and slender, approximately two-thirds as 

 long as harpe, asymmetrical and somewhat sinuate in all aspects, 

 glabrous, base weakly expanded laterad and emarginate ventrad, 

 approximate basal haK cylindrical, apical haK opening broadly dex- 

 trad and consisting simply of well sclerotized sinistral wall, apex 

 narrowly rounded to subacute. 



Vesica large, membranous, usually unarmed; occasionally armed in 

 central or dextral portion with one to at least five, extremely small, 

 variously shaped, acute cornuti. 



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



Type locality. — "Florida." 



Distribution. — Central and eastern United States. Missouri and 

 Arkansas eastward to Massachusetts and Florida. 



Specimens examined. — 156, from 43 locaUties. The large number 

 of specimens available for study has made it advisable to reduce the 

 distributional data for this fairly common species largely to the 

 localities and months of occurrence: 



Alabama: La Place, near Tuskegee (June); Leroy (June). Arkansas: 

 Camden (June). Florida: Fort Myers (April); Gainesville (June & July, trap- 

 light); Lake Placid (July, Archbold Biological Station); Merritt Island (Sept.); 

 Okeelanta (May); Orlando (June, at light); Punta Gorda (April); Winter Park 

 (May, June, July). Georgia: (?) Chessar's Island (June); Clayton (May, 2000 

 feet); Rabun Co. (June); Screven Co. (July); Spring Creek, Decatur Co. (June). 

 Illinois: Champaign-Urbana (June and July, both sexes frequent at light in 

 June) ; Chicago (June, July) ; Dubois (July, at light) ; Edgebrook (June) ; Homer 

 Park, Homer (June, at light); Mahomet (July, 2 & d" "at sugar"); Palos Park 

 (July, at light); Peoria (June, at light); Putnam County (June). Indiana: 

 Hessville (June, July). Massachusetts: Nantucket ("July 12-28," "Aug.l- 

 Sept. 15"). Mississippi: Biloxi (June); Lucedale (June). Missouri: Kirk- 

 wood (June, July); Mineola (July); St. Louis (June). New Jersey: Browns 

 Mills (June, July); Lakehurst (July); Lakewood (July). North Carolina: 

 Brevard (June); Maxton (May and Sept., 1 cf with mites on abdomen, 1 cf with 

 uncus abnormally broadened); Raleigh (June); Smokemont (June). Onio: 

 Granville (July). Pennsylvania: Finleyville (June); Wall (no date). South 

 Carolina: Myrtle Beach (June, July). 



