Materials.
CANADA: ON: Middlesex Co. London, Southern Crop Protection Research Centre, pitfall trap/Masner trap, 21-VI-1995 , T. Sawinski (1); Simcoe Co., Noisy River, Prov. Nature Res., beaver lodge, 28-IX-2008 , S.A. Marshall (1).
Diagnosis.
At present, Acylophorus agilis is reliably separated from others in the diverse Acylophorus pronus -group only by the characteristically shaped paramere of the aedeagus (Fig. 169 in Smetana 1971 ).
This species is widely distributed in eastern North America, and was previously known from Indiana, Maryland, Massachusetts, Michigan, New York, North Carolina, Pennsylvania, Rhode Island, Missouri, ( Smetana 1971 ), Illinois, and Kentucky ( Smetana 1978 ). Herein we newly record it from Canada (Ontario) (Map 18). Acylophorus agilis has been collected in a variety of periaquatic habitats including 'floating grass patches’ in a eutrophic pond ( Smetana 1971 ), in sediment-laden debris at the edge of forest creeks ( Smetana 1978 ), at the edge of a sinkhole pond ( Watrous 2008 ), and from debris in a beaver lodge.
