62 U.S. NATIONAL MUSEUM BULLETIN 259 



and it is possible that they may no longer be in existence. A third vial 

 from the Yale Peabody Museum, however, contained a small male and 

 two small females collected from a well at Westville, Conn, (pre- 

 sumably now a part of the city of New Haven). During the spring of 

 1965, Mr. and Mrs. John E. Cooper visited several springs in the 

 vicinity of New Haven with hopes of finding this species, but new 

 material could not be located at that time. 



Stygonectes tenuis potomacus, new subspecies 



Figure 13 



Material examined 



Washington, D.C. — Georgetown: bog in Burleith Woods, male holotype, female 

 allotype, and 67 paratypes, A. Pizzini, Mar. 19, 1938 (USNM); other paratypes 

 (collected by A. Pizzini, in USNM) as follows: stream source, 1.5 miles above 

 Wetzels Spring, May 2, 1934; spring in Glover Archbold Parkway, Apr. 30 and 

 May 13, 1934; bog in Burleith Woods, 9 collections made between Apr. 18, 1936, 

 and Mar. 26, 1938; springs in Burleith Woods, 6 collections between May 17, 1934, 

 and Mar. 8, 1936; spring in Burleith Woods, D. Padgett, Apr. 23, 1936. Other 

 material (in USNM unless otherwise indicated): Washington, d.c. — swamp, 1 to 

 2 miles below Chain Bridge, A. Pizzini, March 1933 and 1934; W. H. Ball, same 

 site, March 1934; brook emptying into Potomac River, 1 mile above Washington, 

 D.C, R. S. Tarr, Mar. 13, 1883; bog near Military Road, A. Pizzini, Oct. 10, 1937; 

 spring in Ft. Dupont Park, W. H. Ball, Apr. 24, 1939; Ft. Dupont Park, Oct. 27, 

 1939 (no other data on label); small spring on S side of Zoological Park (1 small 

 female in coll. with cotypes of S. hayi), L. Hubricht, Mar. 9, 1938 (LH) ; small 

 spring in Montrose Park, L. Hubricht, March, 9, 1938 (LH). Virginia. — Arling- 

 ton Co.: spring at Glencarlyn, C. R. Shoemaker, July 7, 1918; well at Clarendon, 

 P. Hanson, July 3, 1918, and Apr. 1, 1920; Falls Church: well, W. Erwin, No- 

 vember 1917, August 1918, and September 1918; Prince William Co.: well, W. R. 

 Asburn, May and June 1943, and June 1945; Fairfax Co.: pool at Dyke, W. H. 

 Ball, Dec. 31, 1934; small pools between Belle Haven and Dyke, W. H. Ball, 

 Apr. 14, 1935; near Mt. Vernon (habitat data not given on label), M. K. Brady, 

 May 10, 1934; pond 1 mile W of McLean, A. Pizzini, Feb. 5, 1938; springs and 

 spring runs near Scott Run, A. Pizzini, 7 collections between Dec. 1, 1935, and 

 Mar. 7, 1937; Loudon Co.: stream near Middlebiu-g and spring bog near same 

 town, A. Pizzini, Jan. 29, 1938, and May 12, 1939, respectively. Well near 

 Richmond, L C. Riggin (no other data given). Maryland. — Prince Georges Co.: 

 boggy places in woods S of Stoddard Road in Cheverly, A. Pizzini, Mar. 12, 1941 ; 

 small stream N of University of Maryland campus near dairy barn, E. H. HoUis, 

 Apr. 2, 1938; Ann Arundel Co.: spring near Bristol, A. Pizzini, Oct. 31, 1937; 

 sphagnum bog. Glen Burnie, F. C. Baker, Feb. 22, 1936; Montgomery Co.: 

 sphagnum and silt, and bogs and streams, Bm-nt Mills, A. Pizzini, Nov. 11, 1934, 

 and Mar. 20, 1938; bog Yi mile N of Massachusetts Ave., NW, past Wisconsin 

 Ave., A. Pizzini, Feb. 11, 1939; nest of ants, Fairland, Haverland, Oct. 24, 1935; 

 Frederick Co.: artesian well on S side of Sugarloaf Mt., T. Ulke, Apr. 17, 1938; 

 spring and stream near top of Sugarloaf Mt., W. H. Ball, Apr. 9 and 17, 1938. 

 WEST VIRGINIA. — Jefiferson Co.: spring on Blue Ridge Mountains E. of Kabletown, 

 E. T. Wherry, March 23, 1930. Pennsylvania. — Adams- Franklin Co. line: 

 open stream at Caledonia State Park, A. Pizzini, July 11, 1937. 



