66 U.S. NATIONAL MUSEUM BULLETIN 259 



Stygonectes allegheniensis, new species 



Figure 15 



Synpleonia pizzinii Shoemaker, 1938, p. 137 (in part). — Dearolf, 1941, p. 171 



(in part). — Shoemaker, 1942a, p. 31 (in part). 

 Synpleonia hayi Hubricht and Mackin. — Dearolf, 1941, p. 171. — Hubricht, 1943, 



p. 709 (in part). — Nicholas, 1960, p. 130 (in part). 

 Synpleonia tenuis (Smith). — Hubricht, 1959, p. 878 (in part). — Nicholas, 1960, 



p. 130 (in part). 



Material examined 



NEW YORK. — Herkimer Co.: spring, Ilion, male holotype, female allotj'pe, and 42 

 paratypes, L. Hubricht, Apr. 3, 1948 (USNM and slide mounts of 2 paratypes 

 in JRH). 



Additional material as follows: new york. — Albany Co.: Greggorys Cave, 



F, D. Stone, May 31, 1964 (JRH); Onesquethaw Cave, F. D. Stone, July 20, 

 1963, F. Howarth, July 31, 1965, and L. G. Conrad, Aug. 3, 1963 (JRH); Wards 

 Cave, F. D. Stone and F. Howarth, July 21, 1963, and Mar. 20, 1965 (JRH); 

 Skull Cave, F. D. Stone, June 9, 1964 (JRH); Hailes Cave, E. L. Cheatum, 

 Aug. 17, 1939 (USNM); Schoharie Co.: McFails Hole Cave, F. Howarth, July 

 14, 1963, and F. Howarth and J. Hayes, June 4, 1963; Herkimer Co.: springs, 

 5 miles SW of Ilion, L. Hubricht, Apr. 25, 1954 (LH) ; seeps 2 miles N of Middle- 

 ville, L. Hubricht, May 24, 1943 (LH); seep 1 mile ESE of Little Falls, L. Hu- 

 bricht, Apr. 18, 1943 (LH); Onondaga Co.: well, Green Lake State Park at 

 Fayetteville, W. Dence, Apr. 10, 1943 (LH) ; driven well near Otisco Lake, 



G. C. Barber, Aug. 1, 1944 (LH) ; Livingston Co: old well at Springwater, W. S. 

 Davis, Aug. 2, 1933 (USNM); Steuben Co.: driven pipe well at Wallace, Feb. 

 2, 1937 (USNM); Chemung Co.: well at Horsehead, O. Hauenstein, July 1917 

 (USNM); Chenango Co.: wells and springs at Sherburne, S. Sharki, Nov. 27, 

 1944 (USNM), PENNSYLVANIA.— Fayette Co.: Barton Cave, R. Hoflfmaster 

 and E. Taylor, Dec. 19, 1949 (2 spec, in USNM, 1 spec, in LH); Westmorland 

 Co.: Bear Cave Sink, R. Hoflfmaster, no date on label (USNM); Centre Co.: 

 Millers Cave, J. R. Holsinger and J. Stellmack, May 18, 1965 (JRH); Veiled 

 Lady Cave, Apr. 4, 1937 (USNM); Mifflin Co.: Goss Cave, J. Haas, Nov. 1, 

 1959 (JRH); Johnson (Upper) Cave, K. Dearolf, Dec. 12, 1936 (USNM) and 

 J. R. Holsinger, May 19, 1965 (JRH) ; Lebanon Co.: spring near Shaeflferstown, no 

 other data (USNM); spring on Stony Mt., Yi mile NE of Cold Spring, P. J. 

 Spangler, Apr. 3, 1948 and May 3, 1948; and spring on side of Stony Mt., Indian- 

 town Gap, P. J. Spangler, Apr. 18, 1948 (USNM); St. Josephs Spring in Indian- 

 town Gap Military Reservation, J. R. Holsinger, May 19, 1965 (JRH); Lancaster 

 Co.: small pool 1 mile W of Rock Hill, J. W. Price, May, 1940 (USNM); spring 

 near Roherstown Pike along Conestoga Creek, J. W. Price, Apr. 11, 1937 (USNM) ; 

 Spring Branch (habitat and collector not given). May 17 and Aug. 27, 1945 

 (USNM); Monroe Co.: Angle Spring near Stroudsbiug, F. A. Buser, March 

 1961 (NMC). MARYLAND. — Garrett Co.: John Friends Cave, J. Hardy, August 

 1950 (USNM and LH) and J. R. Holsinger, July 8, 1962 (JRH). 



Diagnosis. — A medium-sized to moderately large species distin- 

 guished from S. tenuis, to which it is closely related, by the smaller 

 2nd antenna (which does not exceed the 1st antenna in length in 

 larger males), nearly straight to very slightly concave propod palmar 

 margins of gnathopods, and more spines on uropod 1. Further 



