. Bulletin - United States National Museum. 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); LancasterCo.: small pool 1 mile W of Rock Hill, J. W. Price, May, 1940 (USNM); springnear 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, March1961 (NMC). MARYLAND.—Garrett Co.: John Friends Cave,
. Bulletin - United States National Museum. 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); LancasterCo.: small pool 1 mile W of Rock Hill, J. W. Price, May, 1940 (USNM); springnear 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, March1961 (NMC). MARYLAND.—Garrett Co.: John Friends Cave, J. Hardy, August1950 (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 smaller2nd antenna (which does not exceed the 1st antenna in length inlarger males), nearly straight to very slightly concave propod palmarmargins of gnathopods, and more spines on uropod 1. Further SUBTERRANEAN AlVCPHIPOD STYGONECTES 67. Figure IS.—Stygonedes allegheniensis, new species. Male ( mm), Greggorys Cave,: a,h, gnathopod? 1,2; c, coxal plate of pereopod 3; d-f, pereopods 4,5,7; g, abdom-inal side plates; h,i, antennae 1,2; j, uropod 3; k,l, uropods 1,2; m, telson. Female( mm), same locality: n,o, gnathopods 1,2; p, telson; q, antenna 2; r, antenna 1;s-u, uropods 1,2,3; v, abdominal side plates. Male ( mm), John Friends Cave,Md.: w, telson. Male ( mm), small pool 1 mile W of Rock Hill, Pa: x,y, gnathopods1,2; z, pereopod 7. 68 NATIONAL MUSEUM BULLETIN 2 59 distinguished from S. hayi, to which it also closely related, by lessspinose telson in males, less spinose 1st iiropod in females, less spinose2nd uropod in both sexes, and by straighter posterior margins ofbases of pereopods 5-7. Largest males, mm; largest females, mm. Male.—Antenna 1 up to 50 percent as long as body, 20 to 25percent longer than antenna 2 in larger males;
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