PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 119 



west of the Blue Ridge) in Virginia, and by C. I. chasmodactylus in 

 Greenbrier drainage in Pocahontas County, W. Va. South: rep- 

 resented by a I. longulus in the upper Yadkin drainage of Wilkes 

 County (east of the Blue Ridge) and by C. I. longirostris in Will's 

 Creek (Coosa River drainage), DeKalb County, Ala. East: in the 

 upper piedmont provmce by C. I. longulus from the Rivanna River 

 (James drainage), Fluvanna County, Va, southward to the Yadkm 

 River in North Carolma. West: by C. I. chasmodactylus from the 

 Greenbrier River in West Virginia and C. I. longirostris from a du-ect 

 tributary to the Tennessee River iu Lawrence County, Tenn. (Map 1). 



Key to Subspecies of Camharus longulus 



1. Suborbital angle well defined and acute .... longirostris Faxon (1885) 

 Suborbital angle markedly reduced or absent, never acute 2 



2 Length of dactyl of chela less than twice the length of the inner margin of 



■ the palm longulus Girard (1852 



Length of dactyl of chela twice (or more) the length of the inner margm of 

 the palm chasmodactylus, new subspecies 



Camharus longulus longulus Girard 



Camharus longulus Girard, 1852, Proc. Acad. Nat. Sci. Philadelphia, vol. 6, p 90. 



Camharus longulus Faxon, 1890 (part) pp. 623, 624.-Ortmann, 1902 p. 277.- 

 Harris, 1903 (part) p. 107.— Fowler, 1912, p. 344.— Ortmann, 1913 (part), 

 pp 335, 337, 339, 352, 353, 375, 376.— Brimley, 1938, p. 503. 



Camharus Bartonii Hagen, 1870 (part), pp. 7, 9. 75, 78, 79.-Faxon, 1884 (part), 

 p. 145; 1885a, pp. 11, 64, 66. • iohq 



Camharus hartonii longulus. -Fe^xon, 1885a, p. 66 (by imphcation). -Harris 1903 

 (part), pp. 58, 107, 138, 142, 154-155, 159.— Faxon, 1914, pp. 390, 424. 



Camharus longulus longulus.— -Ray, 1899 (by implication) (part), pp. 959, 966.— 

 Ortmann, 1913 (part), pp. 336, 337, 375.-Hobbs 1950, p. 349; 1959 (part), 

 896.-Johnson, R. M., 1957, pp. 178, 182; 1959, pp. 181, l83.-Johnson, 



Camharus (Bartonius) longulus.— Ortmann, 1905 (part), pp. 120, 122, 128, 129. 

 Camharus (Camharus) longulus longulus.— Ortmann, 1931 (part), pp. 106, 107, 

 108, 118-121, 123, 124, 128, 134. 



Diagnosis.— Concolorous, or speckled, in shades of blue to orange. 

 Rostrum with swoUen margins, lacking margmal spines or tubercles, 

 tapering somewhat abruptly to a short acumen, length .40-1.1 (aver- 

 age .95) times postorbital width. Suborbital angle and branchio- 

 stegal spines strongly reduced or absent; lateral spmes or tubercles 

 on carapace usually present, but absent in certain populations; 

 postorbital spines and ridges weak. Areola from 29 to 42 (average 

 37) percent of length of carapace: 2.3-5.9 (average 3.5) times longer 

 than broad; and with 4-6 punctations across narrowest part. An- 

 tenna! scale 1.7-3.2 (average 2.5) times longer than broad (pi. la). 

 Chela (pi. \j-m) ahnost devoid of tubercles; inner margin of palm 



