410 CRAYFISHES. 
CAMBARUS Erichson. 
Camparus Erichson, Arch. Naturgesch., 1846, 12, 1, p. 88. 
§I. Third segment of the third pair of legs of the male furnished with 
hooks. First pair of abdominal appendages of the male stout, inner and outer 
parts closely appressed, laterally compressed, with a horny (in the first form) 
spine at the tip; anterior margin with a prominent shoulder near the distal end. 
(Subgenus ProcamBarus of Ortmann.) 
1. CAMBARUS DIGUETI. 
Cambarus digueti Bouvier, Bull. Mus. Hist. Nat. Paris, 1897, 3, p. 225. 
Cambarus carinatus Faxon, Proc. U. 8. N. M., Feb. 17, 1898, 20, p. 648. 
Type locality: — Guadalajara, Mexico. Type, U.S. N. M., No. 17,699, 1 of. 1; 
paratypes, U. 8S. N. M., No. 16,085 (Ameca, State of Jalisco, Mex.), 17,707 
(Hacienda de Villachuato, State of Michoacan, Mex.); M.C. Z., No. 4,338 
(Ameca, Mex.). 
Type locality: — Affluents of River Santiago, State of Jalisco, Mexico. Co- 
types, Mus. Hist. Nat. Paris; U.S. N. M., No. 30,579; Carnegie Mus. Pittsburgh. 
2. CAMBARUS WILLIAMSONI. 
Cambarus (Procambarus) williamsoni Ortmann, Annals Carnegie Mus., 
1905, 3, p. 439. 
Type locality: — Los Amates, Province of Izabal, Guatemala. Types, 
Carnegie Mus. Pittsburgh. 
3. CAMBARUS PILOSIMANUS. 
Cambarus (Procambarus) pilosimanus Ortmann, Proe. Washington Acad. 
Sci., May 3, 1906, 8, p. 6. 
Type locality: — Coche, near Coban, Guatemala. Types, Mus. Hist. Nat. 
Paris; paratypes, Carnegie Mus. Pittsburgh (1 @ f.1.,1 2). 
4. CAMBARUS MEXICANUS. 
Astacus (Cambarus) mexicanus HErichson, Arch. Naturgesch., 1846, 12, 1, 
p- 99. 
Cambarus aztecus Saussure, Rev. et Mag. Zool., 1857, ser. 2, 9, p. 503. Type 
locality: —Tomatlan [State of Vera Cruz?] Mexico. Colypes, Geneva Mus.; 
U.S. N. M., No. 20,682 (1 & ex Geneva Mus.). 
Cambarus ruthveni Pearse, 13th Rept. Mich. Acad. Sci., 1911, p. 110. Type 
locality: — Cuatotolapam, Canton of Acayucan, State of Vera Cruz, Mexico. 
Types, Mus. Univ. Michigan, No. 41,704, 41,705, 1 ¢#,1 9. 
Type locality: — Mexico. Type seemingly lost from the Berlin Mus. 
