410 CRAYFISHES. 



CAMBARUS Erichson. 



Cambarus Erichson, Arch. Naturgesch., 1840, 12, 1, p. S,S. 



§ I. Third segment of the third pair of leg.s of the male furni,shed 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. 



Camharus carinatus Faxon, Proc. U. S. N. M., Feb. 17, 1898, 20, p. 648. 

 Type locality: — Guadalajara, Mexico. Type, U. S. N. M., No. 17,699, 1 cf f. I; 

 parotypcs, U. S. 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, iVnnals Carnegie Mus., 

 1905, 3, p. 439. 



Type locality: — Los Amates, Pi'o\ince of Izabal, Guatemala. Types, 

 Carnegie Mus. Pittsburgh. 



3. Cambarus pilosimanus. 



Cambarus (Procambarus) pilosimarms Ortmann, Proc. 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 cT f. I., 1 9 ). 



4. Cambarus mexicanus. 



Astacus (Cambarus) mexicanus Erichson, 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. Cotypes, Geneva Mus.; 

 U. S. N. M., No. 20,682 (1 cf ex Geneva Mus.). 



Cambarus ruthveni Pearse, 13th Rept. Mich. Acad. Sci., 1911, i). 110. Type 

 locality: — Cuatotolapam, Canton of Acayucan, State of Vera Cruz, Mexico. 

 Types, Mus. Univ. Michigan, No. 41,704, 41,705, 1 d', 1 9. 



Type locality: — Mexico. Type seemingly lost from the Berlin Mus. 



