LASIOPYGA 341 



quite an extensive distribution in the soutiiern part of the continent. 

 Dr. Cabrera (1. c.) has endeavored to separate De Lalande's animal 

 from Cuvier's species under the name of Cercopithecus pusillus Des- 

 mouHns, on the ground that L. pygerythra is a green animal and L. 

 pusillus a gray one. It is quite evident that Dr. Cabrera is not aware 

 of the great variability in shades of color that examples of L. 

 PYGERYTHR-\ exhibit, even, as I have already stated, from the same 

 locality. I have examined many specimens of this species from 

 numerous localities in southern Africa, and have been quite unable to 

 find any line of demarcation among them by which more than one 

 form could be recognized. We know what the L. pygerythra Cuvier 

 is, for the type is in the Paris Museum, but we only know Desmoulins' 

 and E. Geoffroy's species by their descriptions, the types having disap- 

 peared. The specimens named "lalandi" in the Paris Museum, and 

 which we have every reason to suppose were those recognized by the 

 earlier French writers as representing, at least, the animal described 

 as L. pusillus and L. lalandi, cannot be separated from Cuvier's 

 species. It would seem then to be most unwise to attempt to recognize 

 two species of this Guenon, for the evidence at present available is 

 against it. If the Paris specimens marked lalandi are really that form 

 then certainly they may not be separated from Cuvier's species. Un- 

 fortunately we cannot be absolutely sure that this is so and never will 

 be, for De Lalande's type has disappeared, but we are sure of L. 

 PYGERYTHRA, and as examples of this species exhibit a varied coloring, 

 and the different hues are not confined to examples from any especial 

 locality or range, any attempt to separate them into two distinct forms 

 would result only in increased confusion. My investigation of these 

 specimens does not permit me to accept Dr. Cabrera's conclusions. 



Lasiopyga RUFOviRiDis (I. Geoffroy) . 



Cercopithecus rtifoviridis I. Geoff., Archiv. Mus. Hist. Nat., Paris, 

 II, 1841, p. 504, pi. XXXII; Id. Compt. Rend., XV, 1842, p. 

 1038; Id. Cat. Primates, 1851, p. 23; Dahlb., Stud. Zool. Fam. 

 Reg. Anim. Natur., fasc. I, 1856, pp. 104, 108; Sclat., Proc. 

 Zool. Soc. Lond., 1860, p. 420 ; 1893, p. 258 ; Reichenb., Voll- 

 stand. Naturg. Affen, 1862, p. 113, fig. 281; Schleg., Mus. 

 Pays-Bas, Simise, 1876, p. 78; Forbes, Handb. Primates, II, 

 1894, p. 65 ; Matschie, Sitzungsb. Ges. Naturf . Freunde, Ber- 

 lin, 1895, p. 216; Pocock, Proc. Zool. Soc. Lond., II, 1907, p. 

 737. 



Cercopithecus Havidus Peters, Reis. Mossamb., Saugth., 1852, p. 



