EIGENMANN: the PYGIDIID^, a family of south AMERICAN CATFISHES. 317 



Sides and back with numerous irregular spots, larger in the larger specimens, 

 sometimes referable to distinct series. The spots are smaller in the specimens from 

 Santander. 



35. Pygidium nigromaculatum (Boulenger). (Plate XLIX, fig. 5.) 

 Trichomycterus nigromaculatus Boulenger, Ann. & Mag. Nat. Hist. (5), XIX, 



1887, p. 349 (Andes of Colombia). 

 Pygidium nigromaculatum Eigenmann & Eigenmann, Proc. Cal. Acad. Sci. (2), 



II, 1889, p. 52; Occasional Papers Cal. Acad. Sci., I, 1890, p. 336; Proc. U. S. 



Nat. Mus., XIV, 1891, p. 37; Eigenmann, Reports Princeton Univ. Exped. 



Patagonia, III, 1910, p. 400. 



Habitat. — Andes of Colombia, especially Sierra de Santa Marta and Santander. 

 No. ? , University of Michigan, two, 138 and 165 mm. Small stream, San 



Lorenzo, Santa Marta Mountains (4,500 ft.). Sept. 9, 1912. M. A. Carriker. 

 No. ? , University of Michigan, two, 118 and 150 mm. Same place, Jan. 



16, 1913. M. A. Carriker. 

 No. ? , University of Michigan, one, 73 mm. Same place, July 8, 1913. 



A. S. Pearse. 

 No. ? , University of Michigan, eight,-^ largest 55 mm. Same place, July 



9, 1913. A. S. Pearse. 



No. ? , one, 115 mm. Locality? 



13837, I. U. M.; 7447a-6, C. M., four, largest 93 mm. Quebrada de la Raya, 



Santander. Gonzales. 

 7448a-6, C. M., two, the larger 45 mm. Quebrada Capitanejo, Santander. Gon- 

 zales. 

 7449a-c, C. M.; 13838, I. U. M., six, largest 68 mm. Quebrada de Cobarachior, 



Santander. Gonzales. 



Description of the Species from San Lorenzo. 



The characters given by Boulenger are in brackets. 



Head 5.24-5.75 [6.5 in total]; D. 11.5 or 12.5; A. 9.5; P. 9; eye in middle of 

 the head ; interocular 3 in the length of the head ; width of head equal to its length 

 [longer than the distance between snout and a line connecting the tips of the two 

 bunches of opercular spines]; teeth conical [pointed, recurved]. 



Nasal barbels extending to the tips of the opercular spines or to the base of the 



" These specimens are so distorted that it is difficult to refer them to their proper place. The 

 origin of the dorsal seems to be equidistant from the tip of the caudal ant! the front of the eye. There 

 are traces of longitudinal bands. 



