EIGENMANN : NEW FISHES PROM WESTERN COLOMBIA 



7 



reaching- to or nearly to anal ; pectorals at least to ventrals, soniethnes 

 to end of axillary scales. 



Scales A'eiy regularly arranged ; a row ol" scales along base of anal 

 rays, candal naked, lateral line scarcely decurved. 



Dorsal tip dusky ; a small sub-circular spot at base of the middle 

 caudal rays; margin of upper caudal lobe dark; a submarginal dark band 

 from the caudal spot along- the upper margin of the lower caudal lobe ; a 

 narrow lateral band. 



Middle caudal ray of male covered with a thickened membrane, the 

 scales on the base of the lower middle rays enlarged, arching over a space 

 beneath them. 



Bryconamericus alpha Eigenniann. p.p. nov. 



5463a C. M. Type, 59 nnn. 54f;-l:a-c C. M. 13157 I. U. M. Paratypes, 6, 

 largest 64 mm. Villavicencio, Oriente, Colombia, Manuel Gonzales. 

 x\llied to B. caucanus differing among other things in the shorter max- 

 illary. 



Head 4+ ; depth 3; D. 10; A. 23/4, 24/1, 26/3, 27/1; scales 6-40-4 or 

 5; Eye 2.66 in head, a little greater than interorbital. 



Maxillary considerably less than the eye ; mandible with four or five 

 large teeth and smaller ones on the side; maxillary with 4/2, 3/4, 2/2 

 teeth where the denominator represents the number of specimens, the 

 enumerator the number of teeth. 



A vertical humeral spot, a lateral band continued as a dark band to the 

 end of the middle caudal rays. 



Bryconamericus beta Eigenmann, r.p. nov. 



5465a, C. M. Type 57 mm, 5466a-d C. M. 13158 I. U. M. Paratyioes nine, 

 largest 75 mm. Villavicencio, Manuel Gonzales. 



Head 4-4.25 ; depth, 2.65-2.8 ; D. usually 10, rarely 9 ; A. 25/1. 26/1. 

 27/3, 28/4; scales 5 or 6-36/2, 37/4, 38/1, 39/1-3 or 4 to ventrals. Eye 

 2.8-3, equal or a little less than the interorbital ; maxillary teeth 4/1, 

 3/2, 2/6. 



Base of upper caudal lobe scaled for a fourth, that of the lower for a 

 third of its length. 



Ventrals to or not quite to- the anal ; pectorals about to ventrals ; 

 sometimes falling a little short or extending a little beyond origin of 

 ventrals. 



Color much faded, lateral band to end of the middle rays. 

 This may be synonymous .with alpha. The present description may 

 serve to call attention till better material comes to hand. 



Bryconamericus scopiferus guaytarae Eigenmann and Renn, sp. nov. 



5474 C. M. Type, 76 mm, 13168 I. U. M., Paratype 83 mm. Patia at mouth of 

 Rio Guaytara. March 13-14, 1913. Henn. 



Five smaller specimens from the same place may belong to the same 

 variety. 



