EIGENMANN: the PYGIDIID^, a family of south AMERICAN CATFISHES. 313 



base of middle caudal rays than to tip of pectorals, their tips reaching the anal; 

 origin of anal under fourth dorsal ray (second fully developed ray), the distance 

 between the base of its last ray and the base of the middle caudal rays six times in 

 the length; caudal rounded; origin of dorsal over tip of ventrals, its distance from 

 the base of the middle caudal rays two and two-fifths times in its distance from the 



snout. 



Sides and back densely covered with spots about the size of the eye. 



30. Pygidium stramineum Eigenmann. (Plate XLIX, fig. 1.) 

 Pygidium stramineum Eigenmann, Proc. Am. Philos. Soc, LVI, Jan., 1918, p. G94. 

 7101, C. M., type; 13818, I. U. M., paratype, 46 and 50 mm. Quebrada del 



Mango, Santandcr. Gonzales. 

 7089a, C. M., paratype, 35 mm. Quebrada del Maradat (?) Santander. Gonzales. 

 7090a-c, C. M., 13804, I. U. M., paratypes, seven, largest 45 mm. Quebrada da 



Densino, Santander. Gonzales. 

 7102o-/i, C. M.; 13819, I. U. M., fifteen, largest 60 mm. Quebrada Deocamante, 



Santander. Gonzales. 

 7103a-6, C. M.; 13826, I. U. M., four, the largest 67 mm. Quebrada de Zuarta, 



Santander. Gonzales-. 

 7104, C. M., one, 41 mm. Quebrada de La Honda, Santander. Gonzales. 



Head 4.5-5.33; D. 10.5; A. 8.5-9.5; P. 9; posterior margin of eye in the middle 

 of the head; interorbital three in the length of the head; teeth bristle-like, in about 



three series. 



Nasal barbels reaching base of opercular spines or beyond origin of pectorals, 

 maxillary barbels to tip of opercular spines or axil; pectoral filament about equal to 

 the length of the head, the rays equal to the length of the head without the snout; 

 origin of ventrals equidistant from the base of the middle caudal rays and a point 

 between the axil and a Uttle in front of the opercle (and the tips of the opercular 

 spines in the type), tips of the ventrals slightly behind the vent; origin of the anal 

 behind the vertical from the base of the last dorsal ray or under the posterior half 

 of the dorsal, the distance between the base of the last anal ray and the middle 

 caudal rays 4.5^5 in the length, accessory caudal rays very large and numerous; 

 caudal rounded, six and a half times in the length; origin of dorsal over the origin 

 of the ventrals, or but slightly behind this point, always nearer the eye than the tip 

 of the caudal, sometimes equidistant from tip of snout and tip of caudal, its dis- 

 tance from the base of the middle caudal rays one and a half or less in its distance 

 from the snout. 



Uniform straw-colored in alcohol. 



