NORTHWESTERN SOUTH AMERICA. 



679 



Everywhere covered with round spots, a double row of about 

 twelve on the anterior dorsal membranes, about five series on the 

 last, fewer rows in the smaller ; about twelve series of spots on the 

 caudal ; in all but one the outer caudal rays spotted. 



6. Pseudancistrus pediculatus spec. nov. 



The following specimens were collected by Manuel Gonzales on 

 the eastern slope of the Andes between Bogota and the Rio Meta. 



Specimens Examined. 



Catalo,8: Number. 



Number of 

 Specimens. 



Length in Mm. 



Locality. 



13664 I., 7348 C, paratype and 

 type 



13927 I., 7586 C, paratypes . . . 



13928 and 13663 I., paratypes. . 



13929 I., paratypes 



13932 I., 7587 C, paratypes . . 



60 and 118 

 largest 95 

 largest 120 



largest 103 

 largest 95 



Rio Negro, Villavicencio. 

 Villavicencio. 

 Quebrada Cramalote, 



Villavicencio. 

 Barrigona, Rio Meta. 

 Tengavita. 



Head 2.7-3 ; depth 6.5-7 ; D. I, 7 in five, I, 8 in forty-six, I, 9 in 

 two; A. I, 4; scutes usually 25, rarely 24 or 26; eye about 6 in 

 snout, 10 in head, a little over 3 in the interorbital ; ramus of lower 

 jaw about equal to the interorbital ; interopercle with two principal 

 spines, the longer .6 of the head, extending much beyond the head ; 

 sometimes 4 or 5 graduated spines follow each other, besides these 

 there is with age, an increasing number of smaller spines about the 

 edge or below the hispid portion of the interopercle ; snout with 

 many bristles in the male, short spines from the eyes forward, 

 around the nares and forward along the middle to the snout ; dorsal 

 spine equal to the snout or shorter, the last ray reaching the adipose 

 spine or the second scute in front of it ; caudal very obliquely emar- 

 ginate, the lower ray 3.33 in the length ; pectoral reaching tip or 

 middle of ventrals. 



Back and sides with faint spots ; dorsal and caudal with numer- 

 ous spots on the rays, more rarely uniform ; ventrals and pectorals 

 more faintly spotted. 



