82 Field Museum of Natural History — Zoology, Vol. X. 



cardiform, about equal in both jaws; lower lip broad, papillose; top 

 of head smooth ; lateral keels very weak, completely united posteriorly ; 

 abdomen with 3 series of plates between the lateral ones; anal plate 

 in contact with 3 plates; dorsal fin high and pointed, its first ray 0.7 to 

 0.8 in head; pectoral spines reaching from about first fourth to first 

 half of ventral, .9 to 1.2 in head; width of body at first anal ray 5.0 to 

 5.8 in length of caudal peduncle; males with bristles on sides of head; 

 both lobes of caudal produced into long filaments. 



Color dark brownish, a dark band on each side from snout to caudal, 

 wider and better defined on sides of head and body, becoming faint 

 or disappearing on caudal portion of the body; top of head with a few 

 irregiilar dark streaks; under side yellowish, with darker median line 

 on caudal peduncle, and more or less mottled with darker laterally; 

 first 2 or 3 rays of dorsal fin black or marbled with black, rest of dorsal, 

 pectorals and ventrals with black spots, these usually present on anal 

 also; a black band on each lobe of the caudal. 



Pacific slope of eastern Panama. 



Oxyloricaria citurensis sp. nov. 



Type No. 7585, F. M. N. H.; length 194 mm.; Rio Cupe, Cituro, 

 Panama. 



Head 4.5 to 5.1; depth 8 to 10. o; D. I, 7; A. I, 5; scutes 16 or 17 

 + 13 or 14. 



Body elongate, moderately depressed; depth of head 2.3 to 2.5 in 

 its length, width 1.4 to 1.5; eye 6.8 to 8.3; interorbital 3.3 to 3.6; snout 

 rounded, its length 1.7 to 1.9 in head; teeth cardiform, about equal 

 in both jaws; lower lip broad, with papillae; top of head smooth, lateral 

 keels weak, completely united posteriorly; abdomen with 6 or 8 rows 

 of plates between the lateral ones; anal plate preceded by three plates; 

 dorsal fin high, pointed, its first ray 0.8 to i.o in head; pectoral spines 

 reaching about first fourth of ventrals, i.i to 1.2 in head; ventrals i.i to 

 1.2; width of body at first anal ray about 4.1 to 4.6 in caudal peduncle; 

 upper lobe of caudal produced; sides of head without bristles or with 

 very short ones. 



Color dark grayish brown, top of head and body with faint dark 

 spots, a few dark spots on dorsal, caudal and pectoral fins; under sur- 

 face light with yellowish tinge. 



Tuyra River basin. 



