JULY, 1907. FISHES OF GREAT LAKES, NICARAGUA MEEK. 105 



beach of Lake Managua near Momotomba. This species is certainly 

 not much different from L. tristoechus of Cuba and the Southern 

 States, and a comparison of specimens of each of similar size should 

 be made. I saw no specimens of this species in the markets, and do 

 not know whether or not it is ever used for food by the inhabitants of 

 the lake region. Specimens were taken in Lagoon Jenicero, at the 

 north end of Lake Nicaragua, and in a small lagoon south of Granada, 

 350 to 800 mm. 



Family Siluridse. 



Genus Khamclia Bleeker. B ACRES. 



Body elongate; head rather narrow; occipital process small or 

 wanting; adipose fin long, adnate to back for its entire length; bar- 

 bels 6 ; posterior nostril without a barbel. 



Three closely related species of this genus are known to occur 

 in the lakes. 



a. Body slender, depth about 6; maxillary barbels short, not 



reaching past middle of base of dorsal fin; in terorbital width, 

 3.3 to 3.4 in head. managuensis 105 



aa. Body robust, depth 4.1 to 4.6; maxillary barbels longer, reach- 

 ing nearly to or beyond origin of adipose dorsal. 



b. Interorbital width 3.1 to 3.4; maxillary barbels reaching 



nearly to or slightly past origin of adipose fin. 



nicaraguensis 106 



bb. Interorbital width 2.4 to 2.6; maxillary barbels reaching past 

 middle of adipose fin. barbata 106 



Rhamdia managuensis (Gunther). BAGRE; CHUCHIN. 



Pimelodus managuensis Gunther, Fishes Central Amer., 474, 

 1868, Lake Managua. 



Head 4.5 to 4.7; depth 5.9 to 6; D. 1-6; A. 12. Body long, 

 slender; head moderate, flattish, in terorbital width 3.3 to 3.4 in head; 

 snout 2.3 to 2.4 in head; diameter of eye 6 in head; upper jaw 

 the longer; gill rakers 3 + 10; maxillary barbels not reaching to or 

 slightly past origin of dorsal spine ; outer mandibulary barbels scarcely 

 reaching base of pectoral spine; dorsal spine weak, its length 3.1 to 

 3.6 in head; length of dorsal 1.7 to 1.8 in head, its height 1.6 to 1.7; 

 origin of dorsal to tip of snout 2.2 in length of body; adipose fin long, 

 rather low, its length 2.4 to 2.5 in length of body, its height 6.8 to 

 7.1 in head; distance from last dorsal ray to origin of adipose fin 



