1534 Bulletin 47 ^ United States A^ational l\Tusc2(m. 



third crossbaiid terminating in a large black lateral spot ; sides of head 

 with several bluish dots, and with a blackish spot on opercnlnm and 

 suboperculuin, darkest on latter bone; fins light colored, immaculate. 

 Length 5 inchi'S. Guatemala. (Giinther. ) (a«re?*s, golden.) 



Heros aureus, Gunthee, Cat. Fishes, iv, 292, 1862, Rio Motagua and at Yzabal, Guate- 

 mala (Coll. Salvin & Godman) ; GOnther, Fisli. Centr. Am., 45.5, pi. 73, fig. 2, 1869. 



1936. HEROS CITEINELLIIS, Giinther. 



Head 2|; depth 2t. D. XVI or XVII, 12; A. VII, 8 or 9; scales 6-30-13. 

 Head as high as long ; snout rather elevated, not obtuse ; cleft of mouth 

 almost horizontal; lower jaw scarcely prominent; teeth in narrow bands, 

 those of outer series enlarged, with brown tips; maxillary not reaching 

 vertical from front margin of eye; preorbital wider than orbit; eye close 

 to upper profile, and a little nearer to end of snout than to opercular mar- 

 gin, its diameter ^ length of head; iuterobital space dattish, twice width 

 of orbit; opercles scaly, the scales larger than those on cheeks; suboper- 

 culum with 2 series of scales. Soft anal and dorsal fins slightly scaly at 

 base; points of soft dorsal and anal considerably produced, and extending 

 beyond middle of caudal fin, sometimes to its extremity; first dorsal spine 

 inserted above upper end of gill opening; dorsal and anal spines slender, 

 the eighth or tenth of dorsal fin f length of head; pectoral nearly as long 

 as head, long and rounded, and extending to fifth anal spine; outer ven- 

 tral ray produced ; caudal rounded, its length 4| times in total ; distance 

 between vent and root of ventral nearly ^ length of head. Scales on 

 cheek in 4 series ; fold of lower lip continuous in middle ; free portion of 

 tail conspicuously deeper than long; nape very convex; interorbital space 

 broad, its width | length of head. Lemon colored, either nearly uniform 

 or with the back black, which color sometimes forms irregular blotches 

 on vertical fins. Length 8 iuches. Lake Nicaragua. (Giinther.) {citri- 

 nellus, lemon colored.) 



Jleros citrinellvs, GitNTHER, Proc. Zool. Soc. Lond. 1864, 153, Lake Nicaragua (Coll. Capt. 

 Dow) ; GiJNTHER, Fish. Centr. Am., 458, pi. 71, fig. 1, 1869. 



1937. HEROS MOTAGUENSIS, Giinther. 



Head 2g ; depth .S. D. X VIII, 10; A. VII, 8 or 9; scales 5-32-13. Head 

 longer than high ; snout of moderate extent, much longer than eye, pointed ; 

 cleft of mouth very oblique, lower jaw very prominent; maxillary reach- 

 ing nearly to vertical from anterior margin of orbit; width of orbit not 

 quite ^ length of head, and less than width of interorldtal space; pre- 

 orbital with antero-inferior margin but slightly concave, its greatest 

 width equal to that of orbit ; dentition as in //. dovii; eye near upper 

 profile of head, nearer to end of snout than to that of operculum ; opercles 

 scaly; suboperculum with 2 series of scales; A^ertical fins scaly at base, 

 their points not reaching middle of caudal; caudal rounded; distance 

 between dorsal and caudal somewhat less than depth of free portion of 

 tail; first dorsal spine inserted behind vertical from upper end of gill 

 opening; dorsal and anal spines short, length of twelfth dorsal spine § 



