sor'iMi \Aii:ivM('.\\ I'MsiiKS 



41 



V GEPHYROCHARAX Eig nm 1 1 i 



Kvji to flic Six'cics (jj ( 1< iirochd ni.r 

 a. Candal with a black si)ot at its hasp. 



h. Tips of pectorals and helly, in llic males, withont hlaclv ; no dark 

 spot at base of first dorsal ray ; males like the females except in the 

 caudal; distance between origin of dorsal and base of middle caudal rays 

 2:5-2.8 in the length. Depth 3-3.25. 7. choccensis Eigenrrann. 



bb. Tips of pectorals in the males without black ; belly from anal to 

 the ventrals black ; a dark median streak from ventrals to pectoral ; dis- 

 tance between middle of caudal and origin of dorsal about 2.8 in the length ; 

 depth 4. 8. caucanus Eigenmann. 



bbb. Tips of pectorals in the males black, a dark spot at base of first 

 dorsal ray; distance between origin of dorsal and base of middle caudal 

 rays about 2.(3 in the length; depth 3-3.3. 0. melanocheir Eigenmann. 



aa. Base of caudal with a black bar which extends part way along the 

 middle caudal rays and further on the outer rays. 



10. atricaudata Meek and Hildebrand. 



7. Gephyrocharax chocoensis Eigenmann. 



GepJujrochara.r cJiococnsis Eigenmann, Indiana University Studies, 10, 1913, 

 p. 23. 



Habitat : liio San Juan basin. Pacific slope of Colombia, and Atrato basin. 

 Atlantic slope of Colombia. 



8. Gephyrocharax caucanus Eigenmann. 



Gephi/rocharar caitr-aiiiis Eigenmann, Indiana University Studies. 10, 1913, 

 p. 24. 



Habitat: Upper Cauca basin, Colombia. 



9. Gephyrocharax melanocheir Eigenmann. 



Gepliyrocliarax )nelanochcir Eigenmann, Indiana University Studies, 1(5, 

 1913. p. 24. 



Habita.t : Magdalena basin from the coast to Honda. 



10. Gephyrocharax atricaudata (Meek & Hildebrand.) 



Dcuterodoii atricaudata Meek and Hildebrand, Field Museum Publications. 



158, p. 08. 

 Habitat : Panama Canal Zone. 



^VI. MICROBRYCON Eigenmann & Wilson. 

 11. Microbrycon minutus Eigenmann & Wilson. 



Microl)i-yco)i iiiiuutiis Eigenmann, Indiana University Studies, 19, 1914. 

 p. 3. 



Habitat : Truando, tributarv of the Atrato, Colombia. 



