REVIEW OF THE ERYTHRININ^. 113 



only, and sometimes entirely wanting. The sides of the 

 head and snout are always plain. The dorsal spot varies in 

 size and intensity of color; the middle caudal rays have 

 three faint dusky cross-bars; the middle of the last anal 

 ray is usually milky white, the white being bordered above 

 and below by dusky areas; tips of the outer ventral rays 

 usually milky white. 



Fins always low, the ventrals not nearly reaching the vent. 



9. Pyrrhulina argyrops. 



Pi/rrhulina argyrops Cope '78a, 694 (Peruvian Amazon). 

 Habitat: Marailou. 



This species is known only from the types; it may be distinguished 

 by the relative position of its dorsal. 



IV. Lebiasina. 



Lehiasina C. & V. xix, '46, 531 (bimacidata) . 

 Type: Lehiasina bimacidata C . <fcV. 



The single species of this genus is found in the western 

 streams of Peru and Ecuador. 



1. Lebiasina bimaculata. 



Lehiasina bimaculata G. & V, xix, '46.531, pi. 587 (Remac, near Lima); 



Gthr. '64, 286 (Bay of Callao; Western Andes of Ecuador) : Steind. 



'79a, 22 (Rio Remac, near Callao and Lima; Rio Jurumilla; Pasca- 



mayo). 

 Habitat: Western slopes of Peru and Ecuador; Callao Bay. 



Sixty-two specimens, .05-. 19 m. Kio Remac, near Callao 

 and Lima. 



In the general shape this species resembles the species 

 of 3Iacrodo)i and Erythrinus. Sides with a faint band; a 

 conspicuous black spot at base of middle caudal rays; a 

 fainter one behind tlie head. 



D. 10; A. 11. Lat. 1. 25. 



V. Stevaedia. 



Stevardia Gill, '58a, 63 (albipinnis) . 



Corijnojwma Gill, '58a, 65 (riisei); Gthr., '64,287 (sp.). 



2d Ser.. Vol. II. [ 9 ] November 8, 1889. 



