ANNOTATED LIST OF THE SPECIES 361 
Caudal peduncle slender, not extremely compressed, its lowest elevation less 
than interorbital width, broadening at caudal basis. 
Light to dark brown above, underparts yellow, the iris bright yellow, the 
opercle sometimes brilliantly iridescent yellow; a green tint sometimes seen on 
upper parts. The Lake Arapa specimens are of bright saffron underneath, perhaps 
indicating a recent spawning period, since the ovaries had the empty appearance. 
The fins are dusky. 
Garman recognizes a variety of pentlandii from the Cuzco valley, 2 as large, 
much darker on the back, above the lateral line. This he names fuscus. We have 
no evidence of the species extending beyond the Titicaca basin; fuscus may be 
accounted for as a mislabeling of the locality, or possibly large specimens of O. 
milleri. 
Reported by Pentland under the colloquial name boguilla; in my experience 
it was always called boga, without the diminutive, unless for a small specimen. 
Garman learned the variant form bova. This, he believed, indicated a term of con- 
tempt, such as an hidalgo might have meant in speaking of common people as 
“cattle.” 
The species is wholly lacustrine in habit, unless there should be among our 
specimens unrecognized juveniles from streams. Garman reports it less abun- 
dant than O. cwvier?, Just the opposite of my experience. He considers it next to 
the Pygidium rivulatum of the lake as a table fish. 
Pellegrin’s stomach examinations of his 21 specimens of about 200 mm. showed 
little but plant tissues, with few molluscan fragments, and no complete shells. 
478. ORESTIAS LUTEUS Valenciennes 
Plate XVIII, figs. 1 and 2 
Orestias luteus Valenciennes, 1839, L’Inst., VII, 118; 
Cuvier and Valenciennes, 1846, Hist. Nat. Poiss., XVIII, 181; 
Garman, 1895, Mem. Mus. Comp. Zool., XIX, 154; 
Pellegrin, 1904, Bull. Soc. Zool. France, XXIX, 96; 
Starks, 1906, Proc. U. S. Nat. Mus., XXX, 781: 
Pellegrin, 1906, Poiss. Lacs Hauts Plat. Amér. Sud, 126, 127, 134, fig. 19iv; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 461; 
Evermann and Radcliffe, 1917, Bull. U. S. Nat. Mus., no. 95, 42; 
Rendahl, 1937, Ark. Zool. Stockholm, 29A11. 
Lake Titicaea and its basin 
16079, Moho bay, Allen, December, 1918. 
16080, Puno bay, Allen, November, 1918. 
16086, 46, 35-91 mm., bay of Huancané, Allen, December, 1918. 
16090, 6, 46-61 mm., same. 
16091, 39, 32-54 mm., same. 
16095, 16, 33-172 mm., Lago Umayo, Allen, January, 1919. 
16100, Guaqul, Lake Titicaca, Allen, December, 1918. 
16104, Yunguyo bay, Lake Titicaca, Allen, December, 1918. 
16105, same. 
16109, 2, 38-65 mm., Lake Arapa, Allen, Decemker, 1918. 
16110, Chupa, Lake Arapa, Allen, December, 1918. 
16123, Juliaca, Rio de Lampa, Allen, January, 1919. 
16127, Rio de Azdingaro, Azingaro, Allen, January, 1919. 
