AVES PODICIPEDID^E. 63 



criminated from the insular form as having a bill much shorter and more 

 slender.and with less fuscous color on the sides and flanks. 



In addition a race is described from Texas (based on No. 11. Coll. of 

 George B. Sennett, male, Lomita Ranch, Lower Rio Grande, Texas, 

 April 27, 1878. Collected by George B. Sennett), which is character- 

 ized as being similar to Colymbus dominions, but with shorter wings and 

 bill, and having less fuscous on the sides and flanks as well as being 

 whiter on the underparts. Through the kindness of the authorities in the 

 American Museum I have examined both of these types and conclude 

 that they present sufficient valid characteristics to discriminate them from 

 the insular form ; but inasmuch as I have been unable to examine speci- 

 mens from Patagonia, I must refer the bird from that region to Podicipes 

 dominicns, though it seems probable that it will be found to approach, if 

 not to be the same as, the Colymbus dominiciis brachypterus of Chapman- 



PODICIPES AMERICANUS Garnot. 



Podiceps americanns, Garn. Voy. Coq. Zool. I. p. 599 (1826: Chile); 



Gray, Gen. B. III. p. 633 (1846); Des Murs in Gay's Hist. Chil. 



Zool. I. p. 465 (1847) ; Schl. Mus. Pays-Bas, VI. Urinat. p. 42 (1867: 



Chile); Gray, Hand-List B. III. p. 95, no. 10769 (1871); Oust. Miss. 



Sci. Cap Horn, Oiseaux, p. 235 (1891). 

 Podiceps chiliensis, Garn. Voy. Coq. Zool. I. p. 60 1 (1826: Concepcion) ; 



Gray, Gen. B. III. p. 633 (1846). 

 Podiceps albicollis, Less. Traite d'Orn. p. 594 (1831); Puch. Mag. de 



Zool. 1851, p. 571. 

 Podiceps chilensis, Gould, Voy. 'Beagle,' Birds, p. 137 (1841: Buenos 



Ayres) ; Gay, Hist. Chil. Zool. I. p. 464 (1847) ; Reichenb. Syst. Av. 



Natatores, pi. 13. fig. 750 (1848); Scl. P. Z. S. 1867, p. 340; Gray, 



Hand-List B. III. p. 94, no. 10767 (1871). 

 Podiceps rollandi, Gould, (nee Quoy et Gaim.) Voy. 'Beagle,' Birds, p. 



137, part (1841: near Straits of Magellan and eastern coast of 



Chiloe); Eraser, P. Z. S. 1843, p. 119 (Chile); Gray, List B. part iii. 



p. 151 part (1844); Des Murs in Gay's Hist. Chil. Zool. I. p. 463 



(1847) ; Pelz. Reise Novara. Voy. p. 140 (1865: Chile) ; Scl. P. Z. S. 



1867, p. 340; Scl. & Salv. Ibis, 1868, p. 189 (Straits of Magellan); 



