188 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.87 



in the northern Andes; a very small one, femoralis, in Venezuela and 

 Brazil; and a larger one, fusco-coerulescens, in Argentina and Chile. 

 In specimens that I Lave examined birds from Venezuela are slightly 

 smaller than those from elsewhere, the wing in 5 males ranging from 

 226 to 237 and in 5 females from 245 to 262.5 mm. From Matto 

 Grosso 4 males measm'e 235 to 237 and 4 females 250 to 264 mm., 

 and from Bolivia 1 female 249 mm. From Argentina, a male from 

 the Territory of Formosa has the wing 239 mm., and a male from 

 the Territory of Chaco is 243 and a female 269. One female from 

 Salta is 251 ; from Tucumdn 4 males measure 235 to 259 and 1 female 

 269. Small birds extend down into Chubut as two males from Rio 

 Cliico and Valle del Lago Blanco have the wing 238 and 240 mm. 

 These smaller birds extend thus through the type locality of Falco 

 Jusco-coerulescens VieiUot so that they must bear this name with 

 Falco femoralis Temminck ^ as a synonym. It seems quite certain 

 that some of the larger birds that have been collected in northern 

 South America are migrant F. f. septentrionalis from North America. 

 Wliether these migrants extend to the far south and so account for 

 the larger individuals from Chile and Argentina remains to be estab- 

 lished. From Buenos Aires I have seen one female that measures 

 280, from Cliile a female with the wing of 285 mm. 



FALCO SPARVERIUS ISABELUNUS Swainson 



Falco isahellinus Swainson, Animals in menageries, 1837, p. 281 (Demerara, 

 British Guiana). 



On November 13, 1937, I collected a female 12 miles south of El 

 Sombrero, as in company with another it rested in a tree near the 

 road. On November 21 I observed two pairs 5 miles north of town 

 and was interested to note that in one instance one bu'd was dis- 

 tinctly white on the breast while the other was strongly rufescent. 

 The two rested only 2 or 3 feet apart so that comparison was easy. 



The female ta,ken is in the white-breasted phase, the gray of the 

 crown being pale with a fair-sized patch of browTi. It measures as 

 follows: Wing 180, tail 118, culmen from cere 12.4, tarsus 33.7 mm. 

 It seems to agree in characters best with the most eastern race of 

 northern South America. 



Family PHASIANIDAE 



COUNUS CRIST ATUS SONNINI (Temminck) 



Perdix Sonnini Temminck, Histoire naturelle g6n6rale des pigeons et dee galli- 

 naces, vol. 3, 1815, pp. 451, 737 (Cayenne). 



Quail are found about Mara cay, but I did not encounter them 

 until I came to El Sombrero. Here they were common in the scrub, 

 particularly near open ground but were so secretive that they were 



• Nouveau recueil de planches colori6es d'olseajix, 1822, pis. 121, 343 (Brazil). 



