AUGUST, 1915. NOTES ON SOUTH AMERICAN BIRDS CORY. 315 



DISTINGUISHING CHARACTERS AND SUPPOSED DISTRIBUTION OF SUB- 

 SPECIES OF Cerchneis sparveria (LiNN.) IN SOUTH AMERICA 

 AND ADJACENT ISLANDS 



Cerchneis sparveria cinnamomina (Swains.). 



Falco cinnamomina Swains., Anim. in Menag., I, 1837, p. 281. 



Type locality: "Chile." 



Range: Chile, northwestern, western and southern Argentina to 

 Patagonia and Straits of Magellan, northward to southern Peru and 

 Paraguay; intergrading with australis in northeastern Argentina, Para- 

 guay, and Rio Grande do Sul, Brazil, and with peruviana in southern 

 Peru. 



Characters: Male. Size large; tips of rectrices with more or less 

 rufous, usually rufous or rufous and white; central rectrices often 

 entirely tipped with rufous, but usually with rufous and gray; sub- 

 terminal black band short (from 9 to 16, averaging about 13), decidedly 

 narrower than in australis or peruviana; inner web of outer rectrix 

 normally rufous, usually with one subterminal black band and a white 

 or white and rufous tip; breast tinged with pale ochraceous rufous 

 (averaging nearly as pale as in australis); under parts whitish, with 

 more or less numerous rounded black spots; exposed white spots on 

 outer webs of outer primaries restricted to 2 or 3 small narrow marks 

 near the shaft on the third and occasionally showing a trace of one on 

 the second. 



Wing, 187 to 199, average 193; tail, 129 to 143, average 134 mm. 



Female. Similar to australis, but averaging larger; black bars on 

 rectrices narrower and less complete and subterminal band nar- 

 rower; outer rectrix occasionally immaculate. 



Wing, 195 to 208, average 198; tail, 132 to 144, average 137 mm. 



Comparative differences: Male differs from australis (from Bahia 

 and Matto Grosso) in averaging considerably larger and in difference 

 in normal coloration of the rectrices (australis usually has no rufous 

 on the outer rectrix, the tips of most of the rectrices white, and rarely 

 showing any rufous) ; subterminal black bands on the rectrices narrower, 

 and under parts usually not quite so pale. Female differs from australis 

 in average larger size; black bars on tail narrower and less complete; 

 subterminal band narrower; outer rectrix with black marking usually 

 smaller and more often immaculate. Male of cinnamomina differs 

 from peruviana by its larger size, more whitish and more heavily spotted 

 under parts; breast paler (less tinged with ochraceous rufous); sides 

 and flanks whitish (not noticeably tinged with ochraceous buff as in 

 peruviana); subterminal band on tail shorter. 



