AUGUST, 1915. NOTES ON SOUTH AMERICAN BIRDS CORY. 331 



Male: Wing, 182 ; tail, 130; tarsus, 33 mm. Measurements of seven 

 males: Wing, 174 to 183, average 179; tail, 127 to 131, average 129; 

 tail band, 24 to 28, average about 26 mm. 



Female: Wing, 178 to 185, average 183; tail, 131 mm. 



Distinguishing characters: Differs from C. s. isabellina* in the 

 paler (more ashy gray) crown; average longer wings and tail, and much 

 more white on inner webs of primaries. It is separated from C. s. 

 margaritensis by its decidedly paler under parts; paler crown; more white 

 on inner webs of primaries; difference in color of inner webs of outer 

 rectrices, and somewhat longer wings and tail. It may be distinguished 

 at a glance from C. s. ochracea by its paler under parts, and much nar- 

 rower tail band; from C. s. australis by its unspotted under parts and 

 other characters. 



Specimens examined: Brazil Boa Vista, Rio Branco, Amazonas, 

 5 <?, i 9 ; Base of Serra da Lua Mts., near Boa Vista, 2 <?, i 9 . 



Remarks: Four of the males have the crown plain; three show a 

 trace of rufous; one female has the plain, gray crown, the others show a 

 trace of rufous; all of the males have the inner web of the outer rectrix 

 rufous, with one subterminal black band and the tip white. 



Cerchneis sparveria margaritensis Cory. 



Cerchneis sparverius margaritensis Cory, Field Mus. Nat. Hist. 

 Pub., Ornith. Series, I, No. 8, 1915, p. 297. 



Type locality: Margarita Island, off Venezuela. 



Range: Margarita Island (and possibly northeastern Venezuela). 



Characters: Breast and more or less of abdomen ochraceous cinna- 

 mon (much paler than in ochracea or perplexa, but decidedly darker 

 than in distincta or isabellina) , becoming much paler on lower abdomen 

 and flanks; under parts without black spots, or with a few on the sides 

 which are concealed when the wing is closed; back vinaceous cinnamon 

 rufous, approaching in color that of C. s. brevipennis; inner web of outer 

 rectrix dull white, with several black bands; crown approaching deep 

 neutral gray (Ridgway), but slightly paler; outer web of second (outer) 

 primary with two white spots of medium size; the third with three 

 white spots sometimes nearly confluent in the form of a narrow streak. 



Male: Wing, 170 to 177, average 175; tail, 120 to 129, average 

 125; tail band, 23 to 28, average about 26 mm. 



Female: Wing, 178 to 184, average 181; tail, 129 to 131 mm. 



* Judging from the single specimen of C. s. isabellina from British Guiana seen 

 by me, whether or not these differences are constant can only be determined by com- 

 parison with a good series from that region. 



