AUGUST, 1915. NOTES ON SOUTH AMERICAN BIRDS CORY. 327 



ent being nearly or quite concealed by the closed wing), needs com- 

 parison with but three other forms; i.e., intermedia, andina, and perplexa. 

 From intermedia it differs in its much longer tail band, and difference 

 in white spotting of the outer webs of the second and third outer prima- 

 ries. From andina it may be distinguished by its smaller size; shorter 

 tail; much longer tail band and the absence of large white spots on the 

 outer webs of several of the outer primaries, and from perplexa by its 

 much larger size and more rufous (less chestnut) upper parts, especially 

 rump and upper surface of tail. It may be added, that the much darker 

 and very differently colored under parts will at once distinguish it from 

 isabellina and distincta. 



Specimens examined: Venezuela Colon (alt. about 2300 ft.), 

 Tachira, i tf, i 9 ; near Merida (alt. about 5300 ft.), 7 d", 29. 



Colombia Paramo" de Tama (alt. about 7000 ft.), near Venezuelan 

 line, i tf, i 9. 



Remarks: Three males have the crown plain, without rufous; two 

 show a slight trace of rufous; three show a small crown patch and one 

 (from ParamO de Tama) has a well marked rufous crown patch. One 

 specimen has a small white spot on the outer web of the second outer 

 primary; one shows a trace, and on the others the outer web of the 

 feather is plain. All of the males have from one to three small spots 

 or streaks on the outer web of the third outer primary, but they are 

 small, narrow, and inconspicuous. Males from Colon, Tachira, and 

 ParamO de Tama, have the tail band very wide, measuring about 33 

 mm. In the specimen from Merida it varies from 27 to 30, the majority 

 measuring 28 to 29 mm. The coloration of the inner web of the outer 

 rectrix is very variable. In three specimens it is black and white 

 without rufous; three specimens have it part white and part rufous, and 

 three have it rufous with one subterminal black band and white tip. 



Cerchneis sparveria perplexa subsp. nov. 



Emerillon de Cayenne, Buff., PI. Enl., I, 1770, pi. 444. 



Type from Lower Essequibo River, British Guiana. Adult male, 

 No. 47651, Field Museum of Natural History. From J. Rodway. 



Range: Extent of range unknown, probably low country from 

 British Guiana, eastward at least to Cayenne. 



Characters: Adult male. Size small; general under parts deeply 

 colored, approaching that of ochracea, but back more rufous chestnut; 

 rump and upper surface of tail distinctly tinged with chestnut; crown 

 plumbeous gray, somewhat more plumbeous than in isabellina; pri- 

 maries and secondaries tipped with whitish; inner web of outer rectrix 



