NO. I MIRANDOLLES FOREST FALCON FRIEDMANN 3 



Brazil (Rio Jurua, Villa Braga, Santarem, Tapajoz River, Beireio, 

 Rio Majary, Rio Acora, Rio Jamunda, Sao Gabriel, Igarapa Aniba, 

 Piquiatuba, Manacapuru, and Allianca, Para), southeast to Espirito 

 Santo (Rio Doce), and northeast to British Guiana (Carimang River, 

 Ituribisi River, Courantyne, Bartica, Arawai River), Dutch Guiana, 

 and French Guiana (Cayenne), and south to eastern Peru (Chy- 

 avetas, Yurimaguas) and to Bolivia (Santa Ana, near La Paz, on 

 the Rio Corioco). 



The nominate race averages larger than the northern form as the 

 following measurements shovi^, but the overlap is too great for size 

 to be used as a diagnostic character. 



Micrastur mirandollei mirandollei: ii males (including 5 from the 

 literature), wing 220-241 (230.5) ; tail 179-202 (189.1) ; culmen from 

 cere 20-23 (20.8) ; tarsus 70-76.2 (75.5) ; middle toe without claw 

 35-7-37-2 (36.7 mm.) ; 7 females, wing 221-248 (233.0) ; tail 180-208 

 (190.7) ; culmen from cere 19.9-22.4 (20.9) ; tarsus 73-86 (77.9) ; 

 middle toe without claw 34.2-38.8 (36.2 mm.). In this connection 

 it may be mentioned that Hellmayr (Nov. Zool., vol. 17, p. 409, 1910) 

 gives the measurements of an old adult female from Allianca, Brazil, 

 as wing 265, tail 200, culmen 24, and tarsus 55 mm. The wing is much 

 longer and the tarsus much shorter than in any birds I have examined. 



Micrastur mirandollei extimus: 7 males, wing 215-237 (221.3) J 

 tail 182-200 (191. 5) ; culmen from cere 20-23.3 (21) ; tarsus 74.1-81 

 (77.6) ; middle toe without claw 32.5-38 (35.1 mm.) ; 7 females, wing 

 220-228 (224.3); tail 187-195 (191); culmen from cere 20.2-22.4 

 (21.4) ; tarsus 78-84 (80.1) ; middle toe without claw 35.1-38 (36.1 

 mm.). 



It appears from these figures that this is one of the relatively few 

 hawks in which there is little or no difference in size between the 

 sexes. A detailed description of its plumages, given below, completes 

 our present knowledge of this rare forest falcon. 



Micrastur mirandollei mirandollei: Adult (sexes alike in colora- 

 tion) : Forehead, crown, occiput, nape, scapulars, interscapulars, back, 

 rump, upper tail coverts, upper wing coverts, and remiges deep neu- 

 tral gray with a slate tinge, the top of head somewhat darker; the 

 inner webs of the remiges white for their basal two-thirds or more, and 

 crossed by four fairly broad dark mouse-gray bands and somewhat 

 mottled with deep mouse gray on the more distal portion of the whitish 

 area; the fifth (from the outside) primary the longest, the first 

 (outermost) the shortest; tail chaetura black tipped with white or 

 buffy white and crossed by three fairly broad grayish-brown bands, 

 these bands becoming whitish on the inner webs of the lateral 



