BIRDS OF NORTH AND MIDDLE AMERICA. 



445 



Young. — Essentially like adults, but without oran<i:e on crown, and 

 with rectrices, all the reniiges, primary coverts, and middle and 

 greater coveFts edged with cinnamon. 



AdyU ?waZe.— Length (skins), 150-180 (161); wing, 80-92.5 (87.8); 

 tail, 61.5-77.5 (70); exposed culmen, 13-15 (13.9); tarsus, 17.5-21 

 (18.5); middle toe, 11.5-14.5 (12.5).« 



Adult female.— hens:i\\ (skins), 141-187 (154); wing, 80.5-90 

 (84.1); tail, 61.5-76 (67.8); exposed culmen, 12.5-15 (13.8); tarsus, 

 17.5-19 (18.4); middle toe, 11.5-13.5 (12.1).^ 



Panama (Loma del Leon; Paraiso Station; Panama City) and 

 southward through Colombia, Venezuela, Trinidad, British Guiana, 

 Surinam, Cayenne, Ecuador, eastern Peru (Nauta) and entire Amazon 

 Valley to Bolivia (Rio Blanco and Rio Itonama, Province of Moxos) 

 and southwestern Brazil (Chapada, Mattogrosso). 



[Muscicapa] cmjancnsis Linn^us, Syst. Nat., ed. 12, i, 17GG, 327 (based on Musci- 



capa cayanc7isis Brisson, Orn., ii, 404, pi. 38, fig. 4). — Gmelin, Syst. Nat., i, 



pt. ii, 1788, 937. 

 Elxnea cayanensis Cabanis, in Schomburgk's Reis. Brit, (luiana, iii, 1848, 701. 

 M[yiobius] cayanensis Gray, Gen. Birds, i, 1846, 249. 

 [Elainia] cayanensis Gray, Hand-list, i, 1869, 353, no. 5352. 

 Myiozetetcs cayanensis Hellmayr, Novit. ZooL, xii, Sept., 1905, 293 (Para, Brazil; 



crit.). 

 Tyrannus cayennensis Temminck, Tabl. Meth. (in PL Col., i), 1836?, 24. 

 M[iiscipeta] cayennensis D'Orbigny and Lafresnaye, Mag. de ZooL, 1837 



(Synopsis Avium, p. 47) (Mojos, Bolivia). 

 Muscipeta cayennensis D'Orbigny, Voy. Amer. Merid., Ois., 1839, 317 (Rio Blanco 



and Rio Itonama, prov. Mojos, Bolivia). 

 [Tyrannula] cayennensis Bonaparte, Consp. Av., i, 1850, 190. 

 Elsenia cayennensis Sclater, Proc. ZooL Soc. Lond., 1858, 458 (Gualaquiza and 



Zamora, w. Ecuador). 



o Twelve specimens. 

 b Ten specimens. 



Locality. 



Wing. 



Ex- 

 posed 

 culmen. 



Middle 

 toe. 



MALES. 



Four adult males from Panama 



Three adult males from Colomliia 



Three adult males from Venezuela 



Two adult males from s. w. Brazil (Mattogrosso) 



FEMALE.S. 



Seven adult females from Panama 



Two adult females from Venezuela 



One adult female from s. w. Brazil (Mattogrosso) 



88.3 

 85 

 88 

 90.8 



82.9 

 85.8 

 90 



71.1 

 67 

 (i9 

 7(i 3 



66. 4 

 68.5 

 76 



14 

 13 



14.2 

 14.5 



13.7 



14 



14.5 



18.5 

 18 



18.2 

 20 



18.5 



18 



18.5 



12.5 

 12.2 

 12.2 

 13.8 



12 

 12 

 13. 5 



I can not see that the specimens from southern Brazil (Chapada and Cuyaba, Matto- 

 grosso) differ from others except in larger size. 



The South American representatives of this species require careful revision. 



