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the Huambo bird. Bat again, the adult male from Mapoto and the Bogotd skin 

 are absolutely indistinguishable from the Peruvian skin, having the head very dark 

 slate-grey, the back dull olive green, the anterior ear-coverts whitish, and the 

 breast strongly olivaceous. 



From the above, it will be seen that though there is a certain individual variation, 

 the colour differences are not peculiar to any geographic area. Therefore, we can 

 admit only one form, P. ophthalmicus, ranging from Central Peru (Amable Maria, 

 Ropaybamba, La Gloria) through Ecuador to Western Colombia (Canca Valley) 

 and North-western Venezuela (Cumbre de Valencia). 



01. Tyrannus fumigatus Lafr. & D'Orb. should be Myiochanes famigatus 

 fumigatus (Lafr. & D'Orb.) 



Tyrannus fumigatus Lafresnaye & D'Orbigny, Syn. Av. i. in Mag. Zool. 1837, cl. ii. p. 43, 



(1837.— Yungas in Bolivia). 

 Contopus ardfsiacus {nee Lafresnaye 184i) Sclater & Salvin, P.Z. S. 1879, p. 015 (Tilotilo, Yungas, 



Bolivia) ; Sclater, Cat. B. Brit. Mus. xiv. 1888, p. 237 (part., l,m, Tilotilo, Bolivia). 



No. 1. Mus. d'Hist. Nat. Paris. Skin, labelled: " D. 261, Bolivia. No. 175. 

 D'Orbigny, 1834. Tyrannus fumigatus Nob." — Wing 93; tail 78J ; bill 16 mm. 

 Type of species. 



No. 2. Mus. V. Berlepsch, " ? " ad. S. Antonio, 



Yungas, Bolivia, July 5, 1895, G. Garlepp 



coll.. No. 1103 Wing 92 ; tail 70J ; bill 16 mm. 



No. 3. Mus. Berlepsch, "?" ad. S. Antonio, 



August 7, 1895, No. 1189 . . . . Wing 90 ; tail 80 ; bill 10 mm. 

 No. 4. Mus. Berlepsch, "?" ad. S. Antonio, 



August 31, 1895, No. 1253 . . . Wing 90 ; tail 70 ; bill 15| mm. 



No. 5. Mus. Berlepsch, " ? " ad. Songo, west- 

 ern Yungas, Bolivia, June 30, 1896, 



No. 2347 Wing 91 ; tail 78; bill 16J mm. 



No. 6. Mus. d'Hist. Nat. Paris, adult. Tilotilo, 



Bolivia. Buckley coll., Boucard collection Wing 92 ; tail 79 ; bill lOJ mm. 



The type of Tyrannus Jumigat as Lafr. & D'Orb. which has never been identified, 

 proves, on examination, to be an e.xamj)le of the sjiecies universally called Contopus 

 ardosiacus (Lafr.). There are four sjiecimens from the same country in the 

 Berlepsch Museum, while the French National Collection possesses an unsexed 

 adnit bird obtained at Tilotilo, Bolivia, by the late Clarence Buckley. On com- 

 ])ariug the si-x Bolivian skins with a considerable series from North Peru (Tambillo), 

 ^Vestern Ecuador, (JoJoinbia (Bogotdj and Western Venezuela (Andes of Blerida), 

 I find several well-marked differences which warrant the recognition of a darker, 

 northern form, Myiochanes fumigatus ardosiacus (Lafr.). The Bolivian birds arc 

 altogether paler and lighter in coloration : the back is clear sooty grey with an 

 olivaceous tinge, the sooty blackish crown forming a rather well-defined dusky cap ; 

 the under parts arc lighter olivaceous grey, with the throat and middle of the belly 

 decidedly whitish. These characters are strongly pronounced in the fresh plumage 

 (No«. 1 — 5) ; the Tilotilo bird (No. 6) — in very worn, abraded condition — is scarcely 

 lighter above than Bogota skins in corresponding stage, but the much paler 



