PBRISSOTBICCUS. 161 



small size. The bill is flattened, the width at the base being equal 

 to about half the length of the exposed culmen. The wing is 

 slightly rounded, the second to the fifth primary-quills longest 

 and the first nearly as long as the second. The tail is square at 

 the tip and about equal in length to that of the exposed culmen. 

 The tarsus is about equal to the tail (in P. ecaudata) in length, 

 and the hind toe and claw are about equal in length to the middle 

 toe and claw. Coloration: male and female similar. 



455. Perissotriccus ecaudatus miserabilis. 



Guiana Shokt-tailed Pygmy Tyrant. 



Todirostrum ecaudatum d'Orb. & Lafr. Syn. Av. i. p. 47, Mag. de Zool. 

 1837 (Yuracares, Bolivia). 



Orchilus ecaudatus Sclater, Cat. B. Brit. Mus. xiv. p. 89, 1888; Bra- 

 bourne & Chubb, B. S. Amer. i. p. 278, no. 2829, 1912. 



Perissotriccus ecaudatus miserabilis Chubb, Ann. & Mag. Nat. Hist, 

 (ser. 9) iv. p. 301, Oct. 1919. 



Adult. Back, wings, and tail yellowish green ; primary-coverts 

 uniform dark brown ; flight-quills blackish brown with green 

 margins on the outer webs and pale edges to the inner ones j tail- 

 feathers dark brown fringed with green ; head and sides of face 

 dark ash-grey ; the short feathers at the base of the bill and 

 surrounding the eye white ; throat and entire under surface 

 silky-white with a tinge of yellow on the flanks, edge of wing, 

 and under wing-coverts, and a wash of ash-grey on the sides of 

 the breast; under surface of quills and lower aspect of tail brown. 



Total length 58 mm., exposed culmen 8, wing 34, tail 12, 

 tarsus 13. 



The bird described was collected on the Bonasika River. 



Having compared the four examples of this bird in the 

 McConnell collection with a specimen in the British Museum 

 from Bolivia, which is the type-locality of P- ecaudatus (d'Orb. & 

 Lafr.), I find that they are darker green on the back, darker 

 grey on the crown of the head and face, and inclining to grey on 

 the under surface. It differs also in having the lower mandible 

 black and the feet much darker than the Bolivian bird. 



Breeding-season. Unknown. 



Nest. Unrecorded. 



Eggs. Undescribed. , 



VOL. II. M 



