( 406 ) 



This is an immature bird of M. concentricus — as defined by Mr. Ridgway — with 

 the outer and inner toe of equal length, and agrees in coloration with specimens, in 

 corresponding plumage, from Pozuzo (Pern), Para and Cayenne. When lately 

 in Paris, I examined the types of S. gilvicollis Vieill. (locality unknown) and Nisus 

 concentricus Less. (Cayenne — Poiteau coll.), and found them both to belong to the 

 same species. The correct name of this bird is, therefore, M. gilvicollis. 



171. Rupornis magnirostris magnirostris (6m.). 



Cf. supra, p. 38. 



Astur macrorhynchus Pelzeln, Zur Ornith. Bras. i. 1807. p. ("> (Borba). 



Nos. 995, 128U. S ad., ? jr., Humaytha, 20. vii., 21. ix. 06. " Iris and feet 

 yellow, bill black." 



In coloration like specimens from British Guiana, Surinam, etc., bnt somewhat 

 larger. 



172. Busarellus nigricollis (Lath.). 



Cf. supra, p. 38. 



No. 1300. Adult (not sexed), Humaytha, 28. ix. 06. "Iris dark brown, feet 

 greyish white, bill black." 



173. Leucopternis schistacea (Snndev.). 



Asturina schistacea Sundevall, Oefo. Ic. Vet. Ahad. Fiirh. 1849. p. 132* 



Uruoilinga schistacea Sclater, Tram. Zool. Hoc. Load. iv. 18G2. p. 261. tab. 58 (Rio Javarri • interior 

 of Bolivia) ; Pelzeln, Zur Ornith. Bras. i. 1807. p. 2 (Borba). 



No. 1078. ? ad., Humaytha, 12. viii. 06. " Iris and feet yellowish red, bill 

 black, cere yellowish red." — Wing 285 ; tail 192 mm. 



No. 1032. c? imm., Humaytha, 1. viii. 06. " Iris and feet yellow, bill black, 

 cere yellow." — Wing 265; tail 180 mm. 



No. 1032 differs from the adult bird in having the axillaries, under win°-- 

 coverts and the edge of the wing banded with blackish and white, the thighs closely 

 barred with plumbeous and white, and the under tail-coverts white at the base. 

 The tail-feathers have two white cross-lines (besides the apical margin, which, 

 however, is worn off in our specimen) and the base of the inner webs also white. 



174. Ictinia plumbea. 

 Falco plumbeus Gmeliu, Syst. Nal. 1. i. p. 283 (1788— ex Latham : Cayenne). 



No. 1126. cf ad., Humaytha, 12. ix. 06. "Iris pale brown, feet yellow, bill 



black." 



175. Pulsatrix perspicillata (Lath.). 



Strix perspicillata Latham, Ind. Ornith. i. p. 58 (1790. — Cayana — ex "Spectacle Owl," Latham, 



Gen. Sy?i. Birds Suppl. p. 50. tab. cvii. = av. juvenis !). 

 Athene torquata Pelzeln, Zur Ornith. Bras. i. 1867. p. 8 (Borba). 



No. 946. $ ad., Humaytha, 17. vii. 06. "Lis yellow, feet grey, bill greyish 

 yellow."— "Wing 320 ; tail 200 mm. 



Agreeing with specimens from Gniana, Surinam, etc. 



P. pulsatrix (Wied) from Eastern Brazil is quite distinct (cf. Berlepseh, 

 Bull. B. O. C. xii. p. 4, 5, and Dubois, Syn. Ac. p. 892, pi. xvi.). 



* I have not been able to verify this Quotation. 



