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53. Phoethoruis ruber ruber (Linn.) 

 Cfr. Nov. Zoal. xiii. p, :.7.V 



No. 526. ? iniru., Itaitnba, 31. i. 06. "Iris Mack, bill Mack, base of lower 

 mandible yellowish green." — Wing 35; rectr. mod. 33, submed. 27, ext. 15; 

 bill 25J, black tip of lower mandible 11 mm. 



An immature bird with long wings and wide rufous tips to the tail feathers. 

 This plnmage Las been described by Gould as a distinct species, P. eremita, but it is 

 now well understood that these birds are merely the young of the short-winged, 

 broad-taihd form. 



The Santarem specimen agrees in every way with those from Surinam, Para, 

 . and. like them, has the lower mandible widely tipped with black. 



54. Agyrtria albiventris albiventris (Less.) 

 Iris Lesson. Hist. Nat. Ois. Mouches p. xxxiv, 209, pi. 76 (1829. — "la Guiane"). 

 Nos. 553, 5G5. 3 S imm. in moult, Urucuritnba, 8, In. ii. 06. " Iris Mack." 

 Nos. 501, .502. $ ad., $ imm. iu moult, Itaitnba, 28. i. 00. "Iris black." 

 Besides these, we possess an adult and a young bird from Espiritn Santo, Pani, 

 collected by Prof. Steere. 



The Lower Amazonian specimens are somewhat intermediate between .1. u. 

 albiventris and .1. ". nigricauda (Ell.) of Bahia. They agree with the former in 

 dimensions and in the bronzy-green central tail feathers; but the outer rectrices are 

 steel-black, with scarcely any green at the base and with very indistinct greenish 

 grey tips, as in the Bahia form. The under tail-coverts are white, with short 

 blackish brown shaft-stripes at the extreme base, as is also the case in some 

 specimens of .1. a. nigricauda. 



The specimens collected by Natterer near Barra do Rio Negro (Manaos) and 

 Barcellos, and recorded by Pelzeln s. n. -1. albiventris* represent the typical form, 

 the four outer rectrices being bronze-green on their basal half, and the under tail- 

 coverts being pale brownish with white margius, just as in a large series from 

 British Guiana, Surinam, etc. The specimens from Mattogrosso, however, belong to 

 A. a. nigricauda or a very closely allied form. I have to thank Dr. von Lorenz for 

 sending me Natterer's whole series for comparison. About the nomenclature of 

 .1. albiventris cfr. Berlepsch and Hartert, Nov. Zoo/, ix. p. 83. 



•">•">. Hylocharis cyanus viridiveutris Perl. 

 Cfr. Nov. Zool. xiii. p. 870. 



Nos. 447, 407, c? juv., ?, Itaitnba, 15, 19. i. 06. "Iris black." 



56. Thalurania furcata furcatoides Gould. 



Cfr.iVbl'. Zool. xiii. p. 377. 



Th i vie i ( lhapman & Biker, Auk, 1891, p. 30. 



Nos. 166, 182, 7'!-. ¥ V, Itaitnba, 19, 22, 30. i. 06. '•Lis black." 



i">7. Nyctidromus albicollis albicollis (Gm. 

 Gmelin, Sysl. Nat. 1. ii. (1788) p. 1030 (ex Latham : Cayenne). 

 ■V>. - Riker & Chapman, .!«/., 1801, p. 30 (Santarem). 



No. 432. <!, ad., Itaitnba. 12. i. 06. "Iris brown." 



Agreeing in size and coloration with specimens from Surinam. 



* On. Brasil i. - 



