( 297 ) 



of a rather purer grass-green ; throat, chest, and sides decidedly washed with 

 greenish. 



Wiug 5(), 5sl ; tail 45, 47^ mm. 



Examined: one i ad. from Peba3 (t3-pe) ia the British Museum; one adnlt, 

 Rio Napo, in tlic Trin;,'-, and two adult males. La Merced, C Peru, in the Braniolci 

 Museum. 



Ohs. Tin' two last-named skins are larger (wing (lO^r, 63A ; tail 49|, 53 mm.), 

 and may again lie different. The Napo liird is practically identical with the type. 



IKi. Rhynchocyclus sulphurescens assimilis Polz. 



[^PhitUrhiiiKhia suJp'iiirenri-in Spix, Av. linn. ii. p. 11). pi. xii. fig. 1 {■'(J") (182,5.— Rio de 



Janeiro, etc.).] 

 Rhijiichoi'i/cliis axsimilis Pelzein, Znr Oni/lh. C/m. ii. pp. 110, 181 (1868. — Engenho do Gama, Rio 



Guapore ; Boiba, Rio Madeira ; Rio Negro, Barra ( = Manaos).* 



Nos. 98, 354. c?c? ad., Calama, 23. vi., 8. viii. 1907.— Wing 70, 71 ; tail 

 57,60; bill 13 mm. 



Nos. 217, 333. ?? ad., Calama, 13. vii,, 5. viii. 1907.— Wing (i 5, Gt; tail 

 60, 51 ; bill 12 mm. 



No. 185. juv., Calama, 7. vii. 1907.— Wing 61 ; tail 49 ; bill 12 mm. 



Nos. 930, 1045. c?(? ad., Maruins, 14. vi., 21. vii. 1908.— Wing 68,69 ; tail 56; 

 bill 13 mm. 



" Iris lirown, feet and bill black, lower mandible greyish." 



The series agrees with Natterer's typical specimens iu the Vienna Museum. 

 R. s. assimilis, from the Rio Negro and the Madeira district, differs from R. s. 

 sulpkiirescens, of (Sonth-Easteru Brazil, by its much duller, less yellowish green 

 back, and by having the pileum nearly uniform slate-grey, with scarcely any 

 greenish admixture. The other characters — viz. smaller size, paler yellow wing- 

 markings and under parts, etc. — however, do not hold good. 



E.xamples from Northern Pern (Huambo, Xeberos, Chamicuros) agree with 

 assimilis in the coloration of the cap, but the back is bright olive-green, even 

 brighter than in sulphurescens. I take them to beloig to R. sulphurescens 

 peruviiims Tacz.,-f- though 1 have not yet examined skins from the type locality. 



114. Rhynchocyclus poliocephalus sclateri Hellm. 



Wujnchorjjdus /luliufji'irilas srlaleri Hellmiyi', Verhanll. ZoA. BA. Geselhch. Wien liii. p. 207 

 (1903.— Barra do Rio Negro). 



No. 396. ? ad. (in worn plumage), Calama, 15. viii. 1907.— "Iris yellowish 

 grey, feet and bill black."— Wing 54 ; tail — ; bill 11 mm. 



Agreeing with the type and other specimens from Guiana, Bahia, Rio Negro, etc. 

 This is the R. megxcephalus of Sclater & Salvia, but not of S.vaiasoa, | as I have 

 poiated out in another p.aper.§ It is closely allied to R. poliocphxlas Tacz., from 

 Upper Amazonia, in fact its eastern representative. Ia the following lines I give 

 a short summary of their characters and geographical distribution, together with 

 the principal synonymy : — 



There are no specimcn.s from S. Vicente, also mentioned by Pelzein, in tlie Viennii Museum, 

 t H/ii/neliocyclics jieniriamii Taczanowiki, Pioc. Zool. Soc. Land. Isn. p. .i:i7 (Ropavbamba, Centra 

 Peru). 



% Tyrammla megacvphala Swainson, Birds Brazil pi. 47. 

 § VerhandK iiwl. But. Gesellsch. Wien liii. 1903. pp. 205-7. 



