( 352 ) 

 223. Myrmotherula assimilis Pelz. 



Myrmotheruh assimHis Pelzeln, Zitr Oni. Bras. ii. pp. 81, 15'2 (1868.— Borba, Rio Madeira • 

 below Poiares, Rio Negro ; Rio Amajaii) ; Hellmayr, Xoi-. Zool. xiv. p. 384 (Humaylha). 



Nos. 2.S, 41;'). cT ad., S imiu , Calama, 12. vi., IT. viii. lltiJT. — Wing 53, 54; 

 tail 29, ■M)\; bill 13J, 14 mm. 



No. 874. <f imm., Marmellos, 27. xii. 1907.— AVing 53; tail 29 ; bill 14 mm. 



Nos. 824, 870. cjcjjnv., Marmellos, 18, 20. xii. 1907.— Wing 51, 54; tail 

 30, 31 ; bill 14 mm. 



The series fully confirms the distinctness of M. assimilis. The young males 

 have the lower parts dingy (greyish) white, slightly shaded with bnffy here and 

 there, some of tlie upper wing-coverts brown edged with bufF, etc., all remains of 

 the juvenile plumage. For characters and range cf Lc. p. 384. 



224. Ramphocaenus melanurus amazonum Hellm. 



lRi.implwcaeiius nielauunis Vieillot, .V"uc. Dn_l. xxix. p. G(1819. — " Bri'sil, par Delalaade fib," sc. 



Rio de Janeiro).] 

 B. m. ainasoniim Hellmayr, Xoi: Zool. xiv. p. 66 (1907. — TeS4, Rio .Solimoens) ; idem, I.e. p. 373 



(Humaytha, Borba). 



Nos. 48, 383. t? ad., t? imm., Oalaraa, 15. vi., 12. viii. 1907. — Wing 53, 54; 

 tail 50, 47^ ; bill 22— 23i mm. " Iris brown, feet plumbeous, bill grey." 



Nos. 14, 182. ?? ad., Calama, 10. vi., 7. vii. 1907.— Wing 4s, 53 ; tail 46 ; 

 bill 22 mm. " Iris brown, feet and bill grey." 



The series fully corroborates the characters of the subspecies. The Calama 

 birds dift'er from R. m. ulhiveidris (represented in the Munich Museum by specimens 

 from Saint-Lanrent-du-Maroni, French Gniana, Le Moult coll.) by the much paler 

 " creamy buff" sides of the neck, by lacking the rufous tinge on the nape, and by 

 having the chest and sides of breast fiiintly washed with creamy. The outer 

 rectrices are tipped with smoky grey. 



R. in. atnazonum ranges from the Rio Madeira westward to Eastern Peru 

 (Yurimaguas, Sauta Cruz, ( 'hyavetas) and northward to the Rio Solimoens (Tefte). 

 Farther to the south, ou the Guapor6, one of the headwaters of the Rio Madeira, 

 it is replaced by R. melanurus sticturus Hellm., of which Natterer obtained a good 

 series at Villa Bella de Mattogrosso, Engenho do Gama, and Sao Vicente. Cf. 

 Nov. Zool. xiv. 1907. pp. 373-5, where a short review of the geographical races 

 of R. melamirus is given. 



[225. Sclateria argentata (Des Murs). 



Cf. Xov. Zool. xiv. 1907. p. 375 (Humaytha). 



Hekrocnein'm albh-eiitrin Pelzeln, I.e. p. 161 (Guajaraguai,ii, Girao, Borba). 



Both banks of the Rio Madeira : Gnajaragiiacu, Salto do Girao, Borba 

 (Natterer), Humaytha (Hotfmanns). Also found on tlie Peruvian Amazons, Rio 



Negro, and Orinoco.*] 



[220. Sclateria schistacea leucostigma (Pelz.).t 



Cf. Hellmayr, Noe. Zool. xiv. 19i)7. p. 376 (Borba). 



Right bank of the Rio Madeira : Borba (Hoffmanns).] 



• In the Cat. Birds Brit. Mits. xv. p. 277, a specimen from Bartica Grove (Whitely) is recorded s.n. 

 H. argentata. I have examined the bird ; it is without doubt a young male of Sclateria schistacea 

 Itrucostiyma (I'elz.). 



f 1 liave examined the bird from the Itio Jurafi, recorded by Ihering s.n. Sclateria leucostignia {Rew. 

 Hus. Paul vi. p. 442). It turn? out to be a male of Myrmelastes hyperythrus (.Gonld)^ 



