( 286 ) 



Valley, Venezuela, ami the throat pure white like adult birJs of the form jast 

 meutioiieil. There is, however, one character which serves to distiugaish readily 

 the Madeira form from P. s. gri.neiceps, that is, the lunch paler and clearer, greenish 

 olive-brown fiustead of rufescent or deep rnsset-brown) colour of the back. The 

 immatnre birds, the type from Salto do Girao and the S from Calaraa, differ by 

 having the throat aud lores washed witii pale sulphur-yellowish, the cap much 

 paler slate-grey, tinged with olivaceous, the sides of the head clear olive-grey, the 

 back decidedly lighter brown, aud the belly paler ochraceou-s. The greater upper 

 wing-coverts and the qnills show narrow, rufescent apical margins. 



The following condensed review of the geographical races of the P. senex 

 group may be useful to students of ths neotropical ornis. 



(a) Platyrinclius senex senex Scl. & Salv. 



Platift-hijiichu^ senex Solater & Salvia, Proc. Zool. Soc. LonJ. 18S0. p. 156 (Sarayai,-u, Eistero 

 Ecuador) ; Taczanowski, P. Z. H. Loud. 1882. p. 18 (Yurimaguas, N. Peru ; deicr. ? ad.) ; 

 idem, Orn. Percu ii. 1884. p. 22t (Yurimaguas) ; Sclater, Cd. Birds Brit. Has. x\i 1888. p. 65 

 (Sarayafu ; Chamicuros, N. Peru). 



Hah. Eastern Ecuador : Sarayacu (Buckley I. North Peru : Yurimaguas 



(Stolzmann), Chamicuros (Mus. Brit.). 



Type localiti/ : Sarayacu, Eastern Ecuador. 



Specimens examined : 



Wing. Tail. Bill. 



1. Mas. Brit. Adult (not sexed), Sarayaijn .^Typesqf 62 32 12 mm. 



2. „ „ Av. imm. „ „ „ .J" species 05 33 12J „ 



3. ,, „ Adult „ ,, Chamicuros . 68 3" 12 „ 



Ai/'ilt. Top of the head slaty blackish with a half-concealed white coronal 

 patch ; back deep rufescent brown ; * sides of the head very dark slate-grey. 

 Throat white, rest of under surface deep ochraceous. 



Obs. From the scanty material at hand it is difficult to say whether this form is 

 really distinct from P. s. griseiceps. Nos. 2 and 3 have the cap decidedly darker, 

 more blackish, than any specimens of the latter race, but No. 1 approaches it very 

 closely in that respect. Other differences do not exist, for the colour of the back 

 and belly, npon which Salvin, when describing P. griseiceps, laid much stress, 

 proves to be variable. None of the specimens seen by me being sexed, I cannot 

 say whether the sexes are alike or not, but probably the female has less white on 

 the crown as is the case in the allied forms. 



(b) F'lati/rinchus senex griseiceps Salv. 



Plali/rlii/iichiis griseiceps Salvin, Bull. B. 0. C. no. xlviii. p. xv. (Nov. 1897. — " Aunai.f British 

 Guiana"); Berlepscli & Hartert, .Voc. Zool. ix. 1902. p. 37 (Caura, Venezuela). 



P. roxidliix (uec Latham) Pelzeln, Zur Ornilh. Bras. ii. 1868. p. lOll (part. : Serra Carauman, Rio 

 Branco). 



P. sene.r (nee Sclater & Salvin) Hartert & Hellmayr, Bull. B. (). C. xii. 1902. p. 04 (.Serra 

 Carauman). 



Ha//. British tiuiauii : Onrumee (H. Whitely, jun.). Surinam: near Paramaribo 

 (Chunkoo). N.E. Brazil : Serra Carauman, on the Rio Branco (Natterer;. East 

 Venezuela, Caura Valley : Suapure (Klages), Nicare, La Pricion (E. Andr6). 



* The term *• yellowish olive" usetl by Dr. Sclater {I.e. p. ti5) is altogether misleading, 

 t This is a mistake, the tjpe being from Ourumee. 



