( 19 ) 



Compared). Central Peru: Ropaykimba, Garita del Sol (<? in Mns. 



Berlepsch examined). W. Brazil : Mattogrosso and Engenho do Gama 



(Natterer coll.— a large series in Vienna Museum exam.). North Brazil : 



Santarem. 

 Both C. n. nigrescens and C. n. approximans are perhaps snbspecies of 

 C. tyrannina, but their distribution is not qnite in accordance with what we might 

 expect. C. tyrannina has an uninterrupted range from Eastern Colombia (Bogota 

 coll.) through the Orinoco and Rio Negro district to British Guiana, but reappears 

 in Para, while in Surinam and Cayenne C. n. nigrescent apparently takes its place ! 

 Yet it is remarkable that C. tyrannina nowhere occurs together with any form 

 of the C. nigrescens group. 



40. *Hypocnemis cantator peruvianus Tacz. 

 [Formicarius Cantatar (sic!) Boddaert, Tabl. PI. en!., p. 44 (1783— ex Daub. PI. enl 700, f. 2— 



Cayenne).] 

 Hypocnemis cantator, peruvianus Taozanowski, Orn. Plrou, ii. p. 61 (1884 — Yurimaguas, North 



Peru). 



No. 508. S ad., Itaituba, 29. i. 06. " Iris brown, bill black, below greyish 

 white." 



No. 522. 3 imm., Itaituba, 31. i. 00. Soft parts as above. 



No. 515. ? ad., Itaituba, 30. i. 00. Soft parts as above. 



These specimens agree very well with skins from North Peru. The S 3 of 

 this form differ from typical II. c. cantator by having a large concealed white 

 dorsal patch, and by the interscapular feathers being coarsely spotted with black 

 and distinctly edged with white. In the ? ? , the anterior portion of the back 

 shows faint blackish spots and a few buff longitudinal streaks, while it is uniform 

 dull olive brownish in the typical form. 



Not yet recorded from Santarem. 



47. *Hypocnemis leucophrys angustirostris (Cab.) 



[Pithyt leucophrys Tschudi, Arch. Naturg. 10. i. (1844), p. 278, descr. orig. £ (Peru).] 

 Conopophaga angustirostris Cabanis : in Schomburgk, Reisen Brit. Guiana iii. (1848), p. 685, 

 descr. orig. $ (" Kiistenwalder vou Brit. Guiana "). 



No. 453. $ ad., Itaituba, 10. i. 00. " Iris dark red, feet bluish black." 

 No. 491. S imm., Itaituba, 20. i. 00. " Iris brown." 

 No. 454. & juv., Itaituba, 10. i. 06. " Iris brownish grey." 

 No. 487. ? ad., Itaituba, 20. i. 00. " Iris brown." 

 Nos. 452, 486. ? ? juv., Itaituba, 10, 25. i. 06. " Iris greyish brown." 

 The adults agree perfectly with Gnianan specimens, while typical //. I. leucophrys 

 of Peru, Colombia and Merida is of a much darker slate-grey colour below in 

 the male sex. The females of the two forms are not distinguishable. 



The young birds sent by Mr. Hoffmanus undoubtedly belong to this species, 

 and not to //. lugubris (Cab.), as is proved by their dusky under mandible and 

 by the indications of the ferruginous superciliary stripe. The latter is altogether 

 wanting and the under mandible is always yellowish white iu the female of 

 //. lugubris. 



Having examined eighty-five specimens of //. leucophrys, I cau distinguish two 

 forms : 



a. II. leucophrys leucophrys (Tsch.), ranging from S.E. and Central Peru to 

 Colombia (Bogota) and N.W. Venezula (Merida, Tachira). 



