( 60) 



N.W. Brazil: Tefite ; Rio Junta (Garbe coll. — Mns. Panlist.); Barra do Rio 

 Negro, and Harabitanas, npjior Rio Negro (Natterer). Venezuela : Nericagna on 

 the npper Orinoco R. East Ecuador ; Sarayaon, Rio Napo (spec, in Mns. Tring). 

 Colombia : Bogota coll. (many specimens in Mns. Berlepsch, Brit., and Tring). 

 Thirty-five specimens examined. 



52. Cyrnbilanius lineatus lineatus (Leach). 



Lanius lineatus Leach, Zool. Misc. i. p. 20. tab. vi. (1814. — Berbice, Brit. Guiana). 



No. 911. J ad., 26. vi. 06. "Iris red, feet bluish grey, bill black, below 

 grey." 



Differs from Gnianan specimens by having the nnderparts less closely barred 

 with black. 



53. Thamnophilus canadensis loretoyacuensis Bartl. 



[Lanius canadensis Linnaeus, Syst. Nat. ed. xii. 1. p. 134. descr. orig. ? (1700.— ex Brissou, Ornith. ii. 



p. 171. pi. 18. fig. 3 : "Canada" — errore. — we substitute Cayenne).] 

 Thamnophilus loretoyacuensis E. Bartlett, P.Z.S. 1882. p. 374 (Loretoyacu, N.E. Peru). 

 Thamnophilus atricapillus (nee Gmelin!) Pelzeln, Zur Ornith. Brazil, ii. (18G8) p. 75 (part. : Rio 



Negro : Poiares, S. Izabel and R. Anoajai'i). 



No. 792. 8 ad., 10. vi. 00. "Iris brown, feet bine-black, bill black."— Wing 

 76 ; tail 62 ; bill 20| mm. 



Nos. 770, 777. ? ad., 8. vi. 06. " Iris greyish brown, feet bine-grey, bill black, 

 below grey-bine."— Wing 70, 74 ; tail 04, 02 ; bill 20 mm. 



These specimens as well as those collected by Natterer on the Rio Negro* 

 agree perfectly with Bartlett's types from Loretoyacu in the British Musenm. 



'/'. <*. loretoyacuensis is very closely allied to T. c. canadensis, but differs, in the 

 male sex, by the much duller and darker rnfesceut brown ground-colour of the back, 

 which, moreover, is strongly mixed with blackish. In abraded plumage, the rnfesceut 

 brown edges to the feathers of the mantle become almost entirely worn off, and the 

 mantle then appears nearly uniform blackish. Moreover, the under tail-coverts, in 

 this form, are black, except the white apical third. 



The females differ from those of T. c. canadensis by their considerably darker 

 rufous brown back with traces of blackish mottlings, and by having the foreneck 

 more coarsely striped with black. 



I may remark in this connection that the type specimens of T. leucauchen Scl.,f 

 said to be from the " Rio Negro," are of the unmistakable Cayenne-meke. In our 

 large series of '/'. c. canadensis from Cayenne, Surinam, etc., there are several 

 specimens with the sides of the neck quite as white, aud with the back of exactly 

 the same tinge as the 8 type of T. leucauchen. This name must, therefore, be 

 regarded as a strict synonym of the typical form. 



The range of the two recognisable geographical races of T. canadensis is, 

 according to our present knowledge, as follows : 



a. T. canadensis canadensis (Linn.) 



Cayenne, Surinam, Brit. Guiana ; Trinidad; Venezuela : Cumana (large series 

 in Tring), on the Orinoco River up to Mnuduapo and Maipures, on the Caura River, a 



1 am much indebted to Dr. von Lorenz, of Vienna, for the loan of these specimens, 

 j- Edinb. Acw Philos. Journ. (new ser.) i. (1855), p. 211. 



