C 49 ) 

 170. Myiobius barbatus (Gru.)- 



iluxricapa barbata' G ml., 8 ;/.</. \,il. I., 1 (1788) p. 93:5 (ex Buff.— " Cayenne"). 



Suapure, Caura R. : " tj " ad. 12 April, 1900. "Iris dark grey, feet greyish 

 black ; bill, maxilla, and top of mandibula lilack ; rest is white " (Klages). 



Al. 66, uaud. 58i, calm. lOi, tars. 16^ mm. 



La Pricion, Caura R. : ? 4. ii. 1901. Al. 63, caud. 58, culm. 11, tars. 15 mm. 

 (Andre). 



These birds agree perfectly with sj>ecimens from British Gaiaua(Whitely coll.), 

 except that the tail appears to be slightly blacker, a character which seems to point 

 towards M. barbatus atricaudus. 



171. Myiobius barbatus atricaudus (Lawr.) ? 



Muscicapa barbata Gml., Syst. Xal. I., 1. (1788) p. 933 (ex Buff. — ''Cayenne"). 

 Myiobius alricawlus Lawr., Ibis 181)3 p. 183 (typ. ex Panama). 



Gaicara: c? ad. ? ad. 26 Feb. 1898. "Iris blackish, feet slate, bill blackish 

 above, pale below." (Nos. 10278, 10270 Gherrio.) 



(S al. 61, caud. 62A, culm. 9|, tars. 161 mm. 



? „ 57, „ 57^, „ 9|, „ 15| „ 



These Gaicara birds differ from those from the Gaura R. by having the upper 

 breast, sides of body, and under tail-coverts suffused with fulvous. By this character 

 they approach M. h. xantliopijgius (Spix) from Brazil : bat the falvons tinge is not 

 so strong nor so sharply defined on the breast, and the rectrices are intense black, 

 not brownish black. 



The Gaicara specimens ought to be compared with typical birds from Panama, 

 of which Lawrence says : "tinged with pale fulvous on the throat." Adult males 

 from Gosta Rica have the breast and sides of body somewhat less decidedly suffused 

 with fulvous, but are otherwise quite similar. 



172. Myiobius erythrurus Gab. 



Myiobius erythrurus Cab., Wiegm. Arch. 1844 i. p. 249 pi. 6, f. 1 {Guiana,f Cayenne). 



Nericagua : c? 5. iv. '99. " Iris seal ; feet dusky greyish horn-colour ; bill 

 above blackish, below pale with blackish tip." (12418, Cherrie.) 



La Pricion, Gaura R. : " ? ? " 31. i., 2, 7. ii. 1901 (Andr^). 



Nicare, Gaura R. : " ? ? " 18, 19. i. 1901 (Andre). 



Suapure, Gaura R. : ¥ (?) 12. x. (Klages). 



The Nericagua specimens agree best with specimens from Brit. Guiana, but the 

 upper head and back are of a somewhat lighter greyish olivaceous, and the uropygium 

 is more suffused with greyish olive-brown instead of being pale fulvous. The 

 throat is less whitish, being more suffused with cinnamon, and the rufous of the 

 breast and abdomen is a little darker. The tail is somewhat longer. 



The Gaura specimens are somewhat intermediate, having the rump less suffused 

 with greyish brown. Therefore, and as there is evidently a certain amount of 

 individual variation in this respect, it seems hardly possible to separate the Orinoco 

 birds as a subspiecies. 



* Muscicapa fasciata Miill. Natursyst. Siippl. p. 172, quoted by Dr. Sclater with a nuury among the 

 synonyms of Myiobius barbatus^ does not belong to it, bnt to M, naeviu-s (Bodd.). 

 t We accept British Guiana as the typical habitat. 



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