MYRMOTHERULA. 27 



tail-coverts dusky without any pale margins to the feathers : < ail- 

 feathers slightly margined with whitish or snlphur-vellow ; 

 a rather broad white streak below the eye; chin and throat white; 

 sides of the face and sides of the breast similar to the back ; middle 

 of the breast, abdomen, under tail-coverts, sides of the body, and 

 under wing-coverts yellow. 



Total length 61 mm., exposed culmen 13, wdng 38, tail 16, 

 tarsus 17. 



Adult female. Similar to the adult male, but differs in having 

 the chin, throat, and upper breast yellowish buff, and the feathers 

 on the sides of the face and the top of the head edged with the 

 same colour. AVing -41 mm. 



The male and female described were collected on the Supenaam 

 River. 



Breedinci-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range inJBritish Guiana. Supenaam Ji\Yer(^McConnell collection) ; 

 Bartica, Kamakusa {Wliitehj). 



Extralimital Range. Surinam [Penard), Cayenne (Gmelin), 

 Northern Brazil, Colombia, Ecuador, Peru. 



Hahits. According to Schomburgk (Reis. Guian. iii. p. 688) 

 this bird lives in low brush on the outskirts of the woods, in the 

 fields cultivated bv the natives, and in the neiohbourhood of rivers. 



365. Myrmotlierula surinamensis. 



Surinam Ant-bird. 



Sitta surinamensis Gmel. Syst. Nat. i. p. 442, 1788 (Surinam). 



Formicivora quadrivittata Cab. in Schomb. Eeis. Guian. iii. p. 688, 1848. 



Myrmotlierula surinamensis Salvin, Ibis, 18So, p. 42o (Camacusa); 

 Sclater, Cat. B. Brit. Mus. xv. p. 231, 1890 (Takutu liiver, Cari- 

 mang Kiver) ; Brabourne & Chubb, B. S. Amer. i. p. 196, no. 1962, 

 1912. 



Adxdt male. General bolour of the upper surface black with 

 white tips and edgings to the feathers, narrower on head, hind- 

 neck, flight-quills, and tail-feathers, and broader on the upper 

 back, where the bases of the feathers are white, and the upper 

 wing-coverts; sides of lower back and rumj) lead-grey; sides of 

 face and under surface white with nanuw black shaft-streaks to 

 the feathers, the white [tortion inclining to grey on the sides of 



