38 BIRDS OF BRITISH GUIANA. 



each side is about three-fourths the length of the middle ones. 

 The feet are slender, the tarsus about two-thirds the length of the 

 tail. Coloration : male and female similar. 



Key to the Species.. 



A. Smaller, tail less than 40 mm. 



a. Crown of head black H. sticturus, 3 , P- 38. 



6. Crown of head for the most part chest- 

 nut H. sticturus, $,p. .38. 



B. Larger, tail more than 40 mm. 



c. Crown of head black B". roraiw^, J , p„ 39. 



d. Crown of head black with white tips 



to the feathers H. roraimw, 5 , p. 39. 



372. Herpsiloclimus sticturus. 



Spotted-tailed Ant-bird. 



Herpsilochmus sticturus Salvin, Ibis, 1885, p. 424 (Bai-tiea Grove, 

 Camacusa) ; Sclater, Cat. B. Brit. Mus. xv. p. 245, 1890 (Cama- 

 cusa, Bartica Grove) ; Brabourne & Chubb, B. S. Amer. i. p. 199, 

 no. 2000, 1912. 



Adult male. Crown of head, nape, hind-neck, a line in front 

 and behind the eye black, which colour also extends on to the 

 middle of the back, where the bases of the feathers are grey and 

 the subapical portion white ; scapulars, rump, and upper tail- 

 coverts lead-grey; upper wing-coverts black tipped with white, the 

 white increasing in extent on the greater series ; bastard-wing, 

 . primary-coverts, primary and secondaryquills black margined with 

 white ; tail black with white marginal spots and white tips to the 

 feathers, the white increasing in extent on the outer feathers ; 

 eyelids, lores, and a line over the eye, which is continued on to the 

 sides of the nape, white like the -throat, middle of the abdomen, 

 under tail-coverts, axillaries, and under wing-coverts ; cheeks, 

 sides of breast, and sides of the body lead-grey. 



Total length 97 mm., exposed culmen 14, wing 50, tail 31, 

 tarsus 19. 



Adult female. Differs from the adult male in having the 

 feathers on the head partially chestnut, the back paler, a tinge of 

 isabelline on thfe breast, and much palef on the abdomen and 

 sides of the body. Wing 49 mm. — 



The female described is the co-type, and was collected by the 

 late Henry Whitely at Kamakusa on the 8th of May, 1882 ; now 

 in the British Museum — Salvin-Godinan collection. 



