DICHROPOGON. 67 



altogether in colour as well as in its proportionate forms. The 

 bill is small and narrow. The wing, which is rounded, has 

 the third, fourth, fifth, and sixth primaries longest, the second 

 about equal to the eighth. The tail, which is nearly square at 

 the tip, is about two-thirds the length of the wing. The legs and 

 feet are proportionately strong ; the tarsus exceeds the length of 

 the exposed culmen by about two-fifths. Coloration : male and 

 female similar. 



391. Dioliropog-on pcecilonota. 



Spottbd-bacebd Aint-Cbeepee. 



Hypocnemis pcecilonota Cab. Arch, fiir Naturg. 1847, p. 213, pi. iv. 

 (Guiana) ; id. in Schomb. Eeis. Guian. iii. p. 684, 1848 ; Salvin, 

 Ibis, 1885, p. 428 (Eoraima, 3500 ft., Camacusa, Atapurau Eiver, 

 Bartica Grove); Sclater, Cat. B. Brit. Mus. xv. p. 286, 1890 

 (Bartica Grove, Camacusa, Eoraima, Atapurau Eiver) ; Brabourne & 

 Chubb, B. S. Amer. i. p. 211, no. 2125, 1912. 



Adult male. General colour above and below slate-grey, the 

 feathers on the middle of the back subapically black and edged 

 with white at the tipsj upper wing-coverts and innermost secon- 

 daries black margined with white at the tips of the feathers, 

 outer edge of bastard-wing white like the outer margin of the 

 first primary ; prima»y-coverts blackish with just a trace of white 

 ai the tips ; inner webs of flight-quills dark brown with whitish 

 edges ; upper tail-coverts and tail-feathers black tipped with 

 white, the latter spotted with white on both webs ; under surface 

 paler slate-colour than above, especially on the chin, abdomen, 

 under tail-coverts, and under w'ing-coverts, all of which incline 

 to ash-grey. 



Total length 119 mm., exposed culmen 15, wing 64, tail 40, 

 tarsus 24. 



The male bird described was collected on the Bonasika River 

 in 1911. 



Adult female. Differs from the adult male in having the chin, 

 sides of the face, and fore part of the head bright rufous, somewhat 

 darker on the hinder crown and nape, and the entire back and 

 wings suffused with ochreous-brown as are also the lower flanks 

 and under tail-coverts. Wing 63 mm. 



The female described was collected on the Ituribisi River in 

 November 1906. 



F 2 



