12 BIRDS OF BRITISH GUIAXA. 



square, the secoiulary-quills being nearly equal to tlie primaries 

 in lenotl), the fourth and fifth primaries longest, the third about 

 equal to the seventh. Tail rounded, the two middle feathers 

 longest and about six-sevenths the length of the wing. Colora- 

 tion : the male is black banded with white, and the female almost 

 entirely rufous both above and below. 



355. Thamnophilus doliatus. 

 White-barred Bush-Shrike. 



Black and White Butcher-bird, Edwards, Gleanings of Nat. Hist. i. 

 p. 35, pi. 226, 17oS (Surinam). 



Lanius doliatus Linn. Syst. Nat. i. p. 136, 1766 (Guiana). 



Thamnophilus doliatics Cab. in Schomb. Reis. Guian. iii. p. 687, 1848; 

 Salvin, Ibis, 1885, p. 421 ; Sclater, Cat. B. Brit. Mus. xv. p. 207, 

 1890 (Georgetown); Quelch, Timehri (2) v. p. 93, 1891 (George- 

 town) ; Brabourne & Chubb, B. S. Amer. i. p. 191, no. 1908, 1912. 



"Check-bird'' {Quelch). 



Adult male. General colour both above and below black barred 

 with white ; crown of head white with ovate black tips to the 

 feathers ; forehead, throat, sides of face, and hind-neck black with 

 white fringes to the feathers, which impart a streaked appear- 

 ance ; flight-quills and tail-feathers black, with white marks on 

 the marginal jjortion of both webs but not continued across the 

 feathers. 



Total length 154 mm., culmeri 20, wing 72, tail 61, tarsus 28. 



The specimen from which the description is taken was collected 

 on the Bonasika River. 



A young male, from the same locality, differs from the adnlt 

 in having the flight-quills marked with rufous and the primary- 

 coverts margined with the same colour, the upper tail-coverts 

 tipped with rufous, and the lower abdomen and flanks tinged with 

 ochreous. 



Immature male. Rufous-brown above, with paler cross-bars to the 

 more advanced feathers, which are dark brown on the sides of the 

 upper back; upper wing-coverts dark brown margined with rufous; 

 flight-quills dark brown, marked with rufous or pale buff on the 

 margins ; tail-feathers similar to those of the adult, with a tinge 

 of rufous at the tips; a few black feathers on the top of the head; 

 under, surface ochreous-white with dark brown cross-bars to the 

 feathers. 



