222 BIRDS or BRITISH GUIAXA. 



inclining to black on the head ; tail dark brown, largely notched 

 with white on the inner webs of the feathers, also edged with 

 white at the tips, and an indication of two pale brown bars 

 on the upper aspect ; inner webs of [trimarj and secondary quills 

 broadly barred with white ; entire under surface buffy- or creamy- 

 white, with dark narrow shaft-lines. 



Total length 430 mm., culmen 20, wing 224. tail 184, tarsus 70, 

 middle toe and claw 52. 



We do not know the exact locality in the Colony of the male 

 from which the description is taken. 



Adult female. Similar to the adult male. Wing 233 mm. 



Immature birds appear to have the feathers of the breast and 

 sides of the body fringed with pale brown and the dark shaft-lines 

 more strongly pronounced. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in Briti.fh Guiana. Ituribisi River, Bartica, Arawai 

 Biver (McConnell collection) ; Kamarang River ( Whitehj). 



Extralimital Eange. Eastern Peru. 



flabits. Mr. J. J. Quelch (Timehri (2) vi. p. 144) gives the 

 following remarks: — "The White-breasted Harrier-Hawk (Mi- 

 crastur mirandoUei). This species does not appear to occur on 

 the coast. This is the first record of the bird from the Colony." 



140. Micrastur g-ilvicollis. 



Lined Hawk. 



A^parvius gih-icoUisXioiW. X. Dict.d'Hist. Xat. x. p. .323, 1S17 CCayenne). 

 Climacocercus conceatricus Cab. in Schomb. Keis. Guian. iii. p. 738, 



184S. 

 Micrastur (jilvicollis ShaiiDe, Cat. B. Brit. Mus. i. p. 78, 1874 ; Salvin, 



Ibis, 1886, p. 75 (Camacusa, Bartica Grove) ; Quelch, Timehri (2) v. 



p. lOo, 1891 (Georgetown) ; id. op. cit. vi. p. 143, 1892 ; Brabourne 



& Chubb, B. S. Amer. i. p. 64, no. 588, 1912. 



"Black-barred Harrier-Hawk," "Chicken-Hawk" (Quelch). 



Adidt male. Dark slate colour above with white bars on the inner 

 webs of the primary and secondary quills ; tail dark brown, 

 inclining to black on the middle feathers, with two white bands 

 and white, or buffy-white tips; sides of face somewhat paler grey 

 than the back ; throat white with a slight tinge of grey ; breast, 

 abilomen. and sides of body barred with slate-brown and white ; 

 vent and under tail-coverts uniform creaniv-white : axilhiries 



