370 falconidj:. 



Key to the species. 



a. Hind neck white semitorquatus, p. 370. 



h. Hind neck slaty blue, like back imiynis, p. 370. 



1. Poliohierax semitorquatus. 



FaJco semitorquatus, fimitli, Rep. Exp. Centr. Afr. p. 44 (1836), and 



ni. Ind. Orn. S. Afr. pi. 1 (1849) ; StricM. Orn. Syn. p. 93 (1855); 



Heugl. Oni. N.O.'-Afr. T^. 'i^ {ISmy 

 Hypotriorcliis semitorquatus, Gray, Gen. B. i. p. 20 (1844) ; Scl. 



P. Z. S. 1864, p. 107 ; Gray, Hand-l. i. p. 22 (1869). 

 Polihierax semitorquatus, Kaup, Isis, 1847, p. 47 ; Bj}. Coiisp. i. p. 20 



(1850) ; Jforsf. ^- Moore, Cat. B. Mas. K I. Co. i. p. 16 (1854) ; 



Bp. Rev. ei May. de Zool. 18.54, p. 537 ; Anderss. P. Z. S. 1864, p. 4 ; 



id. B. Dam. Ld. ed. Gurney, p. 19 (1872). 

 Hypotriorcliis castanonotus, Henql. Ibis, 1860, p. 407 : Scl. Ibis, 1861, 



p. 346, pi. xiii. ; Gray, Hand-l. B. i. p. 22 (1869).' 



Adult male. Above Uuisli grey, the head darker, the hind neck 

 and upper tail-coverts pure white ; quills and tail brown, spotted 

 on the outer and barred on the inner webs with white, the secon- 

 daries and tail-feathers also tipped with white ; forehead, sides of 

 the face, and underparts white ; under wiug-coverts white, with 

 indistinct brown cross bars on some of the lower ones ; bill yellow, 

 horn-coloured at tip ; cere, orbits, and feet yellow, claws horn- 

 brown. Total length 7*o inches, culmen 0-5, wing 4-6, tail 3-2, 

 tarsus 1"2. 



Adult female. Differs from the male in having the interscapulary 

 region and scapulars deep vinous chestnut. Total length 7*o inches, 

 culmen 0'5, wing 4-8, tail 3, tarsus 1-1.5. 



A specimen, apparently of an adult male, from North-eastern 

 Africa, collected by Sir W. C. Harris, is in the Museum. It is 

 rather darker grey than the South-African examples, and has the 

 white bars on the under surface of the wings and tail rather 

 broader. 



Hab. South-eastern and North-eastern ^yrica. 



2. Poliohierax insignis. 



• 



Polihierax insignis, Wald. P. Z. S. 1871, p. 627, et Ibis, 1872, pp. 200, 



471. 

 Lithofalco feildeni, Hume, J. A. S'. B. 1872, p. 70. 



Adidt male (type of species). Above slaty blue, with distinct 

 black shaft-stripes to the feathers of the head and back ; lower 

 back, rump, and upper taU-coverts pure white ; wing-coverts a 

 little darker than the back, and not having such distinct shaft- 

 stripes ; primary coverts and primaries blackish, the secondaries 

 somewhat washed with slaty grey, spotted externally and barred 

 internally with white; tail black, tipped with white, and crossed 



that Mr. Fortune procured these birds from Manilla, whence also Mr. Swinhoe 

 has once received a collection, and I have accordingly altered the locality of the 

 specimen. 



