172 Mr. R. B. Sharpe on the 



Clavis specierum. 



a. Abdomen white. 



a'. Rump white or greyish 1. castanea. 



b\ Rump uniform with the rest of the back 2. blissetti. 



b. Underneath entirely orange-rufous 3. concreta. 



1. DlAPHOROPHYA CASTANEA. 



Platystira castanea, Fraser, P. Z. S. 1842, p. 141 : Gray, 

 Gen. B. i. p. 257 (1846) ; Allen & Thorns. Exp. Niger, ii. 

 p. 498 (1848) ; Fraser, Zool. Typ. pi. 34. fig. 2 (1849) ; Bp. 

 Consp. p. 322 (1850). 



Platystira leucopygialis, Fraser, P. Z. S. 1842, p. 142 ; Gray, 

 Gen. B. i. p. 25 (1846) ; Allen & Thorns. Exp. Niger, ii. p. 499 

 (1848) ; Fraser, Zool. Typ. pi. 34. fig. 1 (1849) ; Bp. Consp. 

 p. 322 (1850) ; Strickl. Contr. Orn. 1851, p. 163; J. & E. 

 Verreanx, Rev. et Mag. de Zool. 1851, p. 309; id. op. cit. 

 1855, p. 418 ; Hartl. Orn. W. Afr. p. 95 (1857) ; Cass. Pr. 

 Philad. Acad. 1859, p. 50 ; Hartl. J. f. O. 1861, p. 169 ; Gray, 

 Hand-1. B. i. p. 329 (1869) ; Sharpe, Ibis, 1870, p. 480; id. 

 P.Z. S. 1871, pp. 133, 610; id. Cat. Afr. B. p. 43 (1871). 



Diaphorophyia leucopygialis, Bp. C. R. xxxviii. p. 353 

 (1854). 



Agromyias leucopygialis, Heine, J. f. O. 1861, p. 133. 



Adult male. Crown of head and nape, as far as the centre 

 of the back, and wing-coverts glossy blue black ; cheeks, ear- 

 coverts, scapulars, lower back, and rump pure silky white ; 

 quills black, white at the base of inner web, the secondaries 

 very narrowly margined with white externally near the base ; 

 upper tail-coverts and tail glossy black ; under surface of body 

 entirely pure white, with a broad blue-black band across the 

 breast ; under wing- coverts externally black, the lower ones 

 margined with white ; axillary tuft white ; bill black ; feet 

 brown; iris yellow, eye-wattle bright scarlet. Total length 

 3*4 inches, culmen - 5, wing 23, tail TO, tarsus 065. 



Adult female. Totally different from the male. Above 

 chestnut, the rump greyish varied with white ; head bluish 

 grey ; quills brown, externally margined with chestnut ; tail 

 blackish ; chin white ; cheeks, throat, and breast chestnut ; a 

 little spot of white under the eye ; rest of under surface silky 



