1874.] THE GENUS SAXICOLA. 



233 



received distinct names, and appear to us to possess good distinctive 

 characters, we have deemed it best to keep them separate. Mr. 

 Layard only quotes plate 184. fig. 2 of Levaillant ; but he describes 

 the young as grey. The specimens which we have identified with 

 S. castor and &. leucomelcena have every appearance of being fully 

 mature birds. 



25. Saxicola arnotti. 



Saxicola arnotti, Tristr. Ibis, 1869, p. 206, pi. vi. 



Male. Head and body jet-black, a few white feathers on the 

 crown ; forehead and supercilia white, wings blackish brown, shoulders 

 white, tail entirely black. Bill from the gape 0"8, wing 3*9, tail 3, 

 tarsus l'l. 



Hab. Adam Kok's New Land, S. Africa {teste Layard). 



We have not seen a specimen of this species, and copy the above 

 from Mr. Tristram's original description. 



26. Saxicola leccomemna. (Plate XXXVII. figs. 1 & 2.) 



Saxicola leucomelana, Burchell, Travels in S. Afr. vol. i. p. 335, 

 note (1822). 



Saxicola leucomelcena, Strickland & Sclater, Jard. Contr. 1852, 

 p. 146. no. 27. 



Dromolcea albipileata, Bocage, Jorn. Sc. Lisb. 1867, p. 151. 



? Saxicola alpina, Chapman, Travels in S. Afr. App. p. 399 (1868), 

 desc. nulla. 



Adult male. Head, nape, and hind neck white, with a greyish 

 tinge ; shoulders, rump, and upper tail-coverts, abdomen, and basal 

 portion of all except the two central rectrices white ; thigh-coverts 

 and under tail-coverts mixed white and black ; rest of the plumage 

 black, glossy black on the back and breast, quills brownish black ; 

 the black on the sides of the head includes the lores and the feathers 

 immediately above the eye. On the outer tail-feathers the white 

 often extends quite to the tip, a black spot only being left on the 

 outside of each web ; on the outermost tail-feather the black extends 

 much further up the web than on the next two or three. In one 

 specimen the outer tail-feather on each side is pure white, therein 

 agreeing with Professor Barboza du Bocage' s description of $. albi- 

 pileata. Some specimens (? winter plumage) have the head French 

 grey, the feathers having a dark central streak ; and in one, which 

 may be immature, the whole abdomen is black. Culmen 0*9, wing 

 4*25, tail 285, tarsus 1-2. 



Hab. South Africa, Damara Land. 



27. Saxicola griseiceps, sp. nov. (Plate XXXVII. fig. 3.) 



S. capite nuchaque cinereis ; humeris, uropygio, supracaudalibus, 

 rectricibus externis omnibus, nisi ad apices, abdomineque albis ; 

 collo, dorso, alis, rectricibus mediis, apicibus rectricum ceetera- 

 rum, loris, regione auriculari, gutture, pectoreque nigris. Culm, 

 long. 0"9, alee 4*4, caudce 2'8, tarsi 1*25. 



Proc. Zool. Soc— 1874, No. XVI. 16 



