On the Periods occupied by Birds in Incubation. 55 



7. Pternistes rufopictus. 



Ptet'nistes rufopictus, Reich. J. f. O. 1887^ p. 52. 



Hab. Central East Africa : Wembaere, Victoria Nyaiiza. 



8. Pternistes leucoscepus. 



Perdix rubricoUis, Cretzscli. [nee Gmel.) Riipp. Atl. p. 44, 

 pi. 30 (18.26) [figure resembles P. infuscatus], 



Pternistes rubricoUis, Gray, List Gall. B. iii. p. 32 (1844). 



Francolinus I'ubricollis, Gray, Gen. B. iii. p. 506 (1846) 

 [part] . 



Pternistes asiatica, Liclit. Nomencl. Av. p. 84 (1854). 



Francolinus leucoscejms, Gray, List Birds, pt. v. Gall. p. 48 

 (1867). 



Licbtenstein^s name [asiaticus], so far as piiority goes, 

 sliould stand for this species ; but as tlie name is misleading, 

 and there was no description, I have determined to adopt 

 the later name [leucoscepus) of G. R. Gray. 



Hab. North-east Africa : Massowah, Bogos, Abyssinia, 

 Somali. 



9. Pternistes infuscatus. 



Pternistes rubricoUis, Riipp. N.O.-Afr. p. 106 (1845) ; 

 Reich. J. f. O. 1891, p. 143. 



Pternistes infuscatus, Cabanis, J. f. O. 1868, p. 413 ; 

 Cabanis, v. d. Decken's Reis. iii. p. 44, pi. 14 (1869). 



Pternistes clappeiioni, Shelley, Ibis, 1888, p. 295. 



Hab. East Africa : from Mamboio northwards to Kili- 

 manjaro and Taveta. 



III. — Some further Notes on the Periods occupied by Birds in 

 the Incubation of their Eggs. By William Evans, F.R.S.E. 



Since my paper on Incubation appeared in ' The Ibis ' for 

 January last (1890, p. 52), some additional information has 

 been collected which it may be well now to bring under the 

 notice of those interested in the subject. 



In W. J. Broderip's ' Leaves from the Note-book of a 

 Naturalist,' 1852 (p. 14), the period of incubation in the case 



