428 ZOOLOGICAL EESULTS OF THE RUWENZORI EXPEDITION. 



Family Ctpselid.e. 

 Ctpselus MAXIMUS Grant. 



Cypselus maximus Grant, Bull. B. O. C. xix. p. 56 (1907). 



a. ?. Mubuku Valley, E. Ruwenzori, 12,000 ft., 30th Jan. [No. 1200. I). C] 



b. 6 . „ „ 10.000 ft, 14th Feb. [No. 154. R. E. D.~\ 

 (Types of the species.) 



This species, the largest known Swift, is most nearly allied to C. africanus Temm., 

 but is much larger and darker. The top of the head and upperpart of the body are 

 dark sooty-brown, with a slight oily gloss ; the cheeks, ear-coverts, pectoral band, 

 and upper and under tail-coverts, as well as the outer web of the quills and the 

 tail-feathers, are even darker, and inclining to sooty-black. The bill and tarsus 

 are also proportionately longer than in C. africanus. Iris dark hazel ; bill and 

 feet black. 



6 . Total length ca. 8'5 inches ; culmen from the base of the forehead - 7S, exposed 

 portion - 52 ; wing 9*0 ; tail 3 - 35 ; tarsus 0-8. 



2. Total length ca. 8'8 inches; culmen from the base of the forehead - 78, 

 exposed portion - 5 ; wing 9*2 ; tail 3"45 ; tarsus 0'SI. 



In C. africanus the wing-measurement is as follows :— 9 d, 7 - 9-8-f inches; 

 2 S , 7-9-8-3. 



[These Swifts were numerous about the higher altitudes of Ruwenzori, and great 

 numbers were breeding in the high cliffs at 13,000-14,000 ft. They probably also 

 breed as low down as 10.000 ft., where there are suitable cliffs. One bird was shot 

 coming out of a crack in a cliff at 10,000 ft. in the Mubuku Valley. A large white- 

 bellied Swift, which we believed to be of this species, was often seen on the plains 

 near Lake Edward. — R. B. II'.] 



Family C a p k i m u l g i l> je. 



Caprimulgus fossei Hartl. (Plate XIX. fig. 24, egg.) 



Caprimulgus fossei Reich. Yog. Air. ii. p. 365 (1902). 

 Caprimulgus fossei clarus Reich, t. c. p. 367. 



a-e. J et d 2 imm. Mokia, S.E. Ruwenzori, 3400 ft., 30th May. [Nos. 312. 

 313. R. E. D. ■ 3430, 3431, 3432. R. R. W.] 



Iris, bill, and feet dark brown. 



The young birds have the general colour of the upperparts distinctly paler and greyer 

 than in the adult. According to Dr. Reichenow, both the subspecies mentioned 

 above occur at Bukoba, on the W. of Victoria Nyanza ; but the fact is that the so-called 



