1 92 1.] Birds of Tdnso and adjoviing Islands, 267 



H.M.S. ' Dwarf,' in lat. 10° 0' N., lono-. 15° ^,0' W., on June 

 14tli, 1920, wliile the gunboat was at sea off Portuguese 

 Gruinea. Mr. Lowe skinned the little bird, and it proved to 

 be a new race, which 1 named SarotliruraJiohmi d<mei in 

 honour of Lieut. -Commander Dane, II. N., of H.M.S. ' Dwarf 

 (c/: Bull. B.O. (J. vol. xli., Oct. 11)20, p. a). 



Another bird, the identification of which has been anything 

 but easy, figures in my list as Sterna [species undetermined] 

 ?<Zr)»r/a///, Mont. The Roseate Tern. This is amostremarkable 

 specimen, which has puzzled several ornithologists to whom I 

 have submitted it. Dr. Hartert has, I believe, come nearest 

 to identifying the bird ; he writes " I should describe it as a 

 gigantic specimen of Sterna dongalU with aljnormiillv deep 

 cleft feet." He notes that Sterna douf/alli gracilis of Australia 

 sometimes has wings as long as this. Unfortunately, the 

 Tern under discussion, which Mr. Lowe shot in Freetown 

 Harbour on the 5tli May, 1920, is an immature female, 

 apparently about eleven months old, with bill and feet black. 

 The primaries are very worn, and the shafts broken off at 

 the end ; and taking this fact into consideration the wing- 

 measurement of 233 mui. is remarkable. Had the wings not 

 been damaged, the measurement would have been somewhere 

 between 235-240 mm. The bird is in full moult, and has 

 attained its new tail-feathers and some of the secondaries. 

 K it is indeed a s[)ecinien of the Roseate Tern, its occurrence 

 so late as May in Sierra Leone is difficult to exphtin. The 

 bird is recorded from one or two localities on the East 

 African coast as far as Cape Town, but I know of no example 

 having Ijeen taken in West Africa. Mr. Willoughby Lowe 

 believes that it will })rove to be a resident and probably 

 distinct breeding-race, but until its breeding-oround is dis- 

 covered nothing further can be done. I would specially 

 draw the attention of any ornithologist who may be quartered 

 at Freetown to securing more specimens, and particularly 

 o£ ascertaining whether any Roseate Terns visit Freetown 

 Harbour. 



Mr. Lowe has reported the existence on Tasso Ishuul of a 

 fine Ground-Hornbill (^Bucorvus), which from his description 



t2 



