1922.] Corythui ni.s lc'Uco;i;ist(M" in. the Camevoou. 443 



Gal)ooii : Lake Erzanga, 1 c^ ; '"Gaboon," 2 without sex. 



.Enclave! of (Jabinda : Ijandana, 1 ^ . 



This race is named in honour of Mr. G. L. Bates, by 

 whom wore collecteil eleven ot" the twenty-five specimens 

 I have examined. 



llie Secotnl known. S/iecimen of Leopold s /\in(//isher. 



A female example taken near Avakubi, Ituri District, by 

 the Amei-ican Museum (jongo Expedition, was identified as 

 an adult of Ispidina leopoldi Dubois, of which the type-speci- 

 men from the region of iiake Leopold IL was certainly 

 innnuture. The light tip of the bill, as shown in the coloured 

 plate, would alone be an indication of this in any of the 

 related species. 



Last December 1 had an opportunity of comparing our 

 specimen with Dubois' type in the Congo JMuseum, at 

 Tervueren, and of noting the agreement in pattern and, 

 indeed, everything not plainly dependent on the immature 

 condition of the tvpe. The lighter blue back of the latter 

 and its paler rufous flanks are accounted for by this difference 

 in age. It is worthy of mention that the older bird, although 

 the tij) of its bill is worn as though from digging its nest 

 (for the ovary was slightly enlarged), has the bill largely 

 brownish and not light reil as in adults of L'^jiidina pirta or 

 Cor//tho7'nis cnstata . 



Li the case of an adult male of C. /. haleii from Lake 

 Erzanga, Gaboon, in Lord iiothschild's museum, Ansorge 

 described the bill as '" reddish black '^ on the ujiper mandible, 

 " bui'nt sienna" on the lower; and so the Gaboon bird 

 perhaps approaches that of the Upper Congo in this res[)ect. 

 This same example has possibly a slightly narrower, rufous, 

 su[)erciliary line than C^ameroon specimens, yet it is still very 

 unlike C. leopoldi. 



Unless intergradation proves to take place in the region 

 of the Sanga River, Corythornis leopoldi may be regarded 

 as a distinct species, differing from C leucoyaster in its dark 

 blue superiiliar}' line, as shown in Dubois^s plate, also in the 



