1918.] Under Wing-Coverts of Birds. 559 



Median under coverts present on the cubitus with one at 

 the carpal joint ; overlap contrary. These are not large, 

 and tlie absence of visible major coverts behind them leaves 

 the remiges bare for most of their length. 



Eurystomiis g^duris. Four specimens examined, Nos. 5764, 

 5772, 5944 & 5950. 



Major under coverts complete, if we include the rudi- 

 mentary ones on the cubitus, which are scarcely more than 

 down-feathers, though they have distinct shafts ; eleven on 

 the manus, the 11th being present even when, as in some 

 of the specimens, the remicle was not found, and larger 

 thati the remicle when that was present. Wing diastataxic. 

 The manual major coverts conforming in overlap excepting 

 on the proximal portion (half or less) of the manus, where 

 tlie overlap is contrary. 



Median under coverts present on the cubitus, with one at 

 the carpal joint ; overlap contrary. 



Ceryle maxima. Two specimens examined, Nos. 5626 & 

 5959. 



Major under coverts present on the manus, number not 

 noted (remiges eleven), but on the cubitus reduced to 

 rudimentary feathers 20 mm. long, with slender shafts and 

 weak downy barbs. Wing diastataxic, there being two of 

 the rudimentary under coverts, as well as two of the large 

 upper ones, between the 4th and 5th cubital remiges. 

 Overlap of the manual major coverts conforming on half 

 or more of the hand, hut contrary on the proximal part 

 (half or less). The major under coverts are coloured like 

 the remiges. 



Median under coverts present on the cubitus, with one 

 at the carpal joint; overlap contrary. These are red like 

 the minor coverts, and are so small as to be almost or quite 

 hidden by them. 



In this bird the reversed under coverts on the proximal 

 part of the manus, though they have the same overlap as 

 the median coverts next to them on the cubitus, do not 



