1922.] Characters in some Charadribie (lencra. 483 



In the lueaiiwliile it is ;i very noteworthv and I think 

 highly interesting fact, that we apparently Hnd an almost 

 precisely similar condition oh' things in another adjacent 

 group of Plovers. I refer to the " Ringed-Plover Asso- 

 ciation." By this association I mean a certain restricted 

 group of the old heterogeneous collection comprised under 

 the genus ^'Egialitis (dim). This restricted group of 

 Ringed Plovers may be divided into two subgroups to 

 which the generic names (liaradr'nis and Leucopoliiis have 

 been applied. While by no means generally recognized, 

 each of these genera has been characterised by well-marked 

 superficial characters connected with the form of tin; bill, 

 legs, and feet *. 



In the genus ( 'haradrius may bo included such forms as : 



( haradrius hiaticiila, 

 ,, dubiiis, 



„ 2^lackh(s, 

 „ melodus, 



„ semi fiidmaf IIS, 



with two raiher aberrant or specialised forn^s. <'. racullatus 

 and ( '. hiciwfus. 



In the genus Leacopolins we may include : 



LcuropoHus alfiA'andrinus, 



,, nifiosus, 



„ peroiii, 



„ ra/icapillus, 



„ ma7'ginatus, 



„ coUaris, 



„ vemisfus. 



Now, just as in the case of Squatarola and Plurialis, both 

 the two genei'a, < haradrius and Leucopoliiis, are, as regards 

 adult examples of the various species, linked together by 

 possessing a similar well-marked colour-pattern, too well 



* From an examination of sliins, IMossrs. Mathews and tredale have 

 insisted on these generii" ditfereiices, and osteological cliaracters prove 

 them to have been thoroughly justified. 



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