Mr. ( '. E. llcllumyr on a rare Jiittern. 57 



The fir.st speciinen (a) wears the rufous plumage, so well 

 described bj Sharpe, and agrees exaotlj witli plate ii. o£ 

 Dr. Forbes's article. The second {!>) is in the bhickish plumage 

 as represented on plate i., l. e. 



Quite reccntly the Tring Museum has received another 

 s[)ecinien of the blackish pba.se trom Surhiam, whicli is again 

 niarked " ? " by the collector. I think there can remain little 

 doubt that the dark-coloured birJs are the females and the 'rufous 

 ones the males. I niay add that Xatterer's specirnens are both 

 fully adult. As the localities at whicli fhey were captured 

 belong to the saine geographica! region, their specific identity 

 is established beyond doubt. 



In Mr. Tiothschild's collection at Tring there are tliree more 

 specirnens — two o£ the rufous and one of the blackish phase. 

 None of thetn has any locality. In structure and form the sexes 

 are quite alike, and the only difference between them consists 

 of the coloration. Perhaps the females average soniewhat 

 smaller. 



The specirnens examined have the folhnving measurenients: — • 



A. liufoiis phase (= mrdes). 



Wing. Tail. Tarsus. Rill, 

 mm, mm. mm. miu. 



1 . M US. Vindob. " c^ ' ad., " Cai^ara, 16th Feb. 



IH2H " (Natttrer) 140 o8 39 42 



2. jMu.s. Tring. ( c ) ad., South America .... 140 öT^ 39 — 



3. „ „ (J)jr., „ „ .... 139 - 39 37 



B. Blackish phase (^ = fei aal es) . 



4. Mus. Vindob. " $ " ad., " Engenho du Gama, 



9th July, 182ß" (iV^a«em-) 142 50 38 42 



5. Mus. Tring. " $ " ad., " Rijweg, near 



Paramaribo, Surinam, lOth Nov. 1904." 



IChunkoo coli.] 143 53 39 43 



6. Mus. Tring. ( 2 ), South America 137 57 37^ 43 



While the three males are very uniform araong themselves, 

 the series of the females presents rat her marked ditferences. 

 Natterer's bird and the one from Surinam have the butf lovver 

 parts only sparingly f reckled and striped with blackish, whereas 

 in No. ?) the whole fore-neck and breast are covered with broad, 



VOL. XIII. F 



