410 Mr. H. E. Dresser's Notes on 



established on a single female specimen from Costa Rica. 

 Arce has more recently forwarded a pair from Veragua^ by 

 which we find that the male differs in having the nape and 

 lower back strongly overnin with golden yellow. 



Of the rare Calliste hartlaubi (originally described by me 

 as a Dacnis (!), cf. Ibis, 1863, p, 452), Messrs. Salvin and 

 Godman have lately obtained a single skin, of the ordinary 

 " Bogota " make. They have likewise been so fortunate as 

 to secure a specimen of the Calliste cucullata of Swainson, 

 peculiar, as I believe, to Western Venezuela, of which modern 

 examples are very scarce. 



Lastly I may call attention to M. Dubois's recently pub- 

 lished memoir on the variability of certain species of Calliste*, 

 and remark that the question, as to what amount of difference 

 is sufficient to entitle a local form to specific rank, must 

 always remain an open one. With some of M. Dubois's 

 unifications I should be disposed to concur; for instance, I 

 have already rejoined C. cyanescens to C. nigriviridis ; but 

 I could not agree to consider such a well-marked form as C. 

 yeni the same as C. tatao, or to unite under one name C. 

 gyrola, C. gyroloides, and C. desmaresti. 



XLI. — Notes on Severtzoff's 'Fauna of Turkestan' [Turkes- 

 tanskie Jevotnie). By H. E. Dresser. 



[Continued from p. 330, and concluded.] 



312. Machetes pugnax (L.) ; Severtzoff, p. 69. 

 Horizontal range. Occurs on passage in all four districts. 

 Vertical range. Occurs on passage in districts 1 and 2. 



313. Tringa minuta, Leisl. ; Severtzoff, p. 69. 

 Horizontal range. Occurs on passage in districts I., II., 



and III. 



Vertical range. Occurs on passage in districts 1 and 2. 



* Remarques sur la variabilite de certaiues especes du genre CaUisfe, 

 par M. Alph. Dubois, coiiservateur au Musee royal d'histoire naturelle de 

 Belgique. Bull, Acad. Roy. desSci. Belpique, 2me ser. t. xxxviii. (1874) 

 p. 124. 



