458 THE NATUEAL HISTORT EETIEW. 



the present volume, which treats especially of Amoorland and the 

 adjoining districts of Mongolia and Mantchuria, traversed by our 

 author during his four years' journeyings, of which an outline has 

 been already given in our former notice. 



Herr Eadde commences his volume with a general catalogue of 

 the Birds of South-eastern Siberia, giving in parallel columns the 

 different dates of the earliest arrival of each species in the Eastern 

 Sajan, Baikal, Dauria, the Upper and Lower Amur, and the 

 Stanowoj Mountains, as recorded by himself and other observers. 

 The list embraces 328 different species, and an additional supplemen- 

 tary catalogue contains the names of 40 others, which also probably 

 belong to this Avifauna, although of more or less rarity. These 368 

 species, which may be taken as a tolerably accurate estimate of the 

 Ornis of this region as far as we are at present acquainted with it, be- 

 long to the following orders, according to Herr Eadde's arrangement. 



368 



We now proceed to give an abstract of Herr Eadde's general 

 remarks on the 33 families of birds to which he refers these 368 

 species — at the same time introducing a few criticisms concerning 

 his nomenclature, arrangement, and other points. 



The Vultures (Vulturidae) have only one representative in South- 

 eastern Siberia — namely, the Lammergeier of the Alps, Gypaetus 

 larhatus — which indeed is a very aberrant form of this family, if it 

 belongs to it at all. Herr Eadde remarks that this bird is moving 

 southwards in Inner Asia, and it is not now found in Dauria, where it 

 was formerly met with. 



The Talconidse of South-eastern Siberia are 22 in number — mostly 

 European species — partly of circumpolar distribution (such as 

 ^' QV^lf^^c^) — partly composed of South-European species — such as 

 Aquila ncevia, Milviis niger and Bioteo ferox, which push forward in a 

 north-easterly direction into the high steppes of Mongolia. A well- 

 marked East Indian form is also present in the shape of Circus 

 onelanoleucus, which is a summer visitant to the middle Amoor 

 Valley, and on the Onon and Argunj. Herr Eadde's Aquila ncevia^ 

 which is stated to be very abundant on the high steppes of Dauria, 

 and in fact the most common species of eagle in Eastern Siberia is 



