230 Mr. H. E. Dresser— The late Dr. Halters 



the middle of June one could observe its breeding-evolutions. 

 The male rises with quivering wings about ten feet above the 

 ground, at the same time uttering a harsh note, trrr-trrr-trrr, 

 and then descends. The nests, found late in June and early 

 in July, contained four eggs each in three cases and three 

 eggs in one case. The nest was placed, unlike that of the 

 other Waders, which affected the grass-covered portions of the 

 Tundra, between bare clay lumps on moss, and consisted of 

 a shallow depression lined with a few dry straws and a white 

 tangle. In two cases the male, and in two the female, was 

 incubating. On the 16/29 July, when the young in down 

 were taken, the male shewed anxiety, but the female was 

 not seen. During the breeding-season some of these birds 

 wandered about in small flocks. This species remained until 

 the end of August. 



Desc?'i/jtion of the Eygs o/Calidris arenaria. 



No. 75. Blunt pyriform, fine-grained, with a faint gloss. 

 Ground-colour pale yellowish white, with a very pale greenish 

 tinge and somewhat marked with small yellowish-brown 

 and dark brown spots ; a few indistinct light violet-grey 

 markings ; at the larger end a few blackish dots and streaks. 



The measurements of four incubated eggs ("^ '. r— ) are : — 



a. 35-8x24-9 mm. 



b. 33-8x24-7 „ 



c. 36-6 x 24*4 „ 

 (I. 341x24-9 „ 



Xo. 7(J. Four slightly incubated eggs ( "^, '. . ) : — 

 e. 342 x 25-9 mm. 



/. 34 - l X 26*1 ,, lleserublc No. 75, but the spots 



g. 33*1 x 24*4 ,, [ are larger and more scattered. 



h. 30-6x25-5 „ J 



Xo. 87. Three slightly incubated eggs ( ,., , , ) : — 



/'. 37*5 x 24*7 mm. ] Resemble No. 75, but the spots 



j. 36'8 X 24*2 „ are fewer and closer at the 



k. 38-2x24-7 „ J larger end. 



