160 BULLETIN 15 3, UNITED STATES NATIONAL MUSEUM 



informs me that he is of the same opinion. The Madagascan form 

 hifrontatus is very well marked, but is merely a race of tricollaris. 



KEY TO THE AFRICAN SPECIES AND RACES OF THE AFROXYECHUS GROUP 



A\ No white on forehead or forward part of crown forbesi. 



A^ White present on forehead or forward part of crown. 



B\ Forehead entirely white (to top of bill) tricollaris, 



Bl Forehead not entirely white but dark gray above bill, then 



a white band on top bifrontatus. 



The first species, forbesi is west African in range, being known 

 to occur from Senegal and Cameroon to Bumba, central Belgian 

 Congo; hifrontatus is confined to Madagascar; while trlcollarls is 

 found throughout eastern Africa from the Sahara and the Red Sea 

 to the Cape Province, westward across Rhodesia to Angola, and 

 north, on the west coast, to the mouth of the Congo. 



Two males from British Somaliland are slightly paler and smaller 

 tlian a series from Ethiopia, Kenya Colony, and Tanganyika Terri- 

 tory. They are slightly lighter gray on the cheeks and have the 

 white forehead patch somewhat more extensive. However, two 

 unsexed, worn skins labeled " South Africa " (E. L. Layard collec- 

 tion) are even smaller. The following wing measurements give some 

 idea of the variations in this species. The largest wing is 114 

 millimeters, a female from Kenya Colony; the smallest 105 milli- 

 • meters, an unsexed South African bird. Two males from British 

 Somaliland have wing lengths of 105.5, and 107 millimeters; three 

 males from Ethiopia, 110, 110, and 111, respectively; 6 males from 

 Kenya Colony 107, 108.5, 109.5, 110, 110.5, and 112, and four females 

 from the same country, 106, 109.5, 110, and 114 millimeters, respec- 

 tively; a male from Tanganyika Territory, 108, and a female, 110 

 millimeters ; a female from South Africa 107, while 2 unsexed South 

 African birds measure 105 millimeters each. 



Aside from the actual specimens obtained, this species was met with 

 at the Abaya Lakes, March 19, 2 birds seen; Gato River, March 29 

 to May 17, 4 noted ; and Lake Rudolf, 5-8, when 50 were seen. 



SQUATAROLA SQUATAROLA (Linnaeus) 



Tringa squatarola Linnaeus, Syst. Nat., ed. 10, vol. 1, p. 149, 1758; Europe; 

 restricted type locality, Sweden. 



Sjieciviens collected : 



Male, Djibouti, French Somaliland, November 22, 1911. 



The present species has been divided into three races, all of which 

 are practically indistinguishable. This plover is such a notable wan- 

 derer and migrant that it is absolutely essential to restrict subspe- 

 cific study to series of hreeding specimens from different localities. 



