146 SOME CHINESE VERTEBRATES. 
COLYMBIDAE. 
CoLYMBUS cRISTATUS Linné. 
One male, in winter plumage, Chachianghsien, western Szechwan, Decem- 
ber 7, 1908. 
TACHYBAPTUS RUFICOLLIS POGGEI (Reichenow). 
Two adult females, Ichang, Hupeh, September, and October. 
The collection of the Museum of Comparative Zodlogy contains also two 
fine adults, 7 and ¢°, from Pekin. These specimens indicate that the slight 
characters that distinguish the Chinese form from true T. ruficollis (Pallas) 
and 7’. r. philippensis (Bonnaterre) are not wholly constant, and the subspecies 
is certainly not a strongly marked one. 
LARIDAE. 
STERNA SINENSIS Gmelin. 
Seven specimens, adults of both sexes, Luchow, and Kiating, Szechwan, 
April, and May. 
Larus RIDIBUNDUS Linné. 
Four specimens, three adults of both sexes in winter plumage and one 
immature female, Ichang, and Changhsien, Hupeh, February, and March. 
Larus AFFINis Reinhardt. 
One female, immature, in probably its second year, Chachianghsien, western 
Szechwan, December 7, 1908. 
Larus canus Linné. 
One immature female, Yachow, western Szechwan, December 5, 1908. 
CHARADRIIDAE. 
MiIcROSARCOPS CINEREUS (Blyth). 
Three specimens, two adult females and a youngish male, Ichang, Hupeh, 
March, and October. 
VANELLUS VANELLUS (Linné). 
Five specimens, both sexes, Ichang, Hupeh and Chiachianghsien, Kiating, 
Kungyahsien, and Omeihsien, Szechwan, autumn, and winter. 
