632 Mr. J. D. D. La Touclie on the [Ibis, 



of February and throughout IVIarch to tlie end of April, and 

 again in immense flocks in October and November. Inland, 

 nest-building begins at the beginning of April. A rooker}^ 

 Avhich at the beginning of May was fully inhabited, was 

 found deserted on the following 19th of June. In 1914. the 

 Rooks built at the port itself for the first time. The nests 

 were begun about the 15th of April, and the last were 

 mostly finished about the 6th of May. In 1915 the birds 

 attempted to build on the 3rd of May, but the first nests 

 being destroyed, they left and did not reappear. During 

 the tw^o following years, large rookeries were successfully 

 established in two or three spots at the port. 



4. CorvTis dauricus Pallas. 

 Lycos dauricns D. & O. p. 370. 

 Corvus dauricus La T. p. 567. 



The Daurian Jackdaw^ a})pears at Chinwangtao towards 

 the end of February or beginning of March, and may be 

 seen mio-rating throughout the latter month. It passes 

 asain in autumn Avith the Rooks in great numbers. 



5. Corvus neglectus Schlegel. 

 Lycos neijhctus D. & O. p. 370. 

 Corvus neylectas La T. p. 567. 



Swinhoe^s Jackdaw passes commonly from the middle of 

 March until May, and apparently tarries occasionally till the 

 end of that month, as a party of ten were observed on the 

 25th of May, 1913. This confirms Pere David's observa- 

 tions. I do not know whether any breed in the district. 

 In autumn this Jackdaw is seen mixed with the flocks of 

 Daurian Jackdaws and Rooks. During both seasons it is 

 much less common than the pied bird, but flocks entirely 

 composed of Black Jackdaws are not at all unusual. Hybrids 

 are common. The wing-measurements in my series of 

 Jackdaws are as follows : — 



C. dauricus ^ 8-83 - 9--1-3, ? 8-45 - 900 in . 



C. neglectus ^^ 8-71 -8-93, ?8-34-8-65 



Hybrids c?9-00&9-35, ? 8 50 - 8-85 



