Genus II. COTILE. 



Type. 



CUvicola, T. Porster, Syn. Cat. Brit. B. p. 55 (1817) C. riparia. 



Cotile, Boie, Isis, 1822, p. 550 C. riparia. 



Range. Breeding in the northern parts of both the Okl and New Workls. The migratory species 

 wintering in South America, as well as in India and Africa, where there are also resident 

 species. 



The differences in nesting-liabits and the colour of the eggs between the Sand-IMartins 

 and the Bock-Martins, which we have included under the one heading of Cotile, 

 appear to us, on further consideration, to deserve generic distinction. The Common 

 Sand-Martin {Cotile riparia), with its allies C. diluta and C. shelleyi, has a little 

 tuft of feathers at the base of the hinder tarsus, showing an affinity to the House- 

 Martins {Chelidon). C. congica, on the other hand, has no tarsal tuft of feathers, but 

 retains the band on the fore neck, which makes it an intermediate species between 

 the section containing Cotile riparia and C. shelleyi, and the little C. sinensis and its 

 African allies, which have no throat-band. To the genus Cotile we shall refer all the 

 Bank-Martins, which tunnel holes for their nests and lay white eggs, while to the genus 

 BiUis Avill be referred the Bock- Martins, which lay spotted eggs, like the Swallows, and 

 have also the Swallow-like character of a spotted tail. Eor those ornithologists who 

 adopt the name CUvicola the following species will have to be included : — CUcicola 

 riimria, C. diluta, C. shelleyi, C. cincta, C. congica, C paludicola, C. minor, C. cowani, 

 and C. sinensis. 



Clavis specierum. 



a. Fascicula jjlumosa ad finem tarsi postici posita : torques pcctoralis brunnca. 



a'. Major : ala 4-25-4.-35 poll. 



a". Torques pcctoralis obvia, saturate brunnea 1. njiana, y. I."> . 



b". Torques pcctoralis vix obvia, pallide brunnca ~. (Iihilii,y. (l.'i. 



b'. Minor ; ala 3'55 poll 3. shcllciji, p. C". . 



b. Fascicula plumosa ad finem tarsi postici nulla. 



c'. Tonjucs pcctoralis brunnca. 



a". Major: subalaribus all)is : ala TrO poll I- rhuia, p. «',7 . 



b". Minor : subalaribus brunncis ■">• ronnini. ]>. 7 I . 



(!. i/(iliii/iri/l(i , 11. 7'' . 



I , . iHiiKir, |>. II. 



d'. Tortiucs pcctoralis nulla ■, ,, . .,, 



^ ' IS. rinrmii, ji. < ;* . 



\\). niiiiiisis, 11. Si . 



