478 THEPHILOSOPHY 



not improperly received the appellation of the no£lurnal fwalloixj. 

 The goat-fucker ftays only a fliort time in Britain. It appears not 

 till about the end of May, and retires in the middle of Auguft. It 

 lays its eggs, which are commonly two, and fometimes three, on the 

 bare ground. 



To give catalogues of the numerous birds of paflage which fre- 

 quent this ifland, as well as other countries, and to mark the times 

 of their arrival and departure, would be deviating entirely from our 

 plan. For circumftances of this kind, the curious may confult 

 Gatefby, Klein, Linnaei Amoenitates Academicae, White, &c. But, 

 as the periodical appearance and difappearance of the fwallow-tribe 

 have given rife to different theories and opinions, we fhall briefly relate 

 thofe opinions, and conclude with fome remarks on migration in 

 general. 



Herodotus and Profper Alpinus mention one fpecics of fwallow 

 ■which refides in Egypt during the whole year *; and Mr Loten, 

 late governour of Ceylon, affured Mr Pennant, that thofe of Java 

 never remove. If thefe be excepted, all the other known kinds re- 

 treat or migrate periodically. Swallows migrate from almoft every 

 climate. They remove from Norway f , from North America {. 

 from Kamtfchatka §, from the temperate parts of Europe, from 

 Aleppo II, and from Jamaica **. »•■ 



Concerning the periodical appearance and difappearance of fwal- 

 lows, there are three opinions adopted by different naturalifts. The 



firft 



* Profp. Alp. torn. i. pag. 198. 



\ Pontopp. Hift. Norw. ii. 98. 



X Catefby's Carol, v. i.'pag. 51. App,. 8. 



J Hift. Kamtfchatka, pag. 162. 



tl Ruflel's Alep. pag. 70. • ., 4 



«* Phil. Tranf. N* 36. 



