IMIGKATION. 35 



rous, we can reason from analogy on safer grounds with 

 regard to the remainder. 



The swallow, about whose migrations so many idle 

 stories have been propagated and believed, departs from 

 Scotland about the end of September, and from England 

 about the middle of October. In the latter month M. 

 ADANSON observed them on the shores of Africa after 

 their migrations from Europe. He informs us, however, 

 that they do not build their nests in that country, but only 

 come to spend the winter. M. PRELONC has not only con- 

 firmed the observations of ADANSON, in reference to swal- 

 lows, but has stated, at the same time, that the yellow and 

 grey wagtails visit Senegal at the beginning of winter. The 

 former (Motacillajlava) is well known as one of our sum- 

 mer visitants *. The nightingale departs from England 

 about the beginning of October, and from the other parts 

 of Europe about the same period. During the winter sea- 

 son it is found in abundance in Lower Egypt, among the 

 thickest coverts, in different parts of the Delta. These 

 birds do not breed in that country, and to the inhabitants 

 are merely winter birds of passage. They arrive in au- 

 tumn and depart in spring, and at the time of migration 

 are plentiful in the islands of the Archipelago. The quail 

 is another of our summer guests, which has been traced to 



* " J'ai observe, comme AOANSOW, que nos hirondelles et nos ber- 

 geronnettes arrivoient dans la zone torride huit ou dix jours apres Tepoque 

 ou elles quittent nos climats. En 1788, j'ai vu les bergeronnettes du pi-in- 

 terns et les bergeronnettes grises arriver a Goree le 14. Septembre. ADAN- 

 SON dit qu'il a vu arrive* les hirondelles au Senegal 9. Octobre ; or je me 

 rapelle qu'elles quittent le department des Hautes Alpes vers la fin de Sep- 

 tembre, ce qui s'accorde parfaitement," " Memoir sur les lies de Goree et 

 du Senegal, par le cit. PREIONO-" Annales de Ckemie, t. xviii, p. 272, 



