[ 32i ] 

 P. S. 



SINCE I fent to you my .very long letter on the 

 migration of birds, I have had an opportunity of exa- 

 mining the .-" Planches Enluminees," which are faid 

 to be publifhed under M. de BufTon's infpection, 

 and which feem to afford a demonfiration of M. 

 Adanfon's inaccuracy in fuppofing either the roller, or 

 fwallows, which he caught in his fhip, near the coaft 

 of Senegal, to be the fame with thole of Europe. 



In the 8 th of thefe plates, there is a coloured 

 figure of a bird, called le rollier d'Angola, which 

 agrees exactly with M. Adanfon's defcriptio'n * ; but 

 he truiled too much to his memory, when he pro- 

 nounced it to be the fame with the Garrulus Argen- 

 toratenfis of Willughby, and therefore fuppofed it 

 to be on its paffage to Europe. 



This bird hath, indeed, in many refpects, a very 

 flrong refemblance to the common roller of Europe, 

 which is reprefented alio in the Planches Enlu- 

 minees, plate 486 y but it differs mod materially 

 in the length of the tw 7 o exterior feathers of the 

 tail, as well as in the colour of the neck, which 

 in the African roller is of a moil bright green, and 

 in the European of rather a dull blue. 



In the 310th plate, there is likewife a coloured 

 reprefentation of the " Hirondelle a ventre roux du 

 " Senegal, 5 ' which fpecimen was poffibly furnifhed 

 by Mom*. Adanfon himfelf. 



* Voysge au Senegal, p. 15. There is alfo another African 

 bird, reprTented in the " Planches Enluminees," which might 

 very eafily, en a hafty infpec/Lion, be miftaken for the Garrulus 

 Argeniora'teniis, viz. the Gucpier a longue queue du Sene<ral. 

 PI. Enl: P. 3 «4- 



The roller of Angola is alio engraved by B/ifton, T, it. 

 P*- 7- 



Vol. LXH. T t It 



