NATURAL HISTORY OF SELBORNE. 



LETTER XXXII. 



TO THE SAME. 



SELBORNE, October zgtA, 1770. 



DEAR SIR, After an ineffectual search in Linnaeus, Brisson, &c., 

 I begin to suspect that I discern my brother's hirundo hyberna "in 



ROCK-SWALLOW. 



Scopoli's new-discovered hirundo rupestris, p. 167. His description 

 of "Supra murina, subtus albida ; rectrices maculd ovali albd in 



