96 THE NATURAL HISTORY 



be distinguished ; tlieir livers, Icidneys, and hearts, were 

 large, and their bowels covered with fat. They weighed 

 each, when entire, full one ounce and one drachm. 

 Within the ear there was somewhat of a peculiar structure 

 that I did not understand perfectly ; but refer it to the 

 observation of the curious anatomist. These creatures 

 send forth a very rancid and offensive smell. 



LETTER XXXVII 



Seaborne, 1771. 

 Dear Sir, 



On the twelfth of July I had a fair opportunity of con- 

 templating the motions of the caprimulgus, or fern-owl, 

 as it was plajdng round a large oak that swarmed with 

 scarabasi solstiliales, or fern-chafers. The powers of its 

 wing were wonderful, exceeding, if possible, the various 

 evolutions and quick turns of the swallow genus. But 

 the circumstance that pleased me most was that I saw it 

 distinctly, more than once, put out its short leg while on 

 the wing, and, by a bend of the head, deliver somewhat 

 into its mouth. If it takes any part of its prey with its 

 foot, as I have now the greatest reason to suppose it does 

 these chafers, I no longer wonder at the use of its middle 

 toe, which is curiously furnished with a serrated claw. 



Swallows and martins, the bulk of them, I mean, have 

 forsaken us sooner this year than usual ; for, on Sep- 

 tember the twenty-second, they rendezvoused in a neigh- 

 bour's walnut-tree, where it seemed probable they had 

 taken up their lodging for the night. At the dawn of the 

 day, which was foggy, they arose all together in infinite 

 numbers, occasioning such a rushing from the strokes of 

 their wings against the hazy air, as might be heard to a 



