C 2 ° ] 



Thus refted the matter for that time ; but my curiofity being 

 roufed by the ftrangenefs of the incident, I examined large manes 

 of ftone, wherever Ifaw them, this laft year ; and happening to be in 

 Buckinehamfhire in July, I found the whole myftery explained. 



Several large ftones that flood in water at their bottom, tho' 

 dry enough above, were covered with grey, ftony tubules of this 

 kind; and about one of thefe maffes, ort the evening of the 18th of 

 July, I found more than fifty, of the Fly, to the Worm of which 

 they owed their origin. 'Tis a very pretty creature, and in all 

 refpects of the Day-Fly kind. 



Its Head is hoary, and of a ftrong fine green, with a black round 



fpot on its centre, mining at the fummit. 

 The Eyes are black as jet. 

 The Studs are brown. 



The Antlers are fcarlet, long, thruft (trait forward, and ufually crofs'd. 

 The Mouth is dufky. 



Its Trunk is of a lovely green, and is join'd to the body by a kind 



of neck, which is alfo of a velvety green. 

 The Back is beautifully variegated with ftreaks and dots of gold. 

 The Scutcheon is of a lighter green. 



Its Body is thick, and green, and is connected to the Trunk almoft 

 without a divifion. 



Its Legs are of a pale brown* 



Its Wings of the fame pearly grey with the preceding; but ele- 

 gantly vein'd, and clouded with a pale blue, and a light brown. 



"The Bristles are amber- colour. 



I believe this Fly lives no longer than one evening in its win^'d 

 ftate ^ the Females, among thofe I faw, were very bufily depofiting 

 eggs in all the cracks and crevices of the ftones. The Worms 

 hatched from thefe, make the ftone tubules for themfelves, and pro- 

 bably live in them one or two years. 



INSECTS 



