OF NATURAL HISTORY. 103 



known fly, and frequents rivers, lakes, pools, and flngnatlng 

 waters, in which the females depolit their eggs. Their mode 

 of generating is lingular. DiflFerent fpecies of them appear 

 from the beginning of fummer to the middle of autumn. 

 They generally fly in pairs and in a flraight line, the male pur- 

 fuing the female. The organs of the male are iituated in his 

 breaft : When he overtakes her, with the forceps in his tail 

 he lays hold of her by the neck, while fhe, by an inflinctive 

 impulfe, makes the lower end of her body approach the male 

 org;ins. In this united fltuation they form a kind of ring, 

 have the appearance of a double animal, and fly along till 

 the purpofe is accomplilhed. Under the fame order is com- 

 prehended the phryganea, or fpriftg-fly : The larvae or cater- 

 pillars of this genus live in the water, and are covered with 

 a filken tube. They have a very Angular afpefl ; for, by 

 means of a gluten, they attach to the tubes in which they are 

 inclofed fmall pieces of wood, fand, gravel, leaves of plants, 

 and not unfrequently live teftaceous animals, all of which 

 they drag along with them. They are very commonly found 

 in falads of the water-crefs ; and, as they are often entirely 

 covered v;ith green leaves, they have the appearance of ani- 

 mated plants. They are in great requefl: among fifhermen, 

 by whom they are diftinguifhed by the name ofjlcne, or cod- 

 bait. The fly, or perfect infetSl, frequents running waters, 

 in which the females depofit their eggs. 



Thefft/j order is termed /jymenoptera. In general, the in- 

 fedis belonging to this order have four membranaceous and 

 naked wings. In fome of the genera, however, the neuters, 

 and, in others, the males, or even the females, have no wings. 

 Their tails except in the male fex, are armed with a fting. — 

 The female of the cyriips, an infe(51: belonging to this order, 

 inferts her eggs into the leaves of the oak,and the caterpillars 

 produced from them giv- rife to the galls employed in 

 the compofition of ink. This order likewife includes the 



