diptera, 
69 
Tab anus Pluvialis * 
The moft common fpecies; length, 4 lines, of an 
alhen grey, has very fine eyes. 
All the genus accord in their way of life, but 
differ in fize and colour. 
They have been named burr el or whame-Jlies : by 
feme Englifh authors. 
GENUS 5.—CULEX, GNAT. 
The larvae of the culices are very frequent in 
ftanding waters.; their bodies are compofed of nine 
fegments, which diminifh in fize and length from 
the head towards the extremity of the body ; the laft 
of thefe feclions is furnifhed with a kind of ftigmata, 
through which the larva breathes, frequently riling 
for that purpofe to the top of the water. 
The head of the chryfalis is fo much bent under 
the breaft, that the thorax appears to be the moft 
advanced part of the body ; the ftigma-tae are placed 
upon the back of the thorax, the fegments of the 
abdomen diminifh in fize towards the extremity, the 
laft terminates in a kind of flat tail or fin, by mean 
of which the infect fwims or moves itfelf in the 
water. 
The culices generally frequent woods and watery 
places ; they are known by the name of midges. 
It 
