SUCKING INSECTS. 



201 



{Cidicidce) are confounded under the common 

 names of gnat and musquito, as if there were only 

 one or two species ; whereas Mr. Stephens has 

 enumerated twenty-two species of the genera Culex 

 and Anopheles, found in Britain alone*; and hence 

 it is probable, the foreign mosquitoes are also of 

 several species, though to common observers they 

 do not appear to differ from the common gnat 

 (Culex jJipieJis), 



'^ac,](.eT o( the cleg (^HcPinatopota pluvialis) : a, cleg, natural size; i, part 

 of the head magnified ; c, magnified still more, showing the facetted eye, 

 the short antennae, and the sucker unsheathed; d, the lancets, &c. of the 

 sucker, separated to show their structure. 



* Catalogue, ii. p. 232, 233 ; and Zool. Journ. i. 452, ill. 500, 



