S^O DIPTERA, 
more severe, and the inftammation more 
lasting than that of our gnats ; but even 
the coldest climates are not exempt from 
them. The Laplanders are so much in- 
fested by these winged tormentors, that 
the poor natives are often obliged to 
sleep surrounded by smoke, in order to 
keep them off. 
The culex is thus described. Antennae 
of the male feathered — mouth armed 
with piercers, contained in a flexible 
sheath — feelers two. Culex pipiens, or 
common gnat, grey — abdomen of eight 
segments. 
