THE ELY. 
$33 
Genus Til. Mufca. He Fly, 
This numerous tribe is charadei-ifed by that foft and 
flcfhy probofcis which forms the mouth, and by being 
deftitute of palpi. There are about an hundred and 
thirty different fpecies of flies already known to natural- 
ifls, who have divided them into two. grand felons ; 
thofe with filiated and Ample antenna;, and thole whole 
antennas are furniflied with a lateral hair or feather . 
Nothing fo clearly demonftrates the imperfe&ion of 
the fcience of entyinology as the fmall number of flies 
that have been hitherto defcribed by naturalifts. The 
Syftem of Nature in its laft Hate of enlargement, was 
Wed to contain the moft accurate and complete enu- 
meration of infeas that has yet been publiflied: Mr. 
Harris however, in his Expofilion of the Enghjb infefts, 
deferihes a greater number of flies indigenous in this 
country, than the Swedi/b naturalift had difeovered on 
the whole face of the globe. England is at the fame 
time far from being the moll produce country of tbefe 
animals. In Spain, they were formerly fo numerous, 
that the fly-catclier, we are told, was not only a prok ion, 
but a. number of men were commiffioned by government 
to give chace to thefe troublefome invaders. . In a not 
climates they multiply to a degree almoft intolerable 
and 
» Syft. Nat- Ord. VI. Gen. iii. 
