6 
CO LE O PTE R A. 
larvae are frequently met with in the dung of horfes, 
cows, &c. 
GENUS 6.—GYRINUS. 
Gy r in us Nat at or. 
The water-flea , belonging to this genus, is of a 
fhining black colour, is frequently feen in Handing 
water; it deferibes circles on the furface, by running 
on it with great fwiftnefs ; is difficult to catch, plung¬ 
ing into the water when attempted to be taken. 
The larvae are to be. met with together with thofe of 
the dytifeus, which they referable in form, though 
much lefs. 
i 
GENUS 7 .— BYRRHUS. 
The larvae are found upon plants, or in the bodies 
of half-decayed animals; they often undergo their 
metamorphofis in the bodies of preferved infefts, 
which they reduce to powder. 
The infeft is generally found upon flowers; hence 
is called anihrenus, 
GENUS 8.—SYLPHA. 
• ' *. K 
Many of the fylphae are found early in the fpring 
under the loofe bark of trees ; and they, as well as 
their larvae feed chiefly on the half-decayed carcafes 
of animals. 
GENUS 
