420 
Piila. 
INSECTS. COLEOPTERA. 45. Hydrophilus 
Braffy fhining: fliells violet-black with yellowilh 
Inhabits Ural, Pall. It, Append, ii, 46, 
Unzarict?. green ; beneath, front and fidcs of the thora 
goW. ■ g.. 
Inhabits Hungary, Scopol. Ann. Hiji. Nat. 5./. I04' ^ 
Lefs than B. rulUca. Shells rounded at the tip. 
’‘^Granularis Above clouded bj-affy, beneath black : antennas clavat^' 
Inhabits Europe, is probably, ijot of this genus, 
bize of a flea: thorax with 5 grooves -.^Jliclls ftriate. 
At 
45. HYDROPHILUS. AntenncE clavate, 
club perfoliate : Jeelers 4, 
hind-legs formed for fwimming, 
on the inner fide, and nearly unaii^ 
with claws. 
The Infefts of this and the next genus Dytijeus are ii’ 
f Pkeus, 
of ponds and Itagnant wateis, where they iwim 
dexterity turning round with great velocity ; they Id 
by night in feareh of other waters; tiie males are T 
from the females, by having a horny concave flap or 
the fire-tegs, near the fetting on of the feet ; the *p)lk. 
peculiarly fitted for their aquatic fituation, being J 
on the inner-fide with a feries of long and clofe-fet oP 
refembling a fin, by which they are enabled to 1"', jC* 
great cafe and celerity : the larvee remain about 2^t|| 
before they change into pujat, forming a convenient 
fecreting thcmfelves in lome bank; are extremely 
and deftruffive to the more tender aqilatic infeOfs, 
young filli, which they ravenoufly feize with the 
jaws, and deftroy by fucking out their juice. 
long fp>"^ %/}''■ 
Glolfy-black : fternum channelled, with a 
jng backwards, Jp'ulfi 
Ixihibils, Europe. Naturalijls Mifcelhxny. \\\\. plate. 
The lar-va appears to have the legs feated on the 
^ body near the back, but this is occafioned by 
fliape and pofition of the legs : the Jhnale fpins a flatt' 1** 
lar kind of 'web, terminated by a long taperring 
which the young cfcape, as foon as they are hatched. 
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