60 Ashmolean Natural History Soctety of Oxfordshire. 
FAMILY Gyrinide. 
) These two species are to be seen everywhere in 
Gyrinus natator, Scop. summer on the surface of standing or 
G. opacus, Sahlb. ‘ running water, the latter being the com- 
) moner of the two. 
Famity Hydrophilide. 
Hydrobius fuscipes, L. In standing water; common. The var. ? 
picicrus, Thoms., by some Coleopterists regarded as! a distinct 
species, iscommon at Yarnton, Wytham Park, &c. 
Philydrus testaceus, F. In standing water; Yarnton, &c., common. 
P. nigricans, Zett. With the preceding, not rare; Yarnton, &c. 
P. coarctatus, Gred. Occurs not rarely with the two preceding species. 
Cymbiodyta ovalis, Th. In standing water; Tubney, Yarnton, &c., 
not rare. 
Anacena globulus, Payk.\ Boththeseare common in ponds, ditches, &c., 
A. limbata, F. and are also found among wet dead leaves. 
Helochares punctatus, Sharp. In ponds; Tubney (W. /#.). 
These three species are pretty generally 
common in standing and running 
water; Cherwell at Summertown, 
| Tubney, &c. 
Berosus luridus, L.) In shallow stagnant ponds at Yarnton; not un- 
B. affinis, Brullé. Jj common. 
Limnebius truncatellus, Thunb. Jn standing water, wet moss, &c. ; 
Yarnton, not rare. 
L. papposus, Muls. With the preceding, but much less common, 
Chetarthria seminulum, Payk. In wet tufts, flood-refuse, &c. ; 
Marston, Tubney, Yarnton, &c., not rare. 
Helophorus rugosus, Ol. In dry places; sometimes by sweeping ; 
Tubney, occasional. 
H. nubilus, F. On walls and by sweeping; Cothill, Tubney, Wytham 
Park, &c. ; not uncommon. 
. aquaticus, L. In standing water, occasionally flying; generally not 
rare. 
. eneipennis, Th. In standing water; not uncommon. 
. affinis, Marsh. In standing water, on wet mud, &c. ; very common. 
ae ok Taken at King’s Weir (W. #7). 
*H.nanus, Sturm. In the Cherwell at Marston ; rare. 
Ochthebius pygmzus, F. In wet moss, standing water, &c.; Tubney, 
not rare. 
O. bicolon, Germ. In shallow ponds in spring ; Yarnton, common. 
Hydrena riparia, Kug. In running water, flood-refuse, &c. ; Marston, 
Yarnton, not common. ‘‘ Taken at Oxford not far from Port Meadow 
in May, 1822” (F. W. 77.). 
Cyclonotum orbiculare, F. In wet places, flood-refuse, &c. ; generally 
Laccobius sinuatus, Mots. 
L. minutus, L. 
L. bipunctatus, F. 
o 
eopengenge 
common. 
Sphzridium scarabeoides, L. Both these species are found very com- 
S. bipustulatum, F. monly in fresh cow-dung, and 
sometimes on the wing. 
Cercyon hemorrhous, Gyll. In dung, &c.; Tubney; King’s Weir 
(W. #2). 
C. hemorrhoidalis, F. In dung, vegetable refuse, &c.; not rare. 
*C. obsoletus, Gyll. Tubney (/. Z.). 
