60 
LOCAL HABITATS. 
tufts of grass be thrown into the water, the 
insects will be easily discovered on the surface. 
It may be stated, that light and sandy soils 
furnish the most, and clay the fewest insects. 
The best pits in the neighbourhood of London 
are at Charlton, Darenth, Coombe wood, 
Wandsworth common, and Hampstead heath. 
Stagnant Ponds, ditches, running streams, 
and their banks, have each their peculiar in- 
sects. On examining the surface, many insects 
which fall in by accident, will be found. Ma- 
cronychus 4 — tuberculatus is found on the con- 
tinent in running brooks, adhering to the un- 
derside of stones- If assiduously sought for it 
might turn up in this country. Colymbetes 
pauludosus is always found in running water. 
Sandy Shores of the Sea, and Rivers, 
produce peculiar and valuable insects. Search 
should be made under stones, rotten wood, 
dung, dead animals, weeds, and rejectamenta, 
at all seasons, both above and below high 
water mark. The bottoms, sides, and fissures 
of perpendicular rocks should be constantly 
searched, also salt marshes and brackish wa- 
ters ; and trees, slirubs, and plants, near these 
situations should be well beaten and examined. 
Forests and Woods. Uncultivated ground 
is generally the most productive, and in pro- 
