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Notes on Water Beetles. 
By C. VA ROBERTS. 
The occasional finding of a single specimen of some so-called 
Western species in the East or South has been sometimes noted, and is 
easily accounted for. Like, for instance, the writer’s taking a specimen 
of Chrysobothris exesa near the New York Central R. R. tracks in N. Y. 
City, which was undoubtedly conveyed there in a freight car or in lumber. 
But it is not usual to find such species in numbers nor continuously. 
Bennington County, Vermont, has proved to me unique in this 
respect. ; | 
Three seasons ago I took a single specimen of Cnemidolus callosus 
there, and last season two specimens more were taken. I have also taken 
five specimens of Deronectes stria/ellus. eretofore I have known these 
two only from the West and South-west. 
I have also taken three examples of an undescribed species of Hy- 
droporus, found previously, so far as I can learn, only at or near Wash- 
ington, D. C. 
Last, but not least remarkable, Dr. Horn has just determined for 
me, from the same locality, Manchester, Vt., Lemmnedbius piceus, ‘known 
only from California!” Of this species I have taken twelve or fifteen 
specimens, and it can not therefore be chance, but is certainly remark- 
able distribution. 
This locality has proved an Eldorado, as far as water beetles, in a 
broad sense, are concerned. [ama very busy man, unfortunately for 
my collection, and a short vacation during the Summer is about all the 
time I have to devote to collecting ; yet in three seasons I have turned 
up winety-seven species. Myson, a mere Jad, but an enthusiastic col- 
lector, captured during last season forty odd species, among them up- 
wards of 250 specimens of Cnremuidolus edentulus, so that 1 am rather 
“long” of that stock. Parnide are usually looked for upon sticks, bits 
of wood or bark, and under stones, &c., in szz/t running streams, but 
it has not been my experience to find them there exclusively. There is 
quite a body of water at Manchester, called Dead Pond, which ap- 
parently has neither inlet nor outlet, and is as still and dead as a pond 
can be. Here I find, each season, two or three species of L/mis, cling- 
ing to the stems of moss. 
The moss also vields many of the smaller Dyfscida, &c. I have 
found a net made from common, though stout, cheese cloth best, as it 
drains easily and none of the small things escape. I have taken in a 
single haul, from a ditch not over eight inches deep, and barely wide 
enough to admit a net, literally hundreds of specimens ; and they were 
