i 
i 
j 
i 
} 
REPORT OF THE STATE ENTOMOLOGIST 1907 101 
everywhere on the larger branches by one looking down into the 
| 
water from a boat. This cove also had the usual fringe of fallen 
tree trunks lying half submerged, decked out to the water line with 
sundew. In the little side pools were beds of native callas. Still 
further back was an almost impenetrable tangle of fallen moss- 
grown boughs intermingled with ferns, and wherever dry enough 
the ground was overspread with broad shining green mats of bunch- 
berry. In these thickets mosquitos and caddis flies swarmed. 
Spongilla flies, so abundant in the hatchery at Saranac Inn, were 
rarely seen in the Old Forge hatchery, but their larvae were found 
in abundance in the osteoles of these living sponge masses, and their 
cocoons were spun thickly about the timbers of the controlling works 
at the dam. A trap lantern was maintained all summer at the 
hatchery pier and captured swarms of little May flies of the genus 
Caenis, swarms of midges, swarms of caddis flies and occasionally 
a large number of the pale green crane fly Hrioptera 
Silorophylia: 
Since the hatchery received its water supply directly through a 
short water pipe from the dam, it is rather surprising that so many 
of the May flies, and the spongilla flies common in the pond did 
hot appear commonly in the building as at Saranac Inn. Only 
Ephemerella, Hydropyschidae and midges emerged in considerable 
numbers from the hatchery troughs. Other May flies (Siphlurus 
and Heptagenia) settled often in large numbers upon the outside 
of the building. 
Two Entomostraca occurred in such numbers within the hatch- 
ery that they could not escape observation. One of these was the 
c-mmon holarctic, Sida crystallina, which settled upon the 
smooth surface of our white earthenware bowls, when these were 
left standing in the troughs. They adhered to them so securely 
by a gelatinous secretion as not to be removed by a gentle washing. 
The other was the remarkable humpbacked Holopedium 
¢ibberum, which for a month following the middle of June 
accumulated in such masses upon the brass screens at the foot of 
the fish troughs that it could be scraped up from them in handfuls. 
The hatchery workmen first called my attention to these. Misled 
by their copious gelatinous envelops and their spherical form, the 
workmen not unnaturally thought them to be some kind of eggs. 
On the bowls with Sida there occurred in small numbers curious 
little Oligochaete worms with long proboscis that I took to 
belong to the genus Stylaria. | 
