REPORT OF THE STATE ENTOMOLOGIST I907 161 



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 Avherever 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 Erioptera 

 chlorophylla. 



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 

 not appear commonly in the building as at Saranac Inn. Only 

 Ephemerella, Hydropyschidae and midges emerged in considerable 

 numbers from the hatchery troughs. Other ]\Iay flies (Siphlurus 

 c.nd 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 

 common holarctic, S i d a c r y s t a 1 1 i n a , 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 

 g i b b e r u m , 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 wath long proboscis that I took to 

 belong to the genus Stylaria. 



