REPORT OF THE-STATE ENTOMOLOGIST 1907 189 
was one (Hphemerella dorothea) that was only to be 
obtained by rearing it from the nymph, it being very secretive as to 
its adult habits. I collected chiefly by hand from the hatchery walls, 
by trap lanterns at Old Forge pond and on Moose river, and by 
sweeping nets along the banks of Beaver Meadow brook, and along 
the Adirondack League Club road to Little Moose lake. In a breed- 
ing cage maintained in a hatchery trough by my window, I reared a 
considerable number of May fly nymphs, verifying the breedings of 
former years, and adding a few new life histcries, that will be given 
in the following pages: 
Siphlurus alternatus. This species was common in trashy 
places in the borders of the ponds. I found the nymphs abundant 
in Bald Mountain pond. Adults were taken hovering at First lake 
on June 24th in mid afternoon. They settled in hundreds on the 
outside of the hatchery and could be taken constantly through June 
and July. 
Blasturus cupidus. But few specimens of this elsewhere 
common species were seen. One was taken on the hatchery the 
first of July and several on piers about Old Forge pond in the 
latter pant, Of) une: 
Leptophlebia mollis.- This was another very common species. 
The nymph lived in slow-flowing clear streams, perhaps in other 
places as well, for 1 found the adults everywhere. A few at the 
hatchery ; swarms of them on the Mountain Lodge “ carry” opposite 
Dog Island in First lake, where they were flying underneath a high 
canopy of birch boughs, rising and falling in rapid succession 
through a distance of 25 feet, scarcely descending within 50 feet 
of the ground. I found them in Beaver Meadow brook, both in the 
meadow itself, and in the rocky part of the stream, at the fish ponds 
where four of them emerged within my tent trap. Nymphs taken 
from the stream at this place were reared in the hatchery on the 
sixth of August. 
Callibaetis hageni. This species was common at the hatchery 
inside as well as outside, and during the latter part of July and the 
whole of August, subimagos could be collected in the hatchery win- 
dows. Adults could be picked up from the piers about the border 
of Old Forge pond. These specimens apneared to differ in no 
respect whatever from others obtained from the type locality in 
California. 
Baetis posticatus. This delicate little May fly was to be 
found in the same situations with Leptophlebia. It was abundant 
