301 
ited by the river during periods of overflow. Owing to its position, the 
presence of the rank vegetation and of the resulting humus the soil was in 
most places moderately damp. but not actually wet. This, however, was 
not the case in one spot where the ground was perpetually moist on 
account of the constant seepage from the bluff. The substratum at this 
spot was a black or dark grey muck with much gravel in its deeper levels. 
Trees were absent from these wetter areas and they were accordingly 
occupied by a rank growth of the usual herbaceous swamp plants the more 
conspicuous of which in this swamp were Typha latifolia, Homalocenchrus 
oryeotides and Ambrosia trifida. South of the swamp was a small bit of 
open woodland in which there was a rich undergrowth of grasses. Of these 
the species of Hlymus, chiefly LE. virginicus with some canadensis, occupied 
the better lighted areas while in the more shaded spots such forms as 
Homalocenchrus virginicus, Muhlenbergia apparently M. tenuiflora, Nory- 
carpus arundinaceus and Hystrix hystrix were common. Adjoining this 
woodland on the south was an open pasture in which there was a good 
stand of Tridens flava. 
Quite a number of interesting Orthoptera were taken in this locality. 
{n the drier situations the patches of Hlymus canadensis yielded such spe- 
cies as Dichromorpha viridis, Melanoplus viridipes, Melanoplus atlanis— 
an unusually humid environment for this form—ZJ/clanoplus femur-ru- 
brum, Melanoplus femoratus, Amblycorypha rotundifolia and Conocephalus 
nemordalis. With the exception of MWelanoplus femur-rubrwm none of these 
were common or widespread, being in most cases represented only by 
scattered individuals or an occasional colony. Other grasses besides the 
Hlymus were searched for Orthoptera, but, excepting 7'ridens, proved to be 
barren. In the dense thickets of ragweed, Ambrosia trifida, surrounding the 
more boggy spots Melénoplus femur-rubrum and Melanoplus differentialis 
were abundant, while in the same tracts a few examples of Melanoplus 
scuddcri were also taken. In the swamp the Orthoptera were most numer- 
ous in the Homalocenchrus oryzoides and the immediately adjoining thick- 
ets; they were apparently quite infrequent in the cat-tails. The most 
abundant swamp species were in order of relative numbers J/elanoplus 
femur-rubrum, Conocephalus bevipennis, Melanoplus differentialis, Or- 
cheliimum nigripes, Orchelimum vulgare anid Conocephalus nigropleurum; 
in much smaller numbers were found such species as Oceanthus fasciatus, 
Occanthus quadripunctatus, Scudderia furcata Neoconocephalus palustris, 
Orchelimum gladiator, Conocephalus fasciatus, Conocephalus nemoralis 
