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ited by the river during periods of overflow. Owing to its position, the 

 presence of the rank vegetation and of the resulting huinus 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 

 orysoides and Ambrosia trifidd. 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 Elymus, chiefly E. virginicus with some canadensis, occupied 

 the better lighted areas while in the more shaded spots such forms as 

 Homalocenchrus virginicus, Muhlenbergia apparently M. tenuiflora, Kory- 

 rarpus arundinaceus and Hystrix hystrix were common. Adjoining this 

 woodland on tbe 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, 

 in the drier situations the patches of Elymus canadensis yielded such spe- 

 cies as Dichromorpha viridis, Melanoplus viridipes, Melanoplus atlanis — 

 an unusually bumid environment for this form — Melanoplus femur-ru- 

 brum, Melanoplus femoratus, Amblgcorypha rotundifolia and Conocephalus 

 nemoralis. With the exception of Melanoplus femur-rubrum none of these 

 were common or widespread, being in most cases represented only by 

 scattered individuals or an occasional colony. Other grasses besides the 

 Elymus were searched for Orthoptera, but, excepting Tridens, proved to be 

 barren. In the dense thickets of ragweed, Ambrosia trifida, surrounding the 

 more boggy spots Melanoplus femur-rubrum and Melanoplus differential is 

 were abundant, while in the same tracts a few examples of Melanoplus 

 scudderi were also taken. In the swamp tbe Orthoptera were most numer- 

 ous in the Homalocenchrus orysoides 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 Melanoplus 

 femur-rubrum, Conocephalus bevipcmiis, Melanoplus differential's, Or- 

 chelimum nigripes, Orchclimum vulgarc and Conocephalus nigropleurum; 

 in much smaller numbers were found such species as Oceanthus fasciatus, 

 Oecanthus quadripunctatus, Scudderia f areata Xeoconoceplialus palustris, 

 Orchelimum gladiator, Conocephalus fasciatus, Conocephalus nemoralis 



