294 
weed (Hupatorium purpurcum), boneset (Eupatorium perfoliatum) and a 
bewildering variety of members of the sunflower tribe (Helianthus, Bidens, 
ete.). Where this thicket is sufficiently open there frequently occur patches 
of wild rye (Elymus virginicus, B. canadensis). 
The central portion of these swamps dominated by Homalocenchrus ap- 
peared to be characterized by a rather different assemblage of Orthoptera 
than that typical of the surrounding thickets, though, owing to the usually 
restricted size of the swamps, it was not possible in all instances to clearly 
distinguished the two groups. In general, however, the Homalocenchrus 
areas appeared to be characterized by such Orthoptera as Orchelimuim 
nigripes, Neoconocephalus palustris, Stauroderus curtipennis, Conocephalus 
attenuatus and Paroxrya hoosieri. The surrounding thickets were especially 
characterized by the short-winged Melanopli, such as Melanoplus obovati- 
pennis, M. scudderi, M. gracilis and M. viridipes, together with numerous 
exiumples of Jeclanoplus differentialis, Conocephalus nigropleurum and 
Conocephalus memoralis. Two forms that appeared to occur indifferently 
in both zones were Orchelimum vulgare and Conocephalus brevipennis (inel. 
ensiformis ). 
RELATIVE FREQUENCY OF THE SPECIES. 
As regards numbers the most abundant grasshopper in this region is 
Melanoplus femur-rubrum which appears to swarm everywhere on both 
upland avd lowland, though it appeared to be less frequent in wooded 
areas than in more open situations. Next to it in point of numbers I 
would place JMelanoplus atlanis which is common, but more local than 
femur-rubrim. Other species which appeared to be present in what 
may be regarded as abundance were Hncoptolophus sordidus, Dissosteira 
carolina, Melanoplus differentialis, Orchelimum vulgare, Conocephalus 
strictus and Nemobius fasiatus. Much less frequent, but on the whole 
rather common were such species as Syrbula admirabilis, Arphia ranthop- 
tera, Chortophaya viridifasciata, and Melanoplus Jemoratus. Some species 
appeared to be of frequent or regular occurrence locally wherever the spe- 
cial conditions making up their normal environment prevailed. Thus 
Spharagemon bolli and Melanoplus scudderi and luridus occurred, usually inp 
considerable numbers, wherever there were dry open woodlands, while in 
the swamps, or their borders, three species, J/elanoplus differentialis, Or- 
chelimum nigripes and Conocephalus brevipennis were in all but one or 
two instances abuudant. Associated with the last three were frequently 
