SUBFAMILY ACRIDINAE 9] 
ance this insect somewhat resembles M. angustipennis and related 
forms and is often found associated with those species. Blatchley 
speaks of the close resemblance of Indiana specimens to M. atlanis and 
M. femur-rubrum, doubtless referring to the red-legged form, but in 
any case it should be readily distinguished from these by the slender 
spinelike fingers of the furcula and the angulate cerci. In this 
State we have found it under varying conditions of habitat but always 
on dry soils; in Iowa, where it occurs throughout the state, its habits 
appear to vary locally. In eastern and southeastern Iowa it is found 
in sandy areas with such associates as M. angustipennis and Arphia 
carinata, while in western Iowa, at Onawa, Denison, and Council 
Bluffs, it was taken only in meadows and grassy areas, while one wa’ 
taken at Cherokee, on the swampy margin of a small stream, asso- 
ciated with small Locustids. In Minnesota we have taken it through- 
out the valley of the Red River and at Pipestone, Redwood Falls, 
and Mahtomedi. 
Melanoplus luridus Dodge 
Rather small, brownish fuscous, often more or less ferruginous ; 
postocular band rather narrow and usually brownish, darker on the 
prozona and not extended on the metazona. The cerci of the male 
are distinctly forked apically, the upper fork larger than the lower. 
This species is well shown on Plate III, 8, and as will be noted, is very 
similar in appearance to M. femur-rubrum, though averaging smaller. 
It occurs commonly in dry upland fields, frequently in high, open woods. 
It matures late in summer and we have taken it im coitu September 9. 
It appears to be rather local in occurrence and frequently, while in 
favored spots many could be taken, it was apparently absent from other 
similar spots in the neighborhood. We have taken this insect at Albert 
Lea, Pipestone, Redwood Falls, Fergus Falls, Detroit, St. Cloud, Mah- 
tomedi, St. Anthony Park, and Red Wing. 
While the species here mentioned is classed as M. luridus, we 
have intermingled with it specimens which should apparently come 
instead under M. collinus Scudd. The two species were separated by 
Scudder upon difference in the development of the furcula and a 
slight difference in the form of the forks of the cerci. We have before 
us specimens showing both of these forms, taken on the same date 
from high, sparsely wooded hills along Ottertail River at Fergus 
Falls. Details of both are shown in the plate above referred to and 
we can but consider both as forms of one species. 
Melanoplus differentialis Uhl. 
Melanoplus differentialis is the largest of our Melanopli, a heavy- 
