60 THE ACRIDIIDAE OF MINNESOTA 
is sharp and subrectangular. The inferior margin is straight and 
nearly horizontal. The mesosternal lobes are separated by a space 
somewhat longer than broad in the female and about as long as broad 
in the male. Wings are abortive in both sexes and the tegmina may 
be short or well developed. The posterior femora are slender and 
not distinctly banded; posterior tibiae have the inner apical spurs not 
very unequal. The last ventral segment of the male is horizontal, 
elongate, conical, and about four times as long as the penultimate. 
The ovipositor is moderately to strongly exserted. We have but one 
species in this genus, which from its peculiar structure has been va- 
riously placed in the Tryxalinae and the Acridinae. 
Pseudopomala brachyptera Scudd. 
Pseudopomala brachyptera is an odd-looking insect. As stated 
previously it presents characters of both the Tryxalinae and the Acri- 
dinae. ‘The prosternal spine is distinctly and sharply conical, although 
small, but the general aspect is that of a Tryxalid. In color the species 
is brown, minutely dotted with black and obscurely striped with some- 
what lighter shades. The female is more uniformly brown than the 
male. In general aspect this insect has much the appearance of a small 
brachypterous form of Mermeria. In lowa adults have been taken 
from June 6 to late September, while immature forms (pupa or nymph) 
have been taken as late as July 10, thus suggesting a somewhat ir- 
regular breeding period. So far as our field experience goes, this 
species appears to be associated with certain tall grasses, notably An- 
dropogon scoparius Michx. In Minnesota it has been taken at Pipe- 
stone, Brown Valley, and Gray Cloud Island, and careful collecting 
will doubtless discover it at other points in the southern part of the 
State. 
SCHISTOCERCA: Stal: 
Size relatively large. Vertex with the front deflexed; fastigium 
not prolonged and apically obtuse; lateral foveolae minute or wanting; 
lateral carinae low and faint; median carina absent; face nearly ver- 
tical. Pronotum with the disk convex on the prozona and flattened on 
the metazona; the lateral carinae absent, the median low but distinct; 
posterior margin of the metazona rounded or subangulate. Lobes of 
the mesosternum longer than broad, with the inner margin straight, 
and strongly angulate at tip. Tegmina always well developed and 
longer than the abdomen in both sexes; wings vitreous. Hind tibiae 
having smooth margins with numerous spines regularly disposed on 
both sides but with no apical spine on the outer margin. Second joint 
