54 THE ACRIDIIDAE OF MINNESOTA 
triangular, though more or less rounded behind by the incurving of the 
lateral carinae, in some forms suggesting that of Dissosteira. The 
lateral carinae are weak and the median, although very faint, is indi- 
cated especially in the male; foveolae rather large, shallow, triangular ; 
the frontal costa sulcate, at least below the ocellus; antennae rather 
long, usually attaining the tip of the hind femora, the basal joints 
somewhat flattened. Pronotum tectate on the prozona and flattened 
on the metazona, the median carina strong and high, cut before the 
middle by a deep, sometimes oblique, notch; lateral canthi, in males, 
distinct on the metazona, cut by the sulcus and less distinct on the 
prozona; in the female they are rounded upon the metazona. The 
tegmina are always well developed but shorter and relatively somewhat 
narrower than in Dissosteira, exceeding the tip of hind femora in both 
sexes ; wings with colored basal area yellow, with a dark arcuate band 
near the middle. Hind femora stout, more or less depressed, exceed- 
ing the tip of the abdomen; hind tibiae variable in color, in ours with 
at least the apical portion red. The species belonging to this genus are 
extremely alike and difficult to separate. Although certain of the 
species found within our State have been reduced to subspecies or 
varieties by recent authors, we prefer, for the purposes of this paper, 
to consider all of equal rank. The following key will aid in separating 
our species: 
Posterior tibiae tricolored, basally whitish, a broad median black or fuscous 
annulation, and the apical half red; size rather large; tegmina with two more 
or less distinct transverse fuscous bars bollt 
Posterior tibiae normally red, sometimes paler at the base but never with a median 
fuscous annulation 
Median carina of pronotum high and not sinuate on the prozona 
Large species; head rather narrawed above ; _ _ collare 
Small species; head quadrate above; tegmina widest at costal dilation and 
arcuate toward apex wyomimgianum 
Median carina of pronotum lower and usually sinuate on prozona; width of 
vertex between the eyes distinctly more than width of one eye aequale 
Spharagemon bolli Scudd. 
Spharagemon bolli is preéminently a lover of dry soil and wooded 
places and has been noted through a large portion of the State, espe- 
cially in the eastern half. It is a large and well-marked species, the 
somewhat conspicuous tricolored hind tibiae readily serving to identify 
it in the field. The body colors are quite variable but normally a dark 
or grayish brown, the tegmina marked with minute blackish spots, 
which, especially in the male, are aggregated into more or less distinct’ 
transverse bars. In males the median carina of the pronotum is more 
elevated than in the female. Both sexes have a strong, swift flight 
with a distinct rustling of the wings, which, however, is under control 
of the insect. The same dry, somewhat open woods that abounds in 
