MICHIGAN ACADEMY OF SCIENCE. 
155 
mina, male, 1G mm., female, 19 mm.; hind femora, male, 11 mm., female, 
14 mm. 
12. Melanoplus luridus (Dodge) .—Occiput, especially of male, 
swollen, so as to project above pronotum; space between eyes little if 
any wider than basal joint of antenna; vertex broadly s and shallowly 
suicate; frontal costa shallowly silicate in male, plane in female; foveo- 
lae small, triangular. Pronotum anteriorly truncate, posteriorly obtuse- 
angulate; median and lateral carinae more distinct on metazona than 
on prozona; the prozona longer than metazona; surface pilose. Teg- 
mina narrow, tapering, just short of tip of abdomen in female, reaching 
just beyond in male. In both sexes, the hind femora reach to the tip of 
the tegmina. Male furcula abbreviate, mere notches. Male cerci taper 
to the middle, then broaden ; distinctly forked at tip, the lower prong 
being more slender than the upper one. 
Color: — General color, wood brown; face bluish brown; occiput 
bluish black, bordered on each side by a yellowish line; disk of prono- 
tum light brown on the sides, dark in the center; lateral lobes of pro- 
notum with a black band across the top, light yellowish brown below. 
Tegmina dark brown, with or without small fuscous dots. Hind femora 
red-brown ; three faint fuscous bars on upper surface ; under surface 
yellow ; knees black ; tibiae bright red with black spines. 
Measurements : — Length of body, male, 19 mm., female, 21 mm. ; teg- 
mina, male, 13.5 mm., female, 14.5 mm. ; hind femora, male, 10.3 mm., 
female, 13 mm. 
13. Melanoplus differential is (IThler).— No adults of this species 
were found. The larvae were found throughout the season ; those caught 
on August 20, apparently in their last moult, were kindly identified for 
me by Professor Osborn. These are described instead of the adults. 
Occiput somewhat swollen ; vertex broad, slightly suicate, continuous 
with the long and shallowly suicate frontal costa; foveolae small, flat, 
equilateral triangles; antennae flattened in basal third. Pronotum 
truncate anteriorly, broadly obtuse posteriorly; disk somewhat sloping, 
lateral carinae not present; posterior border of lateral lobes oblique. 
Abdomen strongly compressed. Hind femora stout. 
Color: — General color, bright green. Face green, dotted with brown, 
especially along the sides of the frontal costa; antennae green at base, 
becoming fuscous at tip. Pronotum with a brown stripe in the position 
for the lateral carinae. Abdomen with a red or brown band on the 
mid-dorsal surface. Hind femora green, with a longitudinal brown 
stripe on the outer surface; knees dusky; tibiae green with black spines. 
14. Melanoplus bivitattus (Say). — There are great differences in 
every respect but color, between the male and female of this species. 
The width of the vertex and frontal costa of the female is more, of the 
male, less than twice the width of the basal joint of the antenna ; 
vertex carinate in the male; frontal costa not distinctly suicate. Foveo- 
lae indistinct, triangular. Pironotum truncate anteriorly, rounded 
posteriorly; median and lateral carinae distinct. Prozona longer than 
the punctate metazona. Tegmina of the female do not reach the tip of 
the abdomen, in the male they project one-fourth their length. Hind 
femora of the female reach the tip of the tegmina, in the male, they are 
shorter; stout in both sexes. Male furcula wanting; cerci narrow 
