MICHIGAN ACADEMY OF SCIENCE. 
157 
brown, immaculate. Hind femora light brown, with a longitudinal fus- 
cous band; knees black, tibiae brown. While the above markings are 
constant, green may be substituted for brown. 
Measurements: — Length of body, male, 15 mm., female a 20 mm., 
female b, 21 mm. ; tegmina, male, 11.5 nun., female a, 16 mm., female &, 
il mm. ; hind femora, male, 11 nun., females, 13 nun. ; antennae, male, 
9 mm. 
SUB-FAMILY OEDIPODINAE. 
This sub-family is characterized by a rounded vertex, nearly vertical 
face, and the lack of a spine on the prosternum. The hind margin of 
the pronotum is wider than the front. They frequently fly' twenty-five 
feet, or farther, and, since the inner wings are usually brightly colored, 
a careless observer may at first mistake them for butterflies. 
The following table was intended to enable one to distinguish easily 
the Douglas Lake species, not to give true generic characteristics. 
Key to Genera and Species of Oedipodinae. 
I. 
II. 
Inner wings transparent at base; no distinct black border. 
16, Camnula pellucida. 
Inner wings colored at base. 
1. Median carina cut by two sulci. 
17, Gircotettix verruculatus. 
2. Median carina cut by one sulcus. 
a. Base of wings yellow. 
(a) Length of body less than 20 mm.; prozona one- 
lmlf metazona. 
18, Scirtettica rnarmoratus. 
(b) Length of body more than 20 mm.; prozona 
more than one-half metazona. 
19, Spharagemon bollL 
b. Base of wings red. 
20, Arphia pseudonietana. 
c. Base of wings black. 
21, D issosteira Carolina. 
Genus Camnula Stal. 
“Body short, the size below the average for Oedipodinae. the head 
compressed. Vertex with its disk ovate-oblong in male, broader in 
female, its front half sloping downward, the apex rounded, the lateral 
carinae distinct, the median carina very faint in the female, absent in 
the male; foveolae indistinct, narrowly triangular. * * * Antennae 
short, filiform. Pronotum with its disk flat, not rugose, * * * the 
lateral carinae distinct on both prozona and metazona. * * * Teg- 
mina narrow, surpassing the abdomen; the apical third remotely reticu- 
late, the cells quadrate. Inner wings pellucid with dusky venules.” — 
Blatchley. 
16. Camnula pellucida (Scudder). — Vertex tapering, carinate; 
frontal costa, at the top, about the width of the basal joint of the an- 
tennae, wider near the ocellus, shallowly sulcate, deepest at ocellus. 
