152 
THIRTEENTH REPORT. 
Color : — Fuscous, excepting for a tawny streak on dorsal surface of 
pronotum on each side of the median carina; legs with brown rings. 
Measurements : — Length of body, 10 mm. ; pronotum. 8.75 nnn. ; hind 
femora, 4 mm. 
Tettigidea parvipennis is a species similar to this, but with wings and 
pronotum shorter than the hind femora. 
SUB-FAMILY ACRIDIINAE. 
This sub-family called Acridiinae by Blatchley, 1902. corresponds to 
Seudder’s Melanopli, 1898. I prefer Blatchley’s name, not only because 
it is later, but also because there is a large genus Melanoplus in this 
sub-family. It seems confusing to have two applications of the same 
term. 
As the key indicates, the easiest way to distinguish the Acridinae is 
*.'7 u O 
by the presence of a bluntly conical spine on the prosternum. The pro- 
notum is nearly smooth, the median carina low, not deeply cut by the 
transverse sulci, lateral earinae rounded or wanting, and the head is 
not so large that the pronotum needs to flare to receive it. The wings 
are never brightly colored or marked. 
Professor Scudder describes 30 genera, one of which contains 136 
species. Blatchley reported six genera and 2G species from Indiana. 
The two genera and six species found at Douglas Lake may be distin- 
guished by the following: 
Key to Genera and Species of Acridiinae. 
I. 
II. 
Tegmina and wings wanting. 
9,. Podisma variegatus. 
Tegmina and wings present. 
Genus Melanoplus. 
1. Cerci of male no wider beyond the middle than at the middle. 
a. Apex of sub-genital plate of male with median notch. 
Hind femora with dark cross-bars on outer surface. 
10, atlanis . 
1). No apical notch on subgenital plate of male. Hind 
femora without dark crossbars on outer surface. 
11 femur-rub rum. 
2. Cerci of male broader at some point beyond middle than at 
middle. 
a. Male less than 20 mm. in length. Cerci with forks 
of equal size. 
b. Male more than 20 mm. in length, 
not forked. 
12, hiridus. 
Cerci spatnlate, 
(a) Pronotum with dark stripes. Hind tibiae 
yellow 7 . 
13, different ialis. 
(b) Pronotum with light lateral stripes. Hind 
tibiae red or purple. 
14, bimtattus. 
