58 THE ACRIDIIDAE OF MINNESOTA 
eyes forward into the facial costa; median carina wanting or some- 
times indicated by very faint tubercles in the disk; the lateral foveolae 
rather strongly marked, in our species triangular, the ocellus at the 
lower outer angle. Antennae about the length of the hind femora, 
flattened more strongly on one side than on the other so as to form 
one sharp edge. Pronotum moderately constricted before the middle, 
the front margin truncate, the hind margin rectangulate. Tegmina 
surpassing the hind femora, narrow, the tip broadly rounded, the 
apical half membranaceous. Posterior femora rather slender, reaching 
the tip of the abdomen in the females and considerably surpassing it in 
the males. But one species has been taken in Minnesota. 
Fig. 9. Normal Habitat of Mestobregma cinctum and Arphia pseudonietana 
C. W. Howard 
Mestobregma cinctum Thom. 
Mestobregma cinctum is a very alert and active little insect, found 
in various parts of the State and apparently rather generally distrib- 
uted within our area. In size, general coloration, and flight it strongly 
resembles Psinidia fenestralis, although much more common, but may 
readily be distinguished from that species by the shorter antennae, 
which, while basally somewhat flattened, are not so strongly depressed 
as in Psinidia. The posterior tibiae also differ in the two; in Mesto- 
bregma the tibiae are pale blue with a whitish ring usually present 
