42 THE ACRIDIIDAE OF MINNESOTA 
vated fields, in spots where the growth is sparse. The male usually 
stridulates rather loudly during flight, which while swift is not pro- 
longed. On two occasions we have noted the female of this species 
ovipositing in the somewhat compact earth at the mouth of a gopher 
hole. We have taken this insect at Pipestone, Worthington, Redwood 
Falls, Granite Falls, New Ulm, Mankato, Fergus Falls, and Mahto- 
medi, and it doubtless occurs throughout the southern and western 
part of the State. 
CAMNULA Stal. 
Size rather small for an Oedipodid, somewhat stouter than the 
preceding, the head more distinctly compressed; vertex with the disk 
subtriangular, with rounded angles in the male and almost ovate in 
the female; median carina visible posteriorly from the disk in both 
sexes. Blatchley (The Orthoptera of Indiana, p. 261) says the median 
carina of the vertex is absent in the male, but in a series of 80 before 
us, we find the median carina distinct in 66, weak in 6, and absent in 
but. 8 males. Lateral carinae of vertex strong and more or less in- 
curved posteriorly. Antennae short, not exceeding the head and pro- 
notum, filiform. Pronotum with disk narrowed anteriorly and grad- 
ually widened to the posterior margin, which is bluntly angulate; sur- 
face of the disk flat, more or less rugulose or tuberculate on the meta- 
zona, but never strongly so as in Hippiscus; median carina distinctly 
elevated throughout, distinctly though faintly notched before the 
middle; lateral carinae distinct on both prozona and metazona, in the 
female broken or obsolescent at the principal sulcus; lateral lobes of 
pronotum vertical, deeper than long, both margins nearly straight and 
lower angles not much rounded. Tegmina rather narrow, surpassing 
the abdomen, the apical third somewhat reticulate. Hind femora equal- 
ing or surpassing the abdomen, not stout. A single species occurs 
throughout Canada and the northern part of the United States, from 
the Atlantic to the Pacific. 
Camnula pellucida Scudd. 
The color of Camnula pellucida is somewhat variable (Plate I, 
5) but in general is a light brown, sometimes ferruginous; an- 
tennae yellow at base and darker apically. A pallid area is usually 
visible below the eyes; postocular band narrow at the eye, widened 
behind on the lateral lobe of the prozona, extending downward over 
much of the surface and usually more or less indistinctly connected 
with the area on the opposite lobe of the prozona by a brownish bar 
