38 THE ACRIDIIDAE OF MINNESOTA 
a loop at the extremity ; lateral foveolae strongly and deeply impressed, 
narrowing anteriorly. Pronotum grayish brown, the upper surface 
unusually flat for an Arphia, rugulose, the median but little elevated, 
not laterally pinched at middle, regularly but slightly diminishing in 
height posteriorly. Tegmina profusely sprinkled with small grayish- 
fuscous spots, less abundant apically where the area is pellucid. Wings 
yellowish at base, pellucid to an unusual extent at tip (nearly one third 
of the ante-anal field is included in the pellucid area) making the 
transverse dusky bar narrower than in any species of Arphia known 
to me; the radial shoot toward the base, however, is unusually broad 
Fig. 4. Normal Habitat of Arphia sulphurea 
and long, equaling at its origin the entire breadth of that part of the 
wing and scarcely stopping short of the base. Hind femora brownish- 
yellow, externally with two broad, a little oblique, dusky transverse 
bands; hind tibiae pale yellow, with a broad fuscous cloud at tip and 
just before the middle. Length: male 21 mm., tegmina 22.5 mm., 
antennae 8.5 mm., hind femur 11.5 mm.” The species was described 
from one male taken at Denver. 
Arphia sulphurea Fabr. 
Arphia sulphurea is one of our earliest forms and may often be 
taken in early spring in company with Chortophaga viridifasciata. It 
