496 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Fig. 87. — Purple-striped Locust, Hesperotettix 
hrevipennis pratensis. Female. (After Lugger.) 
The New England form has shorter tegmina and 
wings. 
Face decidedly retreating, the vertex prominent, and the eyes 
closely approaching each other on the top of the head. Prono- 
turn with distinct, percurrent median carina, lateral carinae 
wanting. Prosternal spine conical in female, slender and taper- 
ing in male, sharply pointed. Tegmina narrow and short, 
extending about one-half the length of the hind femora, leaving 
end of abdomen uncovered. Hind femora of medium size. 
Subgenital plate ending in 
a submarginal tubercle; the 
base of the dorsal margin 
much ampliate. Supra- 
anal plate triangular, 
pointed, the sides straight. 
Cerci symmetrical, trian- 
gular, twice as long as 
width of base, tapering 
evenly to a conical point. 
Furcula reduced to a pair of small flattened tubercles. 
Color: bluish grass-green, darker above, yellowish beneath, 
striped with purplish red on dorsal mid-line of pronotum and 
abdomen, dorsal field of tegmina, and femora. Antennae red- 
dish. Eyes brown. Vertex of head with dusky spot, sometimes 
continued backward over occiput. Dusky lateral stripe of 
pronotum restricted to prozone, narrow, irregular. Hind tibiae 
green or blue; spines pale at base, black-tipped. External and 
internal genicular spots of hind femora black. Whitish lines, 
often bordered with dusky purple, run downward from the eyes, 
below lateral stripe on prozone, and obliquely on sides of meso- 
and metathorax. 
Measurements. 
Male . . 
Female 
Body 
Tegmina 
Hind femora 
Antenna 
15-17 
7.6-10 
9.5-10.5 
7.25-8.5 
20-24 
9.7-11.7 
11.8-12.7 
6.3 -7.2 mm, 
This daintily colored Locust was described by Thomas from 
specimens from Georgia. Later it was found in New Jersey by 
Uhler. In 1903 and 1905, I captured it in northwestern Georgia 
and eastern Alabama. In New England, I found a single male 
at Wellesley, Mass., in 1891, and have taken it there in small 
numbers at intervals since. Mr. F. H. Sprague found it at Wal- 
