452 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY 
brown, darkened toward the end, which is very shghtly enlarged. 
Scutellum of the vertex blunt anteriorly, nearly as broad as long, 
the lateral carinae often continued backward and more convergent 
on the occiput than in A. sulphurea. Facial costa broad through- 
out, scarcely narrowed at union with vertex. Pronotum with the 
carina high, arched, equalling one-third to one-half the depth of 
the lateral lobes, the disk somewhat tectiform; front and hind 
margins strongly produced, with sides excavate and the liind 
margin acute-angled. 
General color blackish brown ( cT ) or tawny brown ( 9 ) above, 
sometimes much paler or yellowish brown on the cheeks and outer 
face of hind femora; beneath black. Tegmina often mottled with 
black or dusky. Wings with the basal half or more bright j^ellow, 
bounded distally by a broad black band about as wide as the 
wing-cover, which sends off a broad shoot near the front margin 
one-fifth to one-half the distance to the base of the wing; apex 
transparent, clouded with fuscous. Hind femora annulate with 
pale near the knees, which are black, and spotted or banded with 
pale on the inner side of base at the half. Hind tibiae dusky, 
paler beneath on the distal half, and annulate with pale at the 
basal fifth. 
In the central States a variable proportion of the specimens 
captured have the disk of the wings a deep orange, but this 
coloration apparently does not occur in New England. 
Measurements. 
Total Body Tegmina 
Male 30-34 21-25 22.5-27 
Female 34.5-40 28-32 26.5-30 
In sunny September days, when the tufted bunch-grass (An- 
dropogon) unsheathes its feathery plumes and its stems begin to 
take on the deep Indian-red hue of maturity, when amethyst 
patches of the "fly-away" or purple wood-grass {Eragrostis 
pectinacea) enrich the fading fields, the Autumn Yellow-winged 
Locust adds its quota of color and sound to the pageant of autumn. 
With large and brightly colored wings and rattling flight it seldom 
fails to attract the attention and interest of the September stroller 
in sandy fields, where it enlivens the landscape even in this golden 
time of the year. On warm days, where it is numerous and active. 
Hind femora 
Antenna 
14.6-17.3 
10-11 
17 -18.5 
9-11.5 mm 
