450 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
F. Median carina of pronotum high, arched, compressed, crest-like. 
Hind margin of pronotum acute-angled. Facial costa with 
sides parallel. Dusky band of wing widened near front margin, 
extending one-fourth to one-third the distance to the base of 
wing. . .Autumn Yellow-winged Locust, Arphia xanthoptera, p. 451. 
FF. Median carina of pronotum relatively low, not cristate. Hind 
margin of pronotum right-angled in male, a little obtuse in 
female. Facial costa with sides converging at meeting with 
vertex. Dusky wing-band near front margin extending two- 
thirds the distance to base. 
Spring Yellow-winged Locust, Arphia sulphurea, p. 453. 
EE. Carina of pronotum cut once, by principal sulcus. See also EEE.i 
G. Robust species with antennae not or but little exceeding head and 
pronotum. Dusky wing-band anteriorly extending nearly to 
base of wing. Hind tibiae dull yellow. 
H. Prozone distinctly shorter than metazone. Wings usually red. 
Vertex prominent in side view. Hind process of pronotum 
acute or right-angled. Antennae short, only about equal to 
head and pronotum. 
Coral-winged Locust, Pardalophora apiculata, p. 462. 
HH. Prozone and metazone of equal length ; the lateral carinae not 
cut by principal sulcus. Vertex smoothly convex in side 
view. Hind margin of pronotum obtuse-angled. Wings 
usually yellow, sometimes orange or red. Antennae longer. 
Wrinkled Locust, Hippiscus rugosus, p. 464. 
GG. Slenderer species, the body more or less compressed. Antennae 
much longer than head and pronotum (usually two or three 
times). Dusky wing-band anteriorly but little prolonged 
toward base of wing. Hind tibiae red, or annulate with fus- 
cous, red, and pale. 
I. Hind tibiae ringed with fuscous and red, with pale band near base. 
J. Larger, the 9 over 30 mm., c? over 26 mm. Median carina 
of pronotum equally developed throughout, rather high, 
reaching level of top of head. Vertex projecting the width 
of an eye. Front margin of pronotum distinctly angulate 
and body compressed. 
BoU's Waste-land Locust, Spharagemon bolli, p. 469. 
JJ. Smaller, the 9 less than 30 mm., the c? less than 25 mm. 
Carina of pronotum low, depressed below level of top of 
head. Eyes prominent. Vertex short, less projecting. 
Marbled Locust, Scirtetica marmorata, p. 472. 
II. Hind tibiae without dusky annulations. Median carina of 
prozone unequally developed, the hind part of disk of prozone 
elevated, rising broadly on the carina. 
K. Carina high, arched on both prozone and metazone; the cleft 
> See footnote on previous page. 
