MORSE: ORTHOPTERA OF NEW ENGLAND. 449 
The Oedipodinae are notable not only for their gaudily colored 
wings, but quite as much for the rattling noise which the males of 
many species produce in flight. The female also, in some cases, 
makes it in less degree. Sounds are produced not only while 
flying, but also when at rest, as in the Acridinae, by rubbing the 
hind thighs against the wing-covers, the intercalary vein of which 
is in most cases toothed or roughened. 
Key to the Species of New England Oedipodinae. 
(See Plate 21.) 
A. Wings black with a pale border 
Carolina Locust, Dissosteira Carolina, p. 465. 
AA. Wings not black. 
B. Disk of wings nearly or quite transparent, not bounded by a distinct 
blackish band. 
C. Prozone roof-shaped, the lateral carinae absent, the front margin 
angulate. Hind femora without dusky bands on outer face. 
Intercalary vein of tegmina sinuous, approximated distally to 
radial vein. Discoidal area of tegmina much narrower than distal 
end of ulnar area. Wings usually faintly clouded with dusky in 
front of middle of hind margin. 
Green-striped Locust, Chortophaga viridifasciata, p. 455, 
CC. Prozone with disk relatively flat, the lateral carinae conspicuous. 
Discoidal area of tegmina as wide as widest part of ulnar area. 
D. Median carina of pronotum high; disk of prozone nearly as wide 
and long as metazone. Intercalary vein of tegmina straight, 
nearer ulnar than radial vein for its entire length. Wings faintly 
clouded with dusky at tip, the disk faintly yellowish. 
Dusky Locust, Encoptolophiis sordidus, p. 458. 
DD. Median carina of pronotum low; disk of metazone much wider 
and longer than prozone. Intercalary vein of tegmina sin- 
uous, approximated to radial vein distally. Wings with dusky 
venules but transparent except for very faint tinge of dusky 
at tip Clear-winged Locust, Camnula pellucida, p. 460. 
BB. Disk of wings opaque, colored (white, yellow, orange, red), plainly 
bounded by a black band. 
E. Median carina of pronotum entire, not incised. ' Scutellum of vertex 
with a distinct, usually deep, transverse curved impression. Dark 
brown species with very slender antennae, densely reticulate teg- 
mina, and deep-yellow wings. 
1 The great majority of specimens fall readily into one or the other of these 
series. Rarely examples of the Sand Locust and the Marbled Locust present 
a profile which will leave the novice in doubt. 
