MORSE: ORTHOPTERA OF NEW ENGLAND. 481 
and roughnesses of the Acridine and Oedipodine series, caused 
largely by the prominent median and lateral carinae. The 
tarsal pulvilli are exceptionally large, a feature correlated with 
the characteristically plant-loving habits, these insects custom- 
arily perching on vegetation, in sharp contrast to the soil-fre- 
quenting habits of the Oedipodine or Band-winged Locusts. 
The Locusts of this group are much less attractively colored 
than the Oedipodinae and Acridinae, though in the living state 
several of the species are decidedly handsome. The coloration 
is in general protective in character, but in some cases seems 
quite otherwise until the habits are known. It is mainly a com- 
bination of olivaceous, yellow, and rufous brown of varying 
shades, enlivened by ornamental touches of bright red or dull 
blue or greenish which are exposed on occasion. It is so varia- 
ble individually, as well as in relation to environment and tem- 
perature, that it often has but little value for purposes of identi- 
fication and reliance can be placed only on structural characters. 
While the prevailing color of most of the species of Melanoplus 
(the dominant genus) is dull olivaceous, a striking variation oc- 
curs in M. femur-rubrum, M. m. atlanis, and M. confusus, in which 
individuals of both sexes and at least several stages are occasion- 
ally found which have the face and top of head and pronotum 
bright rose-red. They also vary much in color locally, accord- 
ing to the character of the station where found; and seasonally, 
whether collected early or late in the autumn. As a rule, speci- 
mens taken after a number of hard frosts are duller, darker, and 
more suffused than summer examples, the coloration of the indi- 
vidual being apparently considerably modified by such exposure. 
Whether any of our species of this subfamily produce sound 
(other than a rustling of the wings in flight) has yet to be deter- 
mined. Miss Fogg feels certain that she has both seen and 
heard the Rusty Locust (Schistocerca alutacea ruhiginosa) 
stridulate. Scudder reports seeing the Red-legged Locust 
(Melanoplus femur-rubrum) make apparently stridulatory move- 
ments. I have seen, during the past summep (1919), the 
Two-striped Locust {Melanoplus hivittatus) make pronounced 
and oft-repeated motions of the hind legs similar to those 
made by Slant-faced and Band-winged Locusts when stridulat- 
ing, with this difference: the hind femora were not applied or 
