488 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
uu. Tegmina usually reaching but half or two-thirds the length 
of the hind thighs (rarely five-sixths). Interspace rather 
strongly transverse. 
w. Hind thighs with conspicuous dusky bands, at least above. 
Hind tibiae red. Tegmina usually dark brown, flecked 
with dusky and pale spots. A robust species with strongly 
transverse interspace. Prosternal spine variable, rather 
short. Ovipositor similar to that of M. bqrealis or a little 
stouter. (Very rarely examples are found with tegmina and 
■v^-ings considerably exceeding end of hind thighs.) 
Huckleberry Locust, M. fasciatus, p. 501. 
WW. Hind thighs not obliquely banded, rarely with traces of 
dusky on dorsal part of inner face. Hind tibiae vari- 
able. Tegmina brownish olive, immaculate or very 
nearly so. General color varying from greenish to 
brownish olive above with black markings; luteous 
below, sometimes cherry red on underside of hind thighs 
and tibiae. Interspace varying from subquadrate to 
rather strongly transverse. Tegmina very variable in 
length, sometimes passing hind femora. Prosternal spine 
variable, most resembling that of M. femur-rubrum. Scoop 
of ovipositor in side view without angulation at junction 
with stem Northern Locust, M. borealis, p. 506. 
American Locust. 
Schistocerca serialis (Thimberg). 
Fig. 85; Plate 22, figs. 1, 2. 
Gryllus serialis Thunberg, Mem. Acad. Imp. Sci. St. Petersbourg, vol. 5, 
p. 241 (1815). 
Libellula americana Drury, IUus. Nat. Hist., vol. 1, p. 128, pi. 49, fig. 2 
(1770). 
Schistocerca americana Morse, Psyche, vol. 8, p. 271 (1898). — Waldex, 
Bull. Geol. Nat. Hist. Surv. Ct., no. 16, p. 108 (1911). 
Very large, but of graceful form. Face slightly retreating. 
Antennae about equal to head and pronotum. Prosternal spine 
long, cylindrical, tapering a httle to a dull point, slightly curved 
backward. Mid-carina indicated on metazone. Tegmina very 
long, narrow. Wings ample. Last abdominal segment (cf ) not 
enlarged; subgenital plate elongate, tapering, deeply and acutely 
V-notched at tip. Supra-anal plate elongate, narrow,- somewhat 
trisulcate, the sides sinuate, strongly narrowed before the almost 
cuspidate tip. Furcula not developed. Cerci of male one and 
