500 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
pal sulcus, the mid-carina distinct only on metazone. Prosternal 
spine distinctly conical, rather bluntly pointed, Mesosternum 
strongly protuberant in male, less so but distinctly in female. 
Mesosternal interspace quadrate or longitudinal in female; 
longitudinal and much narrowed in male. Tegmina elongate, 
narrow, usually exceeding hind knees by 2 to 3 . mm. Hind 
femora of graceful outline but strong. Subgenital plate long, 
upturned, emarginate at tip, the sides of the dorsal margin 
widened at base. Cerci short, less than twice the width of the 
base, and subtrapezoidal, the ventral side of apex obliquely 
excised, the dorsal margin a little concave, apex bluntly rounded, 
shallowly sulcate, in same plane as base. Ovipositor with scoop 
of upper valves rather short, angulate at base. Cerci of female 
short, ovate, sides convex. 
Color: dark olivaceous or reddish brown above, greenish yellow 
to yellow beneath. Hind tibiae and often the under side of the 
hind femora red; in other examples the hind tibiae are greenish, 
blue, or either of these colors at base and reddish at tip. Lateral 
fuscous stripe usually noticeable on head and prozone, but often 
much broken up and irregular. Tegmina usually with a very 
distinct median line of dusky spots alternating with pale ones, 
and numerous smaller dusky flecks near the apex. Metepisternal 
pale stripe distinct. Hind femora fasciate with oblique dusky 
bands. Altogether, the dusky markings are decidedly more 
prominent than in M. femur-rubrum. 
The hind tibiae are normally red, but in about ten per cent of 
cases or less they are either reddish at tip and otherwise colored 
at base, or luteous, glaucous, or bluish. In this respect males 
seem more variable than females. 
Measurements. 
Total 
Body Hind femora 
Tegmina 
Antenna 
Male 
. . 20.5-27 
17-21.5 10-13 
15 -21 
7 -8.5 
Female . . . . 
20 -29 
16-27 10-14 
14.5-22 
6.5-8 mm, 
The tegmina pass the hind femora from 1.5 to 6 mm., usually 
about 2 to 3 mm. 
The Lesser Migratory Locust is a near relative of the dreaded 
Rocky Mountain Locust or Grasshopper which devastated the 
western States in 1875-8, and it has many of the characteristics 
of its larger relative, including a capacity for multiplying to 
