SUBFAMILY ACRIDINAE 65 
Face very oblique with fastigium of vertex acute Pseudopomala 
Face vertical or nearly so, the fastigium of vertex never acute 
Mesosternal lobes longer than broad, the inner margin straight; insects of 
large size Schistocerca 
Mesosternal lobes transverse, or length equal to breadth; the inner margin 
rounded 
Melanopli 
Lateral margin of subgenital plate of male, viewed laterally, straight through- 
out or but slightly convex, never ampliate at base; furcula of male com- 
posed of projecting cylindrical fingers Hypochlora 
Lateral margin of subgenital plate of male, viewed laterally, convex or 
sinuate, decidedly ampliate at base 
Subgenital plate of male with a distinct subapical tubercle, but not other- 
wise tumescent ; body relatively slender and compressed Hesperotettix 
Subgenital of male with no distinct subapical tubercle but often apically 
prolonged or tumescent 
Interval between mesosternal lobes of male distinctly transverse; 
metasternal lobes of male generally distant or sometimes almost 
approximate; face slightly oblique Podisma 
Interval between mesosternal lobes of male generally longer or much 
longer than broad; metasternal lobes of male generally attingent or 
subattingent 
Head not enlarged or prominent and but little longer than the prozona, 
save when the latter is transverse; intercalary veins relatively numer- 
ous; cerci of male (in our species) never styliform Melanoplus 
Head large in proportion to pronotum and nearly half as long again 
as the long prozona; intercalary veins few and not well marked; 
cerci of male styliform; subgenital very narrow Phoetaliotes 
PSEUDOPOMALA Morse 
Vertex horizontal, longer than broad, semi-elliptical, convex, and 
with a very distinct median carina, laterally sulcate in female, or ex- 
tended into laminae in the male, with the margins limited by the lat- 
eral carinae. Lateral foveolae are wanting, frontal costa sulcate 
throughout with heavy, slightly divergent, lateral carinae except at 
the apex, where it is much constricted. The face is nearly straight 
and very declivent. The antennae are slightly triquetrous and much 
flattened and expanded basally, where they about equal in breadth the 
short diameter of the eye. In the female they are as long as the head 
and pronotum and in the male considerably longer than this. Pro- 
notum slightly longer than the head; the disk nearly plain though 
slightly elevated toward the median carina which is distinct and cut 
once, far behind the middle, by the principal sulcus, which is visible, 
although faint on the disk. The lateral carinae are distinct, parallel, 
or slightly narrowed posteriorly, and normally cut by the principal 
sulcus only, though sometimes in males the first sulcus, though faint, 
cuts the carinae. The posterior margin of the metazona is straight in 
females and very broadly rounded or nearly straight in males. The 
lateral lobes of the pronotum are vertical, slightly convex above, with 
the anterior and posterior margins strongly oblique, the anterior 
straight and the posterior sinuate just above the lower angle, which 
