aa. Ocelli present in the winged individuals; anterior coxæ not as long as the femora.
b. Hemelytra without a quadrangular or discoidal areole in the corium near the apex of the clavus.
c. Ocelli not farther cephalad than the caudal margins of the eyes; segment two of the antenna single.
d. Thorax usually constricted caudad of the middle; anterior coxæ externally flat or concave. Piratinæ
e. Middle tibiæ without spongy fossa, head long, no lateral tubercle on neck. S. stria, Carolina, Ill., Cal. Sirthenia Spinola
ee. Middle tibiæ with spongy fossa; fore tibiæ convex above; neck with a small tubercle on each side.
f. Apical portion of anterior tibiæ angularly dilated beneath, the spongy fossa being preceded by a small prominence. Melanolestes Stäl
g. Black, with piceous legs and antennæ. N. E. States ([fig. 19a]) M. picipes
gg. Sides, and sometimes the whole dorsal surface of the abdomen red. Ill., and southward. M. abdominalis
ff. Tibiæ not dilated as in "f"; spongy fossa elongate; metapleural sulci close to the margin. R. biguttatus ([fig. 22]). South. Rasahus A. and S.