ee. Clavus noticeably narrowed towards the apex, never extending beyond the scutellum, the two not meeting to form a commissure; head horizontal, much prolonged between the antennæ, on each side with an antennal tubercle, sometimes acute; ocelli absent; meso- and metasternum simple; tarsi each with two segments; body flattened ([fig. 19c]). Aradidæ, including Dysodiidæ.
dd. Pulvilli present (absent in one Australian family Thaumatocoridæ in which case there is a membranous appendage at the tip of the tibia). Capsidæ (= Miridæ),[G] Eotrechus (in family Gerridæ), Næogaidæ, Tingitidæ, Piesmidæ, Myodochidæ, Corizidæ, Coreidæ, Alydidæ, Pentatomidæ, Scutelleridæ, etc.
bb. Apex of head directed ventrally, beak arising from the hinder part of the lower side of the head; sides of face contiguous to the front coxæ; first pair of wings, when present, of uniform thickness. Cicadas, scale insects, plant lice (Aphids), spittle-insects, leaf hoppers, etc. HOMOPTERA
Reduviidæ of the United States
(Adapted from a key given by Fracker).
a. Ocelli none; wings and hemelytra always present in the adults; no discodial areole in the corium near the apex of the clavus. Orthometrops decorata, Oncerotrachelus acuminatus, etc., Pennsylvania and south. Sarcinæ