Reduviidce of the United States 
281 
pair of wings, when present, of uniform thickness. Cicadas, scale 
insects, plant lice (Aphids), spittle-insects, leaf hoppers, etc . 
HOMOPTERA 
ReduvtidjE 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 decor ata, 
Oncerotrachelus acuminatus, etc., Pennsylvania and south. Sarcince 
aa. Ocelli present in the winged individuals; anterior coxae 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 coxae ex¬ 
ternally flat or concave . PIRATING 
e. Middle tibiae without spongy fossa, head long, no lateral tubercle 
on neck. S. stria, Carolina, Ill., Cal . Sirthenia Spinola 
ee. Middle tibiae with spongy fossa; fore tibiae convex above; neck 
with a small tubercle on each side, 
f. Apical portion of anterior tibiae angularly dilated beneath, the 
spongy fossa being preceded by a small prominence. 
. Melanolestes Stal 
g. Black, with piceous legs and antennae. 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. Tibiae not dilated as in “f”; spongy fossa elongate; metapleural 
sulci close to the margin. R. biguttatus (fig. 22). South 
. Rasahus A. and S. 
dd. Thorax constricted in the middle or cephalad of the middle; anterior 
tarsi each three-segmented. 
e. Apex of the scutellum narrow, without spines or with a single spine 
. REDUVIINjE 
f. Antennae inserted in the lateral or dorso-lateral margins of the head; 
antenniferous tubercles slightly projecting from the sides of the 
head; head produced strongly cephalad; ocelli at least as far 
apart as the eyes. 
g. Antennae inserted very near the apex of the head; segments 
one and three of the beak short, segment two nearly four 
times as long as segment one. R. prolixus. W. I . 
. Rhodnius Stal 
gg. Antennae inserted remote from the vertex of the head. 
h. Body slightly hairy; pronotum distinctly constricted; angles 
distinct; anterior lobe four-tuberculate, with the middle 
tubercles large and conical. M. phyllosoma, large species 
the southwest. Meccus Stal 
