Handbook of Medical Entomology Part 36

l. Antennae filiform or sometimes more slender apically, geniculate; wing membrane with two or three large basal cells; scutellum small or moderate REDUVIIDae

For a key to the genera and species see next page.

ll. Last antennal segment clavate or fusiform; win membrane with the veins often forked and anastomosing; scutellum large; tarsi each with two segments; fore legs strong. (= PHYMATIDae) MACROCEPHALIDae

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 antennae, on each side with an antennal tubercle, sometimes acute; ocelli absent; meso- and metasternum simple; tarsi each with two segments; body flattened (fig. 19c). ARADIDae, including DYSODIIDae.

dd. Pulvilli present (absent in one Australian family THAUMATOCORIDae in which case there is a membranous appendage at the tip of the tibia). CAPSIDae (= MIRIDae),[G] _Eotrechus_ (in family GERRIDae), NaeOGAIDae, TINGITIDae, PIESMIDae, MYODOCHIDae, CORIZIDae, COREIDae, ALYDIDae, PENTATOMIDae, SCUTELLERIDae, 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 c.o.xae; first pair of wings, when present, of uniform thickness. Cicadas, scale insects, plant lice (Aphids), spittle-insects, leaf hoppers, etc. h.o.m.oPTERA

REDUVIIDae OF THE UNITED STATES

(Adapted from a key given by Fracker).

a. Ocelli none; wings and hemelytra always present in the adults; no discoidal areole in the corium near the apex of the clavus.

_Orthometrops decorata_, _Oncerotrachelus ac.u.minatus_, etc., Pennsylvania and south. _Sarcinae_

aa. Ocelli present in the winged individuals; anterior c.o.xae 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 c.o.xae externally flat or concave. PIRATINae

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 REDUVIINae

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; p.r.o.notum distinctly constricted; angles distinct; anterior lobe four-tuberculate, with the middle tubercles large and conical. _M.

phyllosoma_, large species from the southwest.

_Meccus_ Stal

hh. Body smooth, margin of the p.r.o.notum sinuous, scarcely constricted; anterior lobe lined with little tubercles. CONORHINUS Lap.

i. Surface of the p.r.o.notum and prosternum more or less granular.

j. Eyes small, head black; body very narrow, a fifth as wide as long; beak reaches the middle of the prosternum. California. C. PROTRACTUS

jj. Eyes large, head fuscous; body at least a fourth as wide as long. Southern species. _C.

rubrofasciatus_

ii. p.r.o.notum and prosternum dest.i.tute of granules.

j. Border of abdomen entirely black except for a narrow yellowish spot at the apex of one segment.

Texas. _C. gerstaeckeri_

jj. Border of abdomen otherwise marked.

k. Beak slender, joints one and two slightly pilose, two more than twice as long as one; tubercles at the apical angles of the p.r.o.notum slightly acute, conical. Md. to Ill. and south. The masked bed bug hunter (fig. 71). C. SANGUISUGUS

kk. Beak entirely pilose, joint two a third longer than joint one; joint one much longer than three; tubercles at the apical angles of p.r.o.notum slightly elevated, obtuse. Ga., Ill., Tex., Cal. _C. variegatus_

ff. Antenna inserted on top of the head between margins, close to the eyes; antenniferous tubercles not projecting from the side of the head.

g. Anterior lobe of the p.r.o.notum with a bispinous or bituberculate disc; femora unarmed. _S. arizonica_, _S.

bicolor_. Southwestern species. _Spiniger_ Burm.

gg. Disc of p.r.o.notum unarmed; apex of scutellum produced into a spine; ocelli close to the eyes; eyes large and close together. REDUVIUS Lamarck

h. Color piceous. Widely distributed in the United States.

(Fig. 20). R. PERSONATUS

hh. More or less testaceous in color. Southwestern states.

R. SENILIS

ee. Apex of scutellum broad, with two or three spines.

ECTRICHODIINae

f. First segment of the antenna about as long as the head. _E.

cruciata_ Pa. and south; _E. cinctiventris_, Tex. and Mex.

_Ectrichodia_ L. et S.