. Entomology for medical officers. Insect pests; Insects as carriers of disease. ORDBR RHYNCHOTA (HEMIPTERA): BUGS 203 (e\vTpov = a. sheath), and the distal half as the membrane. The elytrum (Fig. 86) is composed either of two lateral pieces—a smaller inner plate, or clavus, and a larger outer plate, or corium ; or the tip of the corium may be separated as a third distinct plate, or cuneus; or the outer (costal) edge of the corium may form a fourth distinct plate, or embolium. The Heteroptera consist of two groups, namely, the Gymnocerata {yvfivos = naked ; Kepai; = horn), in which the. Fig. 8
. Entomology for medical officers. Insect pests; Insects as carriers of disease. ORDBR RHYNCHOTA (HEMIPTERA): BUGS 203 (e\vTpov = a. sheath), and the distal half as the membrane. The elytrum (Fig. 86) is composed either of two lateral pieces—a smaller inner plate, or clavus, and a larger outer plate, or corium ; or the tip of the corium may be separated as a third distinct plate, or cuneus; or the outer (costal) edge of the corium may form a fourth distinct plate, or embolium. The Heteroptera consist of two groups, namely, the Gymnocerata {yvfivos = naked ; Kepai; = horn), in which the. Fig. 86.—Elytrum of Bug. antennae are conspicuous; and the Cryptocerata (jcpvirro^ = hidden), in which the antennae are' hidden beneath the head or in pits. Except for certain forms that skate about on the surface of water, or that have semi-aquatic habits (and these forms are distinguished by having the under-surface of the abdomen covered with a dense pubescence), the Gymno- cerata are land-bugs. The Cryptocerata are almost all truly aquatic. {a) Heteroptera Gymnocerata. Of the many families of GYMNOCERATA we need mention only the Cimicidcs, the Polyctenidce, the ReduviidcB, the Aradidce, and the HydrometridcB. I. Family CiMiclD^. This small family includes the bed-bugs. The CimicidE have a broad and rather short head, a flat oval body, and short elytra that leave the abdomen uncovered : the antenna is composed of 4 segments, and the beak, which in repose lies in a groove, of 3: hind wings are absent, and the tarsi consist of 3 segments. The two notorious species are Cimex lectularius, the common bed-bug of northern latitudes, and Cimex rotundatus the bed-bug of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Alcock, A. (Alfred), 1859-1933. London, Gurney & Jackson
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Keywords: ., bookcentury1900, bookdecade1910, bookpubl, booksubjectinsectpests
