. Tierische Schädlinge und Krankheiten. Medizinische Parasitologie ; Insekten als Überträger von Krankheiten. Struktur der Bettwanzen 371 Wanzen allgemein Konto. - Die bettwanzen gehören zur Familie Cimi-cidffi. Sie haben breite flache Stellen, und sind ohne Flügel, außer für ein paar dornige Pads, die die ersten paar Flügel (Bild dar. 163). Das erste Segment des Thorax hat winglike Erweiterungen an den Seiten, die wachsen und teilweise sur-Runde den kleinen Kopf. In der männlichen der Bauch ist ganz an der Spitze hingewiesen, während in der weiblichen es gleichmäßig gerundet und die Kontur des Abdomen, fast einer pro

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. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. STRUCTURE OF BEDBUGS 371 Bedbugs General Account. — The bedbugs belong to the family Cimi- cidffi. They have broad flat bodies, and are devoid of wings, except for a pair of spiny pads which represent the first pair of wings (Fig. 163). The first segment of the thorax has winglike expansions at the sides which grow forward and partially sur- round the small head. In the male the abdomen is quite pointed at the tip, whereas in the female it is evenly rounded, the contour of the abdomen being almost a perfect circle in unfed bugs. The eyes project prominently at the sides of the head, the flexible four-jointed antennae are constantly moved about in front of the head, and the jointed beak is folded under the head so that it is entirely invisible from above. The legs have the usual seg- ments, the tarsi being three- jointed. The greater part of the body is covered with bristles set in little cup-shaped depres- sions. These depressions are perforated at the bottom to allow for the passage of muscles which move the bristles. Murray describes having seen bugs raise the bristles upon meeting each other as cats raise their hairs or birds their feathers. The bristles are of two kinds, one a simple slender spine, the other with a stouter flattened end, with sawlike teeth along the thinner edge. In addition to both kinds of bristles, the legs also have a dense brush of hairs at the end of each tibia. When a bug is distended with blood a smooth shining band can be seen at the base of each abdominal segment where no bristles occur (Fig. 163). These bands are the portions of the segments which are not ordinarily exposed, being overlapped by the preceding segment. One of the most striking characteristics of bedbugs is the peculiar pungent odor so well known to all who have had to con-. FiG. 163. Bedbug, Cimex lectuLarius^ female. X 10.. Please note that these images are extracted from scan

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• bookcentury1900
• bookdecade1910
• bookpublishernewyorkjwiley