. Animal parasites and human disease. Insect Vectors; Parasites; Parasitic Diseases; Medical parasitology; Insects as carriers of disease. CHAPTER XXII BEDBUGS AND THEIR ALLIES The Order Hemiptera. — The order of insects, Hemiptera (or Rhynchota), which includes the true bugs, contains a number of species which habitually or occasionally attack man. The most important of these are the bedbugs, which are found all over the world in temperate and tropical climates. There are few objects which are more disgusting than bedbugs to good housekeepers, yet there are few who, at one time or another, ha
. Animal parasites and human disease. Insect Vectors; Parasites; Parasitic Diseases; Medical parasitology; Insects as carriers of disease. CHAPTER XXII BEDBUGS AND THEIR ALLIES The Order Hemiptera. — The order of insects, Hemiptera (or Rhynchota), which includes the true bugs, contains a number of species which habitually or occasionally attack man. The most important of these are the bedbugs, which are found all over the world in temperate and tropical climates. There are few objects which are more disgusting than bedbugs to good housekeepers, yet there are few who, at one time or another, have not had to contend with them or at least guard against them. Belonging to an allied family are the cone-noses, larger than bedbugs and not devoid of wings, fiercer in disposition and capable of producing much more painful bites. A considerable number of species of these bugs are known and are found in all warm countries. The relation of bugs to disease is still very im- Fig. 162. A hemipteran wing perfectly known, but these para- sites are positively known to least one important disease, and are suspected of transmitting several others. The true bugs, order Hemiptera, are characterized by having piercing and sucking mouthparts contained in a jointed beak and by an incomplete metamorphosis, , not undergoing a complete transformation from a larval to an adult form during a period of rest, as do such insects as butterflies, beetles, etc. The newly hatched young may differ quite considerably from the adult, but the mature characteristics are gradually attained with each successive moult. The order is divided into two suborders, only one of which, the Heteroptera, concerns us here. In the members of this group the first pair of wings, if present, have a thickened, leathery basal portion and a membranous terminal portion (Fig. 162). The second pair of wings are always mem- branous when present. 370. Please note that these images are extracted from scanned page im
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