The Insects - Outline of Entomology 3th Edition - Chapter 2 pot

... 2. 22a) and the triangle in Odonata (Fig. 2. 22b). The pterostigma is an opaque or pigmented spot anter- iorly near the apex of the wing (Figs. 2. 20 & 2. 22b). Wing venation patterns are consistent ... wings, Fig. 2. 22 The left wings of a range of insects showing some of the major wing modifications: (a) fore wing of a butterfly of Danaus (Lepidoptera: Nymp...

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... by the plant. By comparison, a macerate-and-flush strategy is typical of Heteroptera, such as mirids and coreids. These insects disrupt the tis- sues of plants or other insects by thrusting of the ... to be the primary mechanism for the movement of gases in the tracheae and is always the sole mode of gas exchange at the tissues. The efficiency of diffusion is...

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... transfer of sperm via the insertion of part of the male’s aedeagus (edeagus), the penis, into the repro- ductive tract of the female. In males of many species the extrusion of the aedeagus during ... oviposition in insects. 5.1 BRINGING THE SEXES TOGETHER Insects often are at their most conspicuous when syn- chronizing the time and place for mating. The flas...

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... numbers of insects is the role of sexual selection in the diversifica- tion of many insects. The propensity of insects to become isolated in small populations (because of the fine scale of their ... classification and their roles in our economic and wider lives. First, we outline the field of entomology and the role of ento- mologists, and then introduce the...

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... that of its neigh- bors and together the array of all ommatidia provides the insect with a panoramic image of the world. Thus, the actual image formed by the compound eye is of a series of apposed ... to locate the source of infrared perhaps as far distant as 12 km – a feat of some interest to the US military. 4 .2. 2 Thermoregulation Insects are poikilothermic,...

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... above, the value of K can be calculated for each of the experimental tem- peratures from 14 to 36°C: Temperature (°C) 14 16 20 24 28 30 32 34 36 K 1008 22 11 28 34 29 21 28 66 27 55 28 61 3415 38 82 Thus, ... renders the tissues sensitive to EH and permits the release of EH into the hemolymph (see section 6 .2. 4 for further discus- sion of the actions of eclo...

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... as wings held roof-like over the abdomen, fore wings either membranous or in the form of tegmina of uni- form texture, and with the rostrum arising ventrally close to the anterior of the thorax, ... view on many of the internal relationships of Insecta and their wider grouping, the Hexapoda. These are discussed below. 7 .2 THE EXTANT HEXAPODA The Hexapoda (usually...

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... wood 22 1 TIC09 5 /20 /04 4:44 PM Page 22 1 22 2 Ground-dwelling insects Box 9.1 Ground pearls In parts of Africa, the encysted nymphs (“ground pearls”) of certain subterranean scale insects are some- times ... systems. Annual Review of Entomology 35, 24 9–69. TIC09 5 /20 /04 4:44 PM Page 23 7 23 2 Ground-dwelling insects The Archaeognatha and Zygentoma represent the...

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... 3.11). Aquatic insects and their oxygen supplies 24 1 TIC10 5 /20 /04 4:43 PM Page 24 1 25 8 Aquatic insects Box 10.6 Other aquatic orders TIC10 5 /20 /04 4:43 PM Page 25 8 24 0 Aquatic insects Every inland ... proponents of the pre- ferred exite–endite theory speculate that the progenitor of the pterygotes had aquatic immature stages. Support for the latter hypothesis...

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... rat-tailed maggot. Text continues on p. 29 4. TIC11 5 /20 /04 4: 42 PM Page 28 8 27 6 Insects and plants Box 11 .2 The grape phylloxera An example of the complexity of a galling life cycle, host-plant ... native range. The host-specificity of potential control agents must be tested, either inside or outside the country of introduction and, in the former case, always in...

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