The Insects - Outline of Entomology 3th Edition - Chapter 2 pot
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: Nymphalidae); (b) fore wing of a dragonfly of Urothemis ... and the relationship of parts of the appendages to the body, shown for a sepsid fly. (After McAlpine 1987.)TIC 02 5 /20 /04 4:49 PM Page 29 26 External anatomyTIC 02 5 /20 /04 4:49 PM Page 26 The...
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The Insects - Outline of Entomology 3th Edition - Chapter 3 potx
... 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 primarymechanism for the movement of gases in the tracheaeand is always the sole mode of gas exchange at the tissues. The efficiency of diffusion is related to the dis-tance of diffusion ... a vacuum cleaner). The cuticular linings of the tracheae are shed with the rest of the exoskeleton when the insect molts. Usually even the linings of the finestbranches of the tracheal system...
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The Insects - Outline of Entomology 3th Edition - Chapter 5 pot
... 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 flashinglights of fireflies, the singing of crickets, ... allow the valvesto slide back and forth on one another. Such move-ment, and sometimes also the presence of serrations on the tip of the ovipositor, is responsible for the pier-cing action of the...
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The Insects - Outline of Entomology 3th Edition - Chapter 1 ppt
... numbers of insects is the role of sexual selection in the diversifica-tion of many insects. The propensity of insects tobecome isolated in small populations (because of the fine scale of their ... classificationand 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 ecological functions of insects. Next, ... between the distribution of entomologists interested in biodiversityissues (the temperate northern hemisphere) and the centers of richness of the insects themselves (the tropicsand southern hemisphere).Studies...
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The Insects - Outline of Entomology 3th Edition - Chapter 4 ppsx
... 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 aseries 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, that is they lack the meansto ... insensitive to the wing tone of males of their species. Neither can the male detect the wing tone of immature females – the Johnson’s organin his antenna responds only to the wing tone of physio-logically...
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The Insects - Outline of Entomology 3th Edition - Chapter 6 pptx
... 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 36K 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 eclosion hormone). Apolysis at the end of the fifth ... include evacuation of the digestive system to remove the promoters of ice nucle-ation, plus pre-winter synthesis of polyols and anti-freeze agents. In these insects cold hardiness (potentialto survive...
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The Insects - Outline of Entomology 3th Edition - Chapter 7 pdf
... aswings held roof-like over the abdomen, fore wingseither membranous or in the form of tegmina of uni-form texture, and with the rostrum arising ventrallyclose to the anterior of the thorax, ... view on many of the internal relationships of Insecta and their wider grouping, the Hexapoda. Theseare discussed below.7 .2 THE EXTANT HEXAPODA The Hexapoda (usually given the rank of superclass)contains ... ormistaken. The fore-wing-derived halteres of strep-sipterans are gyroscopic organs of equilibrium with the same functional role as the halteres of Diptera (although the latter are derived from the...
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The Insects - Outline of Entomology 3th Edition - Chapter 9 ppt
... wood 22 1TIC09 5 /20 /04 4:44 PM Page 22 1 22 2 Ground-dwelling insects Box 9.1 Ground pearlsIn parts of Africa, the encysted nymphs (“groundpearls”) 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 sur-viving remnants of a wider radiation of primitively ... complex circulation of air through the passageways of the nest, as illustrated for the above-ground nest of the African Macrotermes natalen-sis in Fig. 12. 10. The origin of the mutualistic relationship...
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The Insects - Outline of Entomology 3th Edition - Chapter 10 pdf
... 3.11).Aquatic insects and their oxygen supplies 24 1TIC10 5 /20 /04 4:43 PM Page 24 1 25 8 Aquatic insects Box 10.6 Other aquatic ordersTIC10 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. Supportfor the latter hypothesis appears to come from the factthat the ... hundreds of kilometers from shore in the Pacific Ocean. The dis-tribution of these insects coincides with mid-oceanicaccumulations of flotsam, where food of terrestrial origin supplements a diet of...
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The Insects - Outline of Entomology 3th Edition - Chapter 11 ppsx
... rat-tailed maggot.Text continues on p. 29 4.TIC11 5 /20 /04 4: 42 PM Page 28 8 27 6 Insects and plantsBox 11 .2 The grape phylloxeraAn example of the complexity of a galling life cycle,host-plant ... nativerange. The host-specificity of potential control agentsmust be tested, either inside or outside the country of introduction and, in the former case, always in quaran-tine. The results of these ... Interpreting the early evolution of the angiosperms is contentious, partly because of the paucity of fossilized flowers prior to the period of radiation, and also because of the apparent rapidity of the...
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