The Insects - Outline of Entomology 3th Edition - Chapter 5 pot

... 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, ... 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 ... 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...

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

... defensive and other com-pounds are products of the epidermis, which is a near-continuous, single-celled layer beneath the cuticle.Many of these compounds are secreted to the outside of the insect ... a poison-injecting sting (Fig. 14.11) and the eggs areejected at the base of the sting. In all other cases, the eggs pass down a canal in the shaft of the ovipositor(section 5. 8). The shaft ... pair of gonostyles (the third valves) derived from the distal part of the appendages of segment 9 (and homo-logous with the styles of the apterygotes mentionedabove). In each half of the ovipositor,...

The Insects - Outline of Entomology 3th Edition - Chapter 3 potx

... including: the meta-bolism of carbohydrates, lipids, and nitrogenous com-pounds; the storage of glycogen, fat, and protein; the synthesis and regulation of blood sugar; and the syn-thesis of major ... 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 ... mixture of hormones, including JH-I, JH-II, JH-III, and JH-0. The occurrence of mixed-JH-producing insects (such as the tobacco hornworm, Manduca sexta)Box 3.1 Molecular genetic techniques and their...

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...

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 ... 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 ... The dynamics (the time-varying pattern) of air movementgives information on the nature of the stimulus (andthus on what type of animal is approaching) and is indic-ated by the properties of...

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The Insects - Outline of Entomology 3th Edition - Chapter 6 pptx

... 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 ... case when the photoperiodic response of the maternal generation of silkworms affects the eggs of the next generation. The ability of insects to recognize seasonal photo-period and other environmental ... 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...

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, ... 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 ... 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...

The Insects - Outline of Entomology 3th Edition - Chapter 9 ppt

... nature.9 .5. 2 Fungus farming by leaf-cutter ants The subterranean ant nests of the genus Atta ( 15 spe-cies) and the rather smaller colonies of Acromyrmex(24 species) are amongst the major earthen ... 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 ... systems.Annual Review of Entomology 35, 249–69.TIC09 5/ 20/04 4:44 PM Page 237232 Ground-dwelling insects The Archaeognatha and Zygentoma represent the sur-viving remnants of a wider radiation of primitively...

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The Insects - Outline of Entomology 3th Edition - Chapter 10 pdf

... 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 ... into prox-imity by the stream flow.Many lotic insects are smaller than their counter-parts in standing waters. Their size, together with flex-ible body design, allows them to live amongst the cracksand...

The Insects - Outline of Entomology 3th Edition - Chapter 11 ppsx

... 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 ... sensory receptors of the wasp respond onlyto the volatile chemicals of its host fig, and the size andmorphology of the guarding scales of the fig ostioleallow entry only to a fig wasp of the “correct”...

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