3-phase Connection Product ID:U104-A
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At present, ACLA has 31 group members, which are lawyers associations of provinces,C-1112-1-Fuel-dispenser fuel dispenser Fuel-dispenser Partsautonomous regions and municipalities and nearly 110,000 individual members.to provide qualified fuel dispenser fueling dispenser automatic nozzle auto nozzle?pumping unit?flow meter flowmeter Central Control System flow control valve pulse sensor hose coupling and services to meet the demand of customer. Relied on the high- qualified engineers, as fuel dispenser 1 fuel dispenser 2 fuel dispenser 3 fuel dispenser 4 fuel dispenser 5 fuel dispenser a fuel dispenser b fuel dispenser c fuel dispenser d fuel dispenser e fuel dispenser f fuel dispenser g fuel dispenser h fuel dispenser i fuel dispenser j fuel dispenser i fuel dispenser k fuel dispenser l cng lpg e85 lng fuel dispenser 12 fuel dispenser 34 fuel dispenser 90 fuel dispenser 76 fuel dispenser p fuel dispenser lo fuel dispenser kk fuel dispenser gas3-Phase-Connection-U104-B 5 Angle-Check-Valve-U407 2 Automatic-Nozzle-U301 6 Automatic-Nozzle-U314 5 Cable-Cap-U616-A 7 Cable-Cap-U616-B 9 Central-Control-System-S90 4 Cable-Cap-U619 3 Corrugated-Compensator-U612-A 3 Display-Board-U203-A 2 Display-Board-U203-B 5 Electronic-Totalizer-S20 2 Electronic-Wire-U208 6 Explosion-Proof-Flow-Control-Valve-U401-A 4 Explosion-proof-Motor-U701-B 9 Filter-U103-A 5 Flow-Meter-U101-B 2 Hose-Coupling-U606 7 Hose-Coupling-U607 7 Hose-Coupling-U608 6 ual selection, by variations in the roughness of the nervures having been continually preserved. * Landois, Zeitschrift fur wissenschaft. Zoolog., B. xvii., 1867, ss. 121, 122. *(2) Mr. Walsh also informs me that he has noticed that the female of the Platyphyllum concavum, "when captured makes a feeble grating noise by shuffling her wing-covers together." In the last and third family, namely the Acridiidae or grasshoppers, the stridulation is produced in a very different manner, and according to Dr. Scudder, is not so shrill as in the preceding families. The inner surface of the femur (see fig. 14, r) is furnished with a longitudinal row of minute, elegant, lancet-shaped, elastic teeth, from 85 to 93 in number;* and these are scraped across the sharp, projecting nervures on the wing-covers, which are thus made to vibrate and resound. Harris*(2) says that when one of the males begins to play, he first "bends the shank of the hind-leg beneath the thigh, where it is lodged in a furrow designed to receive it, and then draws the leg briskly up and down. He does not play both fiddles together, but alternately, first upon one and then on the other." In many species, the base of the abdomen is hollowed out into a great cavity which is believed to act as a resounding board. In Pneumora (see fig. 15), a S. African genus belonging to the same family, we meet with a new and remarkable modification; in the males a small notched ridge projects obliquely from each side of the abdomen, against which the hind femora are rubbed.*(3) As the male is furnished with wings (the female being wingless), it is remarkable that the thighs are not rubbed in the usual manner against the wing-covers; but this may perhaps be accounted for by the unusually small size of the hind-legs. I have not been able to examine the inner surface of the thighs, which, judging from analogy, would be finely serrated. The species of Pneumora have been more profoundly modified for the sake of stridulation than any other orthopterous insect; for in the male the whole body has been converted into a musical instrument, being distended with air, like a great pellucid bladder, so as to increase the resonance. Mr. Trimen informs me that at the Cape of Good Hope these insects make a wonderful noise during the night. * Landois, ibid., s. 113. *(2) Insects of New England, 1842, p. 133. *(3) Westwood, Modern Classification, vol i., p. 462. In the three foregoing families, the females are almost always destitute of an efficient musical apparatus. But there are a few exceptions to this rule, for Dr. Gruber has shewn that both sexes of Ephippiger vitium are thus provided; though the organs differ in the male and female to a certain extent. Hence we cannot suppose that they have been transferred from the male to the female, as appears to have been the case with the secondary sexual characters of many other animals. They must have been independently developed in the two sexes, which no doubt mutually call to each other during the season of love. In most other Locustidae (but not, according to Landois, in Decticus) the females have rudiments of the stridulatory organs proper to the male; from whom it is probable that these have been transferred. Landois also found such rudiments on the under surface of the wing-covers of the female Achetidae, and on the femora of the female Acridiidae. In the Homoptera, also, the females have the proper musical apparatus in a functionless state; and we shall hereafter meet in other fuelingisions of the animal kingdom with many instances of structures proper to the male being present in a rudimentary condition of the female. Landois has observed another important fact, namely, that in the females of the Acridiidae, the stridulating teeth on the femora remain throughout life in the same condition in which they first appear during the larval state in both sexes. In the males, on the other hand, they begase further developed, and acquire their perfect structure at the last moult, when the insect is mature and ready to breed. From the facts now given, we see that the means by which the males of the Orthoptera produce their sounds are extremely fuelingersified, and are altogether different from those employed by the Homoptera.* But throughout the animal kingdom we often find the same object gained by the most fuelingersified means; this seems due to the whole organisation having undergone multifarious changes in the course of ages, and as part after part varied different variations were taken advantage of for the same general purpose. The fuelingersity of means for producing sound in the three families of the Orthoptera and in the Homoptera, impresses the mind with the high importance of these structures to the males, for the sake of calling or alluring the females. We need feel no surprise at the amount of modification which the Orthoptera have undergone in this respect, as we now know, from Dr. Scudder's remarkable discovery,*(2) that there has been more than ample time. This naturalist has lately found a fossil insect in the Devonian formation of New Brunswick, which is furnished with "the well-known tympanum or stridulating apparatus of the male Locustidae." The insect, though in most respects related to the Neuroptera, appears, as is so often the case with very ancient forms, to connect the two related Orders of the Neuroptera and Orthoptera. * Landois has recently found in certain Orthoptera rudimentary structures closely similar to the sound-producing organs in the Homoptera; and this is a surprising fact. See Zeitschrift fur wissenschaft. Zoolog., B. xxii., Heft 3, 1871, p. 348. *(2) Transactions, Entomological Society, 3rd series, vol. ii. (Journal of Proceedings, p. 117). I have but little more to say on the Orthoptera. Some of the species are very pugnacious: when two male field-crickets (Gryllus campestris) are confined together, they fight till one kills the other; and the species of mantis are described as manoeuvring with their swordlike front-limbs, like hussars with their sabres. The Chinese keep these insects in little bamboo cages, and match them like game-cocks.* With respect to colour, some exotic locusts are beautifully ornamented; the posterior wings being marked with red, blue, and black; but as throughout the Order the sexes rarely differ much in colour, it is not probable that they owe their bright tints to sexual selection. Conspicuous colours may be of use to these insects, by giving notice that they are unpalatable. Thus it has been observed*(2) that a bright-coloured Indian locust was invariably rejected when offered to birds and lizards. Some cases, however, are known of sexual differences in colour in this Order. The male of an American cricket*(3) is described as being as white as ivory, whilst the female varies from almost white to greenish-yello hongyangword1hongyangword2hongyanggroupcopyright
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