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Updated: May 23, 2025
The whirring of cicadas; the shrill stridulation of a vast number and variety of field crickets and grasshoppers, each species sounding its peculiar note; the plaintive hooting of tree frogs all blended together in one continuous ringing sound the audible expression of the teeming profusion of Nature.
Geographical distribution, as evidence of specific distinctions in man. Geometrae, brightly coloured beneath. Geophagus, frontal protuberance of, male; eggs hatched by the male, in the mouth or branchial cavity. Georgia, change of colour in Germans settled in. Geotrupes, stridulation of. Gerbe, M., on the nest-building of Crenilabus massa and C. Melops.
Stretch, Mr., on the numerical proportion in the sexes of chickens. Stridulation, by males of Theridion; of Hemiptera; of the Orthoptera and Homoptera discussed; of beetles. Stripes, retained throughout groups of birds; disappearance of, in adult mammals. Strix flammea. Structure, existence of unserviceable modifications of. Struggle for existence, in man.
Orsodacna ruficollis. Orthoptera, metamorphosis of; stridulating apparatus of; colours of; rudimentary stridulating organs in female; stridulation of the, and Homoptera, discussed. Ortygornis gularis, pugnacity of the male. Oryctes, stridulation of; sexual differences in the stridulant organs of. Oryx leucoryx, use of the horns of. Osphranter rufus, sexual difference in the colour of.
From the Western Union desks the clicking of the throng of instruments rose into the air in an incessant staccato stridulation. The messenger boys ran back and forth at top speed, dodging in and out among the knots of clerks and traders, colliding with one another, and without interruption intoning the names of those for whom they had despatches.
Dutch, retention of their colour by the, in South Africa. Duty, sense of. Duvaucel, female Hylobates washing her young. Dyaks, pride of, in mere homicide. Dynastes, large size of males of. Dynastini, stridulation of. Dytiscus, dimorphism of females of; grooved elytra of the female. Eagle, young Cercopithecus rescued from, by the troop. Eagle, white-headed, breeding in immature plumage.
Abductor of the fifth metatarsal, presence of, in man. Abercrombie, Dr., on disease of the brain affecting speech. Abipones, marriage customs of the. Abortion, prevalence of the practice of. Abou-Simbel, caves of. Abramis brama. Abstraction, power of, in animals. Acalles, stridulation of. Acanthodactylus capensis, sexual differences of colour in. Accentor Modularis.
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.
Hedge-warbler, young of the. Heel, small projection of, in the Aymara Indians. Hegt, M., on the development of the spurs in peacocks. Heliconidae, mimicry of, by other butterflies. Heliopathes, stridulation peculiar to the male. Heliothrix auriculata, young of. Helix pomatia, example of individual attachment in. Hellins, J., proportions of sexes of Lepidoptera reared by.
Conscious action, I presume, comes into play when two males fight for a female; but I do not know whether you admit that, for instance, the spur of the cock is due to sexual selection. No account that I have seen of the stridulation of male insects shows that it is a challenge. All those who have attended to birds consider their song as a charm to the females and not as a challenge.
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