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Jaguars, black. Janson, E.W., on the proportions of the sexes in Tomicus villosus; on stridulant beetles. Japan, encouragement of licentiousness in. Japanese, general beardlessness of the; aversion of the, to whiskers. Jardine, Sir W., on the Argus pheasant. Jarrold, Dr., on modifications of the skull induced by unnatural position. Jarves, Mr., on infanticide in the Sandwich Islands.

Layard, E.L., on the instance of rationality in a cobra; on the pugnacity of Gallus Stanleyi. Laycock, Dr., on vital periodicity; theroid nature of idiots. Leaves, autumn, tints useless. Lecky, Mr., on the sense of duty; on suicide; on the practice of celibacy; his view of the crimes of savages; on the gradual rise of morality. Leconte, J.L., on the stridulant organ in the Coprini and Dynastini.

Cold, supposed effects of; power of supporting, by man. Coleoptera, stridulation of; stridulant organs of, discussed. Colias edusa and hyale. Collingwood, C., on the pugnacity of the butterflies of Borneo; on butterflies being attracted by a dead specimen of the same species. Colobus, absence of the thumb. Colombia, flattened heads of savages of. Colonists, success of the English as.

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.

Celibacy, unknown among the savages of South Africa and South America. Centipedes. Cephalopoda, absence of secondary sexual characters in. Cephalopterus ornatus. Cephalopterus penduliger. Cerambyx heros, stridulant organ of. Ceratodus, paddle of. Ceratophora aspera, nasal appendages of. Ceratophora Stoddartii, nasal horn of. Cerceris, habits of. Cercocebus aethiops, whiskers, etc., of.

Landois, H., gnats attracted by sound; on the production of sound by the Cicadae; on the stridulating organ of the crickets; on Decticus; on the stridulating organs of the Acridiidae; stridulating apparatus, in Orthoptera; on the stridulation of Necrophorus; on the stridulant organ of Cerambyx heros; on the stridulant organ of Geotrupes; on the stridulating organs in the Cleoptera; on the ticking of Anobium.