. The Cambridge natural history. Zoology. POLYMORPH A DERMESTIDAE 241. the life-history of these small Insects. They are of some interest, as this structure of the foot is not found in any other beetles. Fam. 43. Dermestidae.âT'arsi Jirc-joi iitcd; antinnac usiitdhj short, v:it]h the did) frequently rery large in proportiun, and with the under side of the thorax hearing a hollow for its reeejMon. Front coxae rather long, oblique: hind coxa formed to receive the femur when in repose. A family of 300 or 400 species of small or moderate-sized beetles ; the ^i^- ^'^^â -Adimems setosus XAi- mendae.
. The Cambridge natural history. Zoology. POLYMORPH A DERMESTIDAE 241. the life-history of these small Insects. They are of some interest, as this structure of the foot is not found in any other beetles. Fam. 43. Dermestidae.âT'arsi Jirc-joi iitcd; antinnac usiitdhj short, v:it]h the did) frequently rery large in proportiun, and with the under side of the thorax hearing a hollow for its reeejMon. Front coxae rather long, oblique: hind coxa formed to receive the femur when in repose. A family of 300 or 400 species of small or moderate-sized beetles ; the ^i^- ^'^^â -Adimems setosus XAi- mendae. A, the Insect ; B, one surface, usually covered with fine foot more enlarged. Mexico. From hair, forming \a pattern, or with Biol. CeiUr. Amer. Col.\^.'pt.^. scales. By turns, the position of which has long been disputed, has now been placed in this family; it has a more imperfectly formed prosternum, and the third and fourth joints of the tarsi are prolonged as membranous lobes beneath ; the hind coxae leave the femora quite free. Dermestidae in the larval state nearly all li^'e on dried animal matter, and are sometimes very destructive; some of them totally destroy zoological collections. They are very remarkable on account of the complex clothing of hairs they bear; they have good powers of locomotion, and many of them have a peculiar gait, running for a short distance, then stopping and vibrating some of their hairs w4th extreme rapidity. They exhibit great variety of form. Many of them are capable of supporting life for long periods on little or no food, and in such cases moult an increased number of times : pupation takes place in the larval skin. Anthrenus fasciatus has 1 )een reared in large numbers on a diet of dried horse-hair in furniture. The young larva of tliis species observed by the writer did not possess the remarkable, complex arrangement of hairs that appeared when it was further grown. The most curious of Dermestid larvae is that of Tiresias serra, which
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