British Social Wasps: An Introduction to Their Anatomy and Physiology, Architecture, and General Natural History ; with Illustrations of the Different Species and Their NestsLongmans, Green, Reader, and Dyer, 1868 - Всего страниц: 270 |
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Стр. vii
... flight .. .. Requisites of a flying - machine .. Elements of the problem of flight Passive : Ratio of area of wings to weight Influence of form and position Active : General principles of aërial propulsion Upward pressure in horizontal ...
... flight .. .. Requisites of a flying - machine .. Elements of the problem of flight Passive : Ratio of area of wings to weight Influence of form and position Active : General principles of aërial propulsion Upward pressure in horizontal ...
Стр. 16
... flight , and the wings thus fastened will look much better and retain their position more securely than when they are adjusted by pins . They are to be held in this position by another long lighter pin lying over the stronger one and ...
... flight , and the wings thus fastened will look much better and retain their position more securely than when they are adjusted by pins . They are to be held in this position by another long lighter pin lying over the stronger one and ...
Стр. 53
... flight of locusts , or a pesti- lential vapour might have been chosen as instru- ments to drive out the Amorites . But , as it was , the indigenous hornets were selected to expel them gradually and quietly , and then , in their turn ...
... flight of locusts , or a pesti- lential vapour might have been chosen as instru- ments to drive out the Amorites . But , as it was , the indigenous hornets were selected to expel them gradually and quietly , and then , in their turn ...
Стр. 70
... flight , needs a range of vision as long and as wide as that of many birds . Again , its habits of working alternately in bright sunshine and in almost absolute darkness would seem to require as perfect an adaptation of its eyes to ...
... flight , needs a range of vision as long and as wide as that of many birds . Again , its habits of working alternately in bright sunshine and in almost absolute darkness would seem to require as perfect an adaptation of its eyes to ...
Стр. 88
... FLIGHT . THE thorax of insects presents to the entomo- logist a problem very like that which comparative anatomists have found in the vertebrate skull . Both these parts are composed of elements which appear in a simpler form in other ...
... FLIGHT . THE thorax of insects presents to the entomo- logist a problem very like that which comparative anatomists have found in the vertebrate skull . Both these parts are composed of elements which appear in a simpler form in other ...
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abdomen abdominal ring antennæ appear arrangement attached bees black band body britannica British build cells central clypeus cocoon colour comb compound eyes connected Crown 8vo cusp Cyclopædia dark displayed distinct dorsal dorsal scale edge eggs Entomology examination female fibres fore-wings germanica glands ground-wasps higher animals honey-bee hooks hornet horny Hymenoptera Illustrations integument joints labium labour larger larva larvæ layer legs less limbs male mandibles markings materials maxillæ membrane meta-thorax metathorax microscope mouth muscles of flight Natural History nest notch observation oesophagus organs outer ovaries pair paper perfect insect Plate portion prothorax pupa queen round rufa salivary glands scale scarcely scutellum seen segments side skin smaller Solitary group species specimen spiracles spots sting structure surface swarm sylvestris thorax tion trace trachea tree-wasps tubes ventral scales Vespa Vespidæ vulgaris wasp's wasps wings workers yellow
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