The New Encyclopaedia Britannica: Macropaedia: knowledge in depth. 19 vEncyclopaedia Britannica, Incorporated, 1981 - Encyclopedias and dictionaries |
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Page 20
... species of Holothyrus is known to secrete an irritant substance that is toxic to fowl and man . The house - mouse mite ( Liponyssoides sanguineus ) , which transmits the disease rickettsialpox to man , probably is the most important species ...
... species of Holothyrus is known to secrete an irritant substance that is toxic to fowl and man . The house - mouse mite ( Liponyssoides sanguineus ) , which transmits the disease rickettsialpox to man , probably is the most important species ...
Page 1073
... species . Family Diguetidae ( diguetids ) . Six eyes ; long carapace covered by scales ; abdomen covered by scales and hairs ; live beneath a vertical silk tube with a horizontal sheet of threads ; known only from the North American ...
... species . Family Diguetidae ( diguetids ) . Six eyes ; long carapace covered by scales ; abdomen covered by scales and hairs ; live beneath a vertical silk tube with a horizontal sheet of threads ; known only from the North American ...
Page 1074
... species ; mostly tropi- cal , but many in northern and Arctic regions . Superfamily Ammoxenoidea . Two tarsal claws ; spinnerets as in Urocteidae , anterior far apart , but no colulus ; chelicerae fused near base and lacking teeth ...
... species ; mostly tropi- cal , but many in northern and Arctic regions . Superfamily Ammoxenoidea . Two tarsal claws ; spinnerets as in Urocteidae , anterior far apart , but no colulus ; chelicerae fused near base and lacking teeth ...
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