. British insects : a familiar description of the form, structure, habits, and transformations of insects. the Wood-borers it is a sort of auger. They are also to be easilyFig. 48. distinguished by the form of the lip (labium), which is trifid inthe Sawflies, simple in theWood-borers, The tibia of thefore-leg in the Sawflies has twospurs, in the Wood-borers insects vary also in the form and proportion of theLabium of Sawfly—Trichiosoma. ,, thorax. Division I.—The Sawflies.—The Sawfly, or Ten-thredo* (, fig. 1) is amongst the most easily recog-nised of insects, its form and gene
. British insects : a familiar description of the form, structure, habits, and transformations of insects. the Wood-borers it is a sort of auger. They are also to be easilyFig. 48. distinguished by the form of the lip (labium), which is trifid inthe Sawflies, simple in theWood-borers, The tibia of thefore-leg in the Sawflies has twospurs, in the Wood-borers insects vary also in the form and proportion of theLabium of Sawfly—Trichiosoma. ,, thorax. Division I.—The Sawflies.—The Sawfly, or Ten-thredo* (, fig. 1) is amongst the most easily recog-nised of insects, its form and general appearance readilydistinguishing it from all other insects except its alliesthe Woodborers. From these, as has been said above, itmay at once be known by the two spurs on the fore leg,a character the more useful as it does not entail thenecessity of dissection, and is available in either sex. The body of the Sawfly is of nearly equal widththroughout, the head usually, but not always, rathernarrower than the thorax. The thorax and abdomenare nearly equal in width, and the sides of the abdomen. * The name Tenthredo is used because it is familiar as bayiug formerlybeen that of nearly the whole family. The name is now restricted to onotypical genus of the Tenthredinidse. HYMENOPTERA.—TEREBRANTIA. 157 in many instances nearly parallel, except towards theend, which is always pointed. The antennse vary considerably, not only in the genera,but even in the sexes. They are sometimes club-shaped(Cimbex), sometimes long and thread-like (Tenthredo)with many joints of nearly equal length ; whilst sometimes(Hylotoma), they consist of but three joints, two veryshort, and the third forming nearly the whole of theantennae. The number of joints varies from 3 to 30. Theantennae of the males are sometimes exceedingly beautifulin form. In one species it is feathered and Iesembles thatof the Silkworm-moth. In another, the last joint (whichforms nearly the whole length of the antennae) is
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Keywords: ., bookauthorme, bookcentury1800, bookdecade1870, booksubjectinsects
