Insect artizans and their work . . -3 5 H 2 3 T v OSS 9 ,t p -? s. * ij 3 O S3 - &0 57 = -r — 90 u m « js a So * 2 u c 8 S — .a Z-5 CARPENTERS AND WOOD-WORKERS 123 only to press its head against this cap to push itout. Before concluding this chapter a word shouldbe said about the Saw-flies (Tenthredinidae), asnature has provided them with saws, though as arule they only use them upon leaves and greenshoots. It is only the females that are providedwith these useful tools, and they use them forcutting a slit in which to deposit their eggs. A largekind of Saw-fly, however, known as the LargeHo
Insect artizans and their work . . -3 5 H 2 3 T v OSS 9 ,t p -? s. * ij 3 O S3 - &0 57 = -r — 90 u m « js a So * 2 u c 8 S — .a Z-5 CARPENTERS AND WOOD-WORKERS 123 only to press its head against this cap to push itout. Before concluding this chapter a word shouldbe said about the Saw-flies (Tenthredinidae), asnature has provided them with saws, though as arule they only use them upon leaves and greenshoots. It is only the females that are providedwith these useful tools, and they use them forcutting a slit in which to deposit their eggs. A largekind of Saw-fly, however, known as the LargeHorn-tail (Sirex gigas) has, instead, a powerfuldrill with which she bores holes in the bark ofpine-trees for the purpose of laying an egg in eachof the holes she drills. The drill has a protectingsheath in which it lies when not in use. It isthree-quarters of an inch long, and is hinged so asto be used at right angles to the body. The grubwhich issues from the egg is a notable carpentertoo, but it works with its jaws, an
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
