. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. Order 9. HYMENOPTERA. 583 others, but Avhich are membranous. This family is composed of two tribes, [the Tenthredinetee and Urocerata]. The Tenthredinet.*:—, Or Saw-flies [as they are commonly called, from their saw-like ovipositor], have the mandibles long and compressed, the lower lip divided into three lobes, the ovipositor composed of two plates, toothed like a saw, united, and lodged in a channel beneath the anus ; the maxillary palpi are alway
. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. Order 9. HYMENOPTERA. 583 others, but Avhich are membranous. This family is composed of two tribes, [the Tenthredinetee and Urocerata]. The Tenthredinet.*:—, Or Saw-flies [as they are commonly called, from their saw-like ovipositor], have the mandibles long and compressed, the lower lip divided into three lobes, the ovipositor composed of two plates, toothed like a saw, united, and lodged in a channel beneath the anus ; the maxillary palpi are always composed of six joints, and the labial of four ; the wings are always divided into numerous cells. This tribe is composed of the genus Tenthredo, Linn. The abdomen is cylindric, rounded behind, 9-jointed ; the form of the antennae varies ; the mandibles are strong and toothed ; the maxillary palpi are filiform and 6-jointed ; the lower lip is divided at the apex into three lobes; the labial palpi are only 4-jointed. It is with the alternate motion of the saws of the ovipositor that these insects make a succession of small holes in the branches or other parts of trees, in each of which an egg and a drop of frothy liquid are discharged, the latter of which has the effect of closing the hole. The wound thus made becomes more and more convex by the increase in size of the egg, and sometimes these parts assume the form of a gall, either woody or pulpy, according to the parts injured; these tumours form the abode of the larvae which reside within them, and the insect makes with its teeth a circular hole for its escape. But in general these larvae are external feeders, devouring the leaves. They greatly resemble the Caterpillars of Lepidopterous insects, but have from eighteen to twenty-two feet, or only six, which distinguishes them from caterpillars, which have from ten to sixteen feet. Many of these false caterpillars roll themselves into a spire, and others have the extremity
Size: 2059px × 1214px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorwe, bookcentury1800, bookdecade1860, booksubjectzoology
