. The animal creation: a popular introduction to zoology. Zoology. HYMEXOPTEKA. 147 Avhich in some species serves for the deposition of the eggs, but in others is connected with a poison- bag, and forms a venomous sting. To this Order belong The Saw Flies (Tenthredo). They derive their name from a cin-ionsly-eonstructed instrmnent called an ovi- positor, with which the female is provided. This con- sists of a saw composed of two blades that work alter- nately, by means of which she makes incisions in the branches of plants, wherein she deposits her eggs. The wounds thus made by the teeth of th
. The animal creation: a popular introduction to zoology. Zoology. HYMEXOPTEKA. 147 Avhich in some species serves for the deposition of the eggs, but in others is connected with a poison- bag, and forms a venomous sting. To this Order belong The Saw Flies (Tenthredo). They derive their name from a cin-ionsly-eonstructed instrmnent called an ovi- positor, with which the female is provided. This con- sists of a saw composed of two blades that work alter- nately, by means of which she makes incisions in the branches of plants, wherein she deposits her eggs. The wounds thus made by the teeth of the sav^ frequently cause the plant to swell into a fleshy mass resembling a. Fig. 1 SATv' OF SAW FLY. small fruit, in the interior of which the larvte find the materials for their subsistence. The larvae very much resemble caterpillars, from which, however, they are easily distinguished by the number of their feet; before changing into nymphs, the false caterpillars enclose themselves in a cocoon, in which they remain many months in their caterpillar condition, only becoming changed into nymphs a few days before their final conversion into Saw flies. In the spring-time of the year, when the bright leaves of our gooseberry-bushes first make their appearance, they are often devoured in a remarkable manner, even before they have completely concealed the straggling spiny branches. ^ If the injury stopped here, with the despolia- tion of his gooseberry-bushes, the gardener might perhaps put up with it without much grumbling; but unfortunately the production of leaves and fruit are intimately connected, and unless the branches are well clothed v/ith the former, the crop of the latter will be very small. If we search TT o. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jones, Thomas Rymer, 1810-1880. London : Socie
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Keywords: ., bookauthorjo, bookcentury1800, bookdecade1860, booksubjectzoology
