Handbook of medical entomology . of the common hornet and finds that, like thepoison of the honey-bee, it is neither an albiiminoid nor an toxic properties are destroyed at 120 C. Phisalix also says thatthe venom is soluble in alcohol. If this be true, it differs in thisrespect from that of the bee. An interesting phase of the work ofPhisalix is that several of her experiments go to show that the venomof hornets acts as a vaccine against that of vipers. NETTLING INSECTS So far, we have considered insects which possess poison glandsconnected with the mouth-parts or a special sting
Handbook of medical entomology . of the common hornet and finds that, like thepoison of the honey-bee, it is neither an albiiminoid nor an toxic properties are destroyed at 120 C. Phisalix also says thatthe venom is soluble in alcohol. If this be true, it differs in thisrespect from that of the bee. An interesting phase of the work ofPhisalix is that several of her experiments go to show that the venomof hornets acts as a vaccine against that of vipers. NETTLING INSECTS So far, we have considered insects which possess poison glandsconnected with the mouth-parts or a special sting and which actively 44 Poisonous Arthropods inject their poison into man. There remain to be considered thoseinsects which possess poisonous hairs or body fluids which, underfavorable circumstances, may act as poisons. To the first of thesebelong primarily the larvae of certain Lepidoptera. LEPIDOPTERA When we consider the reputedly poisonous larvae of moths andbutterflies, one of the first things to impress us is that we cannot. 30. Another innocent but much maligned caterpillar, the larva of the Regal by M. V. S. judge by mere appearance. Various species of Sphingid, or hawk-moth larvae, bear at the end of the body a chitinous horn, which isoften referred to as a sting and regarded as capable of inflictingdangerous wounds. It would seem unnecessary to refer to thisabsurd belief if it were not that each summer the newspapers con-tain supposed accounts of injury from the tomato worm (fig. 29)and others of this group. The grotesque, spiny larva (fig. 30) ofone of our largest moths, Cither onia re gaits is much feared thoughperfectly harmless, and similar instances could be multipHed. But if the larvae are often misjudged on account of their ferociousappearance, the reverse may be true. A group of most innocentlooking and attractive caterpillars is that of the flannel-moth larvae, Nettling Insects 45 of which Lagoa crispata may be taken as an example. Its larva(fig
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1915
