. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 156 Zoological Society:— Is it possible that these tubes, which, as I have observed, are re- markably similar in appearance to those in the spider's spinneret,. may be of the nature of salivary glands 1 It is easy to imagine the use of such a provision in the management of the materials of the nests and the storing of food, even if not also in the assistance of digestion ; while it appears to me that there is analogy in favour of such a supposition, the House-fly exuding from
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 156 Zoological Society:— Is it possible that these tubes, which, as I have observed, are re- markably similar in appearance to those in the spider's spinneret,. may be of the nature of salivary glands 1 It is easy to imagine the use of such a provision in the management of the materials of the nests and the storing of food, even if not also in the assistance of digestion ; while it appears to me that there is analogy in favour of such a supposition, the House-fly exuding from its mouth a drop of moisture when feeding on sugar or other hard substance, while the Gnat, with still another form of mouth, is supposed to inject a poison into the wound inflicted by its proboscis. I believe that somewhat similar tubes exist in the mandibles of some of the Bees and Wasps. The mandibles of some of the Apidce have a transverse ridge of strong hooked hairs (besides other hairs in various parts). In the mandible of Apis mellifica £ , they are very visible. With the above objects I send specimens of the hind wings of various Hymenopterous Insects, the observation of which has con- firmed me in my former opinion as to their usefulness as distinctions ; but as I have arrived at no new results, not having had the means as yet of representing more than a very limited number of genera, I will only remark on one variation from the usual arrangement of the distal hooks, which occurs in the genera Sphecodes and Halictus. The distal hooks of the Bees are usually at regular or at regularly diminishing intervals; but in these two genera, one or two of those various parts of insects, with the exception of those which he figures Tab. 18. R. a, and which I have mentioned above as tubes " in a cluster close above the maxil- lary ;. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo
Size: 1340px × 1865px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
