. An introduction to zoology, with directions for practical work (invertebrates). . from the lower lip (labium) and the soft jaws (maxillae). The parts of the proboscis are shown spread out in Fig. 289 ; the maxillae form together the outer horny sheath, and the labium its central portion which consists of the long hairy tongue or ligula, lying in a trough-like lower sheath formed by the labial palps (the maxillae and the two palps are arti- ficially separated in Fig. 289). The free tip of the tongue is a little spoon-like structure; with this the nectar of flowers is lapped up, the hairs of t
. An introduction to zoology, with directions for practical work (invertebrates). . from the lower lip (labium) and the soft jaws (maxillae). The parts of the proboscis are shown spread out in Fig. 289 ; the maxillae form together the outer horny sheath, and the labium its central portion which consists of the long hairy tongue or ligula, lying in a trough-like lower sheath formed by the labial palps (the maxillae and the two palps are arti- ficially separated in Fig. 289). The free tip of the tongue is a little spoon-like structure; with this the nectar of flowers is lapped up, the hairs of the tongue get soaked in the fluid which is then sucked up by the surround- ing tube and passed into the mouth. The mouth - parts are therefore modified in the bee for two quite separate func- tions, , the mandibles chiefly for constructive work in forming the honey - comb, the maxillae and labium for obtaining food. The thorax, which lies behind the head, con- sists of the usual three segments, with also an abdominal segment fused with them as explained on p. 362. Each thoracic segment bears below a pair of jointed legs, and the second and third segments bear also, attached to their upper surface, a pair of delicate, transparent wings. The wings are held together so closely that at first sight there appears to be only one on each side. If they are separated from the body of a dead bee, and examined under the microscope, the method by which this union is maintained can be seen. The front margin of each back wing bears a row of little hooks (Fig. 291), which catch in a groove on the hind margin of the front wings, so that when Pig. 290.—Head of Houey Bee seen from the side, with the Proboscis, «, turned bade below the head. The Thorax. Fig. 289.—The Head of the Honey Bee seen from in front, with the Proboscis extended and its parts spread out. Li, Antenna ; mwd, mandible; mm, maxilla; Ip, labial palp ; I, Please note that these images are extracted from scanned page
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1913
