. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. HYMEXOPTERA. 591 moveable head with large facetted eyes -which in the male are almost in contact, and three ocelli (fig. 486). In the antennfe a large basal joint (shaft) and eleven to twelve shorter joints can usually be distinguished, or they are not crooked, in which case they consist of a greater number of joints. The mouth parts are biting and licking; the upper lip and man- dil)les are constructed as in beetles and Orthoptera; the maxillte and labium, on the other hand, are elongated and adapt
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. HYMEXOPTERA. 591 moveable head with large facetted eyes -which in the male are almost in contact, and three ocelli (fig. 486). In the antennfe a large basal joint (shaft) and eleven to twelve shorter joints can usually be distinguished, or they are not crooked, in which case they consist of a greater number of joints. The mouth parts are biting and licking; the upper lip and man- dil)les are constructed as in beetles and Orthoptera; the maxillte and labium, on the other hand, are elongated and adapted for licking, and when at rest are frequently bent round. In bees the tongue can be considerably elongated and assume the foi-m of a proboscis; in this case the lobes of the jaws also become considerably extended, and form a kind of sheath around the tongue. The maxillary palps are usually six-jointed; the labial palps on the other hand only four-jointed, but the number of joints may be reduced. As in the Lejndojytera and Diptera, the prothorax is firmly con- nected Avith the following thoracic segments, inasmuch as the. Fig. 430.âApis melliflca. a, Queen, i, Worker, c, Drone. pronotum at least (excepting in the leaf- and ) is fused with the mesonotum, while the rudimentary presternum remains freely moveable. On the mesothorax two small moveable scales (tegulce) are found over the base of the forewing, and behind the scutellum the anterior part of the metanotum is developed into the posterior shield {2)ostscutellum). Both pairs of â ndngs are membranous, transparent, and traversed by but few ner\-ures; the anterior are considerably larger than the posterior. From the outer edge of the latter small hooks arise, which are attached to the inferior edge of the anterior pair, thus bringing about the connection between the two pairs of wings. Sometimes the wings are absent in one of the two sexes, or in the workers amongst many social HymenoiJtera. The legs possess fiv
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
