. Injurious and useful insects; an introduction to the study of economic entomology. Insects; Beneficial insects; Insect pests. The hive-bee 8s Lbr Mn trunk.* When the bee explores a deep flower^tube, the proboscis is fully extended. Supported at its base by the maxillae and labial palps, it is firm enough for penetration into a narrow space, while its split tube, completed by the sheathing parts, renders it effective in sucking. When no longer in action, the proboscis can be retracted and folded like a carriage-step. Thus folded, it is completely hidden from view in a cavity behind the head.
. Injurious and useful insects; an introduction to the study of economic entomology. Insects; Beneficial insects; Insect pests. The hive-bee 8s Lbr Mn trunk.* When the bee explores a deep flower^tube, the proboscis is fully extended. Supported at its base by the maxillae and labial palps, it is firm enough for penetration into a narrow space, while its split tube, completed by the sheathing parts, renders it effective in sucking. When no longer in action, the proboscis can be retracted and folded like a carriage-step. Thus folded, it is completely hidden from view in a cavity behind the head. The thorax consists of the usual three segments, but to these the first abdominal is firmly attached. The greatly contracted second abdominal segment forms the narrow waist, the articulation between it and the complex thorax being extremely mobile. In some wasps, ichneumons, and other Hymenoptera the waist is long; in bees it is so short that the abdomen seems at first sight to be attached by its whole breadth to the thorax, and the real state of matters is only discovered by bending down the ab- domen. The prothorax, or first thoracic segment, has a - peculiar structure, the side-pieces being prolonged upwards and downwards so as to form a ring-like piece, which articulates with the head and carries the fore legs. The proper ventral half of the prothorax (prosternum) is firmly attached to the great central mass of the mesothorax. The tergum of the prothorax (pronotum) is developed in the form of the "collar," which looks like a distinct segment, and has often been so interpreted. The head and fore legs acquire, in consequence of the detachment of the prothoracic ring, an unusual power of rotation upon the hinder part of the thorax. The arrange- ment is quite similar in principle to what we find in the first and second vertebrae of man and quadrupeds, where part of * The " tongue" of the bee is often identified with a projection of the floor of the mouth, te
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1902
