. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests -- Periodicals; Insects -- Ontario Periodicals. i'ig. y. the males carry the very curious palpal organs, which are employed in the fertilization of the female. The basal joints, Fig. 7, E E, of the palpi are flattened out, and serve as chewing organs, — they are called max- illce. The front pair oi limbs, the Mandibles, Eig. 7, D D, have two joints, the basal one is usually short and stout, and furnished on the inner side with teeth and hairs ; the other is a small, sharp claw, which can be close
. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests -- Periodicals; Insects -- Ontario Periodicals. i'ig. y. the males carry the very curious palpal organs, which are employed in the fertilization of the female. The basal joints, Fig. 7, E E, of the palpi are flattened out, and serve as chewing organs, — they are called max- illce. The front pair oi limbs, the Mandibles, Eig. 7, D D, have two joints, the basal one is usually short and stout, and furnished on the inner side with teeth and hairs ; the other is a small, sharp claw, which can be closed against the basal joint when not in use. (See also Figures 19 and 20.) The Abdomen, or hinder half of the body, is furnished, just behind the legs, with two hard, smooth patches, which cover the front pair of breathing-organs, the openings to which are two little slits at Fig. 7, H. At the end of the are the spinnerets, which will be described fu-'-'ier on. There are three pairs of them ; but many spiders close them together when not in use, so as to cover up the middle pair. Sometimes the third pair of spinnerets have several joints and extend out behind the body like two tails. In front of the spinnerets is a little opening, Figure 7, K, which leads to air-tubes that give off branches to different parts of the abdomen. At M, Figure 7, are usually two coloured bands, or rows of spots, marking the course of muscles attached to the skin at various points along these lines. Let us now turn to figure 10, which repre- sents the upper surface, or back of the same spider. The head is not separated from the rest of tlie body, as in insects, but forms one piece with the thorax. On the front of the head are eight simple eyes, O, which are differently arranged in different spiders. At the back of the thorax is a groove, P, under which is at- tached a muscle for moving the sucking stomach, Figure 11, D. From this point radiate shallow ,'rooves, that follow the divisions between
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