. Synopsis of the families and genera of the Hymenoptera of America, north of Mexico [microform] : together with a catalogue of the described species and bibliography. Hymenoptera; Hyménoptères. 6 GENERA OF HYMENOPTERA. ^ ••. The Le(4S (fig. 6) are generally long and slender, often short and robust, pubescent, bristled or spined, sometimes more or less deformed. The first joint, or that by which they are attached to the body, is called the coxa (^a) and is variously shaped and rarely spined; at the extremity of the coxa and between it and the femur is a small piece, often two-jointed, called t
. Synopsis of the families and genera of the Hymenoptera of America, north of Mexico [microform] : together with a catalogue of the described species and bibliography. Hymenoptera; Hyménoptères. 6 GENERA OF HYMENOPTERA. ^ ••. The Le(4S (fig. 6) are generally long and slender, often short and robust, pubescent, bristled or spined, sometimes more or less deformed. The first joint, or that by which they are attached to the body, is called the coxa (^a) and is variously shaped and rarely spined; at the extremity of the coxa and between it and the femur is a small piece, often two-jointed, called the irochmter (b), this is usually short and small, although in the ditrocha groups it varies considerably in form and length. The first long piece of the legs is called the thigh or femur (c), and following it is the tibia (d); at the extremity of the latter are (me or two movable spines called tibial spurs (e), which are, however, sometimes absent. Following the tibia is a series of joint'i, generally five in number, constituting the foot or tarsus (f), the last joint usually bears two daws (g), either simple, toothed or cleft, and often furnished at their base within with a membranous or cushion- like appendage called puhillus, which is occa- sionally much enlarged and sometimes wanting. These parts of the legs vary greatly in the dif- ferent families, being fitted either for walking, digging or collecting pollen ; in the latter form they are furnished with more or less dense hairs, the tibia and base of tai-sus being flattened and dilated ; those formed for digging are robust and bristly or spinose. The femur is often r<)bust, and sometimes spined beneath, and in some Chalcids the posterior pair is enormously developed and denticulate beneath; the tibia and tarsus also vary much in structure; in some genera of Proctotru- pidae, the anterior tarsus is terminated by curious large reflexed claws which open and shut somewhat like those of a lobster, while in some of the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjecthymenop, bookyear1887
