6 



(JKNERA OK IlY.Mi;N()rTi:KA. 



Tlu' Li;(;s (fifr- ^) are jrenerally long and slender, often short and 

 robust, pubescent, bristled or spined, sometimes more or less deformed. 

 The Hi-st joint, <>r that by which tlicy are attached to the body, is 

 called the cu.t<i (in 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 tlie irochmier (b), this is usually -liorl and 

 small. althoULrli in the diiioclia groups it varies considerably in iui-in 

 anil leiiL'th. The lirst 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 one or two movable spines called libidl spurs (e), which 

 are, however, sometimes absent. Following the tibia is a series of 

 joints, generally five in number, constituting the foot or tarsus (f ), 



the last joint usually bears two dau's (g), either 

 simple, toothed or cleft, and often furnished at 

 their base within with a membranous or cushion- 

 like appendage called j)ulvi/his, which is occa- 

 sionally much enlarged and sometimes wanting. 

 These parts of the leg's vary greatly in the dif- 

 ferent families, being fitted either for walking, 

 digging or collecting pollen ; in the latter form 

 they are furnished w ith more or less dense hairs, 

 the tibia and base of tarsus being flattened and 

 dilated ; those formed for diijji-in"; are robust anil 

 bristly or spinose. The femur is often r<)bust, 

 and sometimes spined beneath, and in some Chalcids the jiosterior 

 j)air is enormously developed and denticulate beneath ; the tibia and 

 tai*sus also vary much in structure ; in some genera of Proctotru- 

 pida?, 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 males of the leaf-cutting bee, Mer/aclu'/c, it is broadly 

 dilated and fringed with long haii-s ; these and other niodifieations 

 (»f form are conseijuent upon divei*sity of economy. 



The Anoo.MKN (figs. 7 and -S ) is exceedingly variai)U' in tlu' num- 

 ber of its segments, especially in the ditrocha groups, while in the 

 Ants, Wasps and Bee.s, it is com|)osed of seven segiueius in tlie males 

 and six in tlie females. In luriii it varies givatlv, beiug ovate, glo- 

 bose, clavate, eylindrical, liisiform, sickle-shaped, knife-shaped, etc., 

 and in .some species it is .se.<sile (fig. 7 ), i.e. connected with the th(jrax 

 by i|uite or nearly its entire breatlth. and in others petiolate (fig. 8), 



Fig. 6. 



a, coxa ; b, trochan- 

 ter; c, femur ; d, tibia; 

 e, tibial spurs ; f, tarsus ; 

 g, tarsal claws. 



