INTRODUCTION. 



IX 



epistei'uuiii from the epimeron ; j), a portiou of the ahuost sup- 

 pressed and obsolete metapleurae. To the mesothorax at the sides 

 above are attached iu the $ and c? (ergatoid forms excepted) the 

 fore wings, and to the sides of the metathorax the hind wings ; 

 the neuration of the wings is less complete than iu most of the 



Details, — thorax and legs of ^ of the BolicJiodenme. 

 Fig. viii. 



Details, — thorax and legs of ^ of the Borylina. 



Actdeata. In the fore wing : — 1, radial ; 2, costal ; G. medial ; 

 and 7 & S, two submedial cells, are always complete ; the othera 

 are variable and may or may not be present, complete or incom- 

 plete. Three pairs of legs are present in all the sexes, the parts 

 of which as shown are e, e, coxae : /, /, trochanters, single-jointed ; 

 f/, ;/, femora; h, h, tibiae ; i, i, tibial calcaria, which may or may 

 not be present on all the legs, are often double, and may be 

 pectinate or simple ; /^ h, tarsi with 5 joints, the apical joint 

 armed with two claws, which may be pectinate, dentate, or 

 simple. 



The ahdoiiUii in the $ and ^ is composed of 6, in the S of 

 7 visible segments, and is, like the rest of the parts in ants, very 

 variable, generally more massive and comparatively longer in the $ , 

 smaller and moi'e slender in the S than in the ^ . Figs, ix xiii 

 show some of the forms obtaining in the various subfamilies ; tJK? 



