I NTJIODUCTION. 



IX 



episternum from the epirneron ; j>, a portion of the almost sup- 

 pressed and obsolete metapleurae. To the mesothorax at the sides 

 above are attached in the $ and <3 (ergatoid forms excepted) the 

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

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



Fig. Y i i. 



Details, thorax and legs of of the Dolichoderince. 

 Fig. viii. 



Details, thorax and legs of of the Doryliiue. 



Aculeata. In the fore wing : 1, radial ; 2, costal ; 6, medial ; 

 and 7 & 8, two submedial cells, are always complete ; the others 

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

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

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

 g, </, 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, h, tarsi with 5 joints, the apical joint 

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

 simple. 



The abdomen in the $ and $ is composed of 6, in the rf 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 more slender in the c? than in the . Figs, ix-xiii 

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



