HERIADES. 289 



rather broadest at the base and slightly waved late- 

 rally, concavo-convex and subemarginate at the apex ; 

 mandibles subequal, tridentate at the apex, and the cen- 

 tral tooth obtuse ; cibarial apparatus moderately long, 

 tongue twice the length of the labium, with a small 

 knob at its apex ; paraglossce very short, almost obsolete, 

 coadunate at the base ; labial palpi two-thirds the length 

 of the tongue, the two first joints membranous and long, 

 the first one-third the length of the second, which 

 tapers to its acute extremity, before the end of which 

 the two terminal, subclavate, very short, subequal joints 

 are inserted; labium half the length of the tongue, 

 slightly produced in the centre of its inosculation; 

 maxiUce subhastate, two-thirds the length of the tongue ; 

 majnllary palpi three-jointed, short, robust, equal, and 

 collectively subfusiform, the terminal one rather acute. 

 Thorax globose ; prothorax inconspicuous ; scutellum 

 lunulate ; post-scutellum linear, transverse ; metathorax 

 declining; wings with two submarginal cells, and the 

 commencement of a third indicated, the second larger 

 than the first, subtrlangular, and receiving both the 

 recurrent nervures, one at each of its extremities ; legs 

 short, rather robust, subsetose and spinulose ; posterior 

 tibice convex externally and with their plantse rugose, 

 the latter covered beneath with a dense brush of short 

 hair; cZaws simple. Abdomen cylindrical, convex above, 

 retuse at the base, and the first and second segments 

 slightly constricted at their extremity, obtuse, and from 

 the end of the third segment sensibly declining to the 

 apex ; plane on the venter, where, from the second seg- 

 ment, the plate of each, excepting the glabrous terminal 

 one, is covered with a dense brush of short hair for the 

 conveyance of pollen. 



V 



