IV. TIPHIA, 39 
the tegule ; mesothorax narrow; metathorar abruptly trun- 
cated and having on each side a profound cavity; scutellum 
small, transverse ; superior mings with one marginal cell, open 
im the g and closed by a transverse nervure at its apex, which is 
distant from the apical margin of the wing in the & ; two sub- 
marginal cells, the first receiving the first recurrent nervure and 
longer than the second, which receives the second recurrent nervure, 
and at its apex parallel with that of the marginal cell, some- 
times a third submarginal formed by a very slight indication of 
the cubital nervure continued to the apex of the ning: Legs 
short, thick, the thighs enlarged and compressed, particularly 
in the ¢, the exterior of the intermediate and posterior tibie 
thickly set with short teeth or spines; tarsi elongate, their 
joints furnished with verticillate setae, the terminal claws bifid, 
with a small pulvillus placed between them. Aspomen oval, 
distinctly petiolated, the petiole armed on each side near its 
junction with the abdomen with a small tooth; the first seg- 
ment subpyriform and considerably narrower than the second, 
which, with the remainder, form a cone; the hypopygium of 
the g contracting itself into an upcurved spine, which does 
not extend beyond the podex. 
Type, T. femorata. 
{4+ This genus, the name of which is derived from rigy, 
the name of an insect in AJian, was first established in 1775 
by Fabricius, in his Systema Entomologiz, but he included 
several other genera in his enumeration of the species, which 
have since been separated by Latreille and Jurine. _ Illiger 
was not aware that the neuration of the wings slightly dif- 
fered in the two sexes, and consequently divided them into two 
sections, the one comprising the ¢ and the other the g¢. 
Sp. 1. Femorata. Fab. 
pilosa nigra ( femoribus quatuor posticis compressis rufis, 9) 
linea intermedia elevata metathoracis lineam transversam non 
attingente @ 4. 
length 3—6 lines. 
