Hymenoptera. 183 



the front with silvery pubescence ; eyes converging at the 

 top and separated by more than twice the length of the 

 third antennal joint ; a r»-shaped depression on the 

 vertex, which has no dilatations, nor has the front ; 

 clypeus broadly rounded, almost transverse at the apex. 

 The silvery white hair on the thorax is moderately thick 

 and long ; the median segment is depressed in the centre. 

 Abdomen with the segments brownish-white at their 

 junction and bearing a fringe of silvery hair, which is 

 especially thick laterally ; pygidial area densely covered 

 with bristly silvery hair ; the apex almost transverse, pro- 

 jecting laterally into a pale tubercle. Legs densely covered 

 with silvery hair ; the bristles pale ; the apex of fore tarsi 

 dull rufous ; tibiae sparsely spinose. The second recurrent 

 ncrvure is received a little beyond the middle ; and the two 

 recurrent nervures are separated by a little shorter space than 

 the length of the second cubital cellule at the top ; the 

 second cubital cellule being there slightly shorter than the 

 third. This species belongs to the genus TacJiysphex 

 (Kohl). 



