SPHEGIDAl. mi 



basal area indefinite ; abdomen black, shining, with large 

 yellow lateral spots or continuous bands on all the segments, 

 basal segment hairy above, apical dorsal valve in the ? very 

 narrowly acuminate and sulcato, densely clothed at the sides 

 with long bristly yellow hairs, apical ventral valve largely 

 punctured towards the apex, stipites of $ genital arma- 

 ture fringed externally with very long hairs, second ventral 

 segment with a dull round spot on each side in both sexes ; 

 legs yellow, the femora entirely black except at the apex 

 in the ? , more or less black, especially posteriorly in the $ , 

 tibiae in the J sometimes black posteriorly, densely spinose 

 in the $ . 



L. 12-15 mm. 



Common, and generally distributed. 



The arrangement of the ocelli distinguish this species 

 from chrysostomus, and the dentate antennae of the (J and 

 the form of the apical dorsal valve of the $ from vaga- 

 hvndus. 



C. chrysostomus, Lep. — Very like a small cephalotex, 

 but distinguishable in both sexes by the ocelli, which in 

 this species are arranged in a triangle whose base is much 

 longer than its sides; the antennae in the (J are twelve- 

 jointed, and formed much as in cephalofcs, only the fourth 

 and fifth joints are scarcely produced at the apex, the 

 channel Ijetween the antennaa is wider and less deep in both 

 sexes, the basal area of the propodeum is strongly and 

 diagonally strigose, and defined posteriorly by a distinct 

 carina, behind which the strife are transverse, it is divided 

 down the centre by a crenate sulcature ; abdomen marked 

 much as in ccjjhalotes, only the yellow spots are less exten- 

 sive, especially in the S , i^ which sex the centre of the 

 abdomen above is widely black ; tibite in the ? black 

 beneath, and less spinose than in ccpha/utes, posterior tarsi 

 and intermediate tibia3 in the J often entirely black. 



L. 10-12 mm. 



Not rare ; makes its nests in decaying wood. 



