A Monograph of Egyptian Dipt era. 1 1 5 



CERIOIDIINLE. 



Medium sized or moderately large, bare and elongate flies 

 which are exceedingly like the Conopidce and some of the smaller 

 wasps (Vespidce). They are characterised by the antennae which 

 are very often placed on a long petiole and which are elongate, 

 porrected and with a terminal style, and by the wings which 

 possess usually the costal border as far the vena spuria darkened, 

 and an Eristalis-like loof> in Radius 4 + 5, from the bottom of 

 which a peculiar veinlet almost bisects the cell beneath (R5) as in 

 the Microdontince ; Radio-median cross vein placed after the 

 middle of cell M2. 



There is so far only about 70 species of this very distinct 

 and sharply defined group known. They seem to be chiefly 

 represented in Central America and Africa but they also occur in 

 Europe, North America, Tasmania, India, Jamaica, Asia Minor 

 and Japan. 



Very little is known about the metamorphoses of this group. 

 Verrall states that C . conopsoides has been bred from flowing sap, 

 but I strongly suspect them to posses some relation with Hymenop- 

 tera, especially ants. 



