A Monograph of Egyptian Dipt era. 27 



Wings pellucid, with the stigma brown or brownish-yellow. 

 Squamulse yellowish-white. Halteres very pale yellow, with the 

 base dark brown. 



Female. — Very similar to the male, except the frons is rather 

 shining black. 



Length from 6 to 7 mm. 



This species, I think, is the commonest and most widely 

 distributed member of its family in Egypt. 



It is equally abundant throughout the whole length of the 

 Nile Valley, from Assuan down to the Mediterranean Coast as well 

 as in the desert and it may be found nearly all the year round. 



It is known to occur in Syria, North Africa, and it probably 

 occurs along the Mediterranean Coast to Morocco. 



The larvas feed on Aphids (see Page 22). 



