1922] Melander — Microsania, a New Genus of the Platypezidce 45 



having a heavily thickened stigma formed about the shortened 

 first vein. 



Microsania departs from all empid genera in possessing a 

 large and inflexed hypopygium and a single median row of 

 acrostichal hairs. The anal crossvein continues toward the 

 hind margin of the wing forming a pointed anal cell and this im- 

 portant phyletic character thus suggests the Hybotinae. Micro- 



Microsania peclipennis Meig. 

 Male X 20. 



sania differs from all the members of this subfamily in the 

 interrupted setulose costa, open venation and short fleshy pro- 

 boscis, and shows no evident relationship to this group. 



The platypezid traits of Microsania are as follows: The 

 antennal excision of the eye is no stronger than in Opetia; strong 

 interf rental bristles are present; the arista has two basal joints; 

 the proboscis is short and fleshy; the notopleural suture is very 

 short and above it is a vertical row of notopleural bristles; 

 posthumeral bristles are present; the middle tibise have strong 

 apical bristles; the hind tarsi are large, compressed and sericate 

 within; the pedicel of the second and third veins is long, and a 

 distinct alula is visible. Such differences as the large broad palpi, 

 swollen clypeus of the female, more bristly thorax, rounder 

 coxae and pectinate hind legs, and short bristly costa and open 

 neuration are no more empidine than platypezine. 



Three species of Microsania are known: pallipes, with light 

 colored legs; stigmaticalis, with minute costal setulae; and pecti- 



