PHOPvlDTIv 95 



met with and may be entirely wanting even in considerable 

 collections of diptera. The larvee live in mushrooms (Ar/ari- 

 rus, Lejjiota). They are flat, oval, with jointed, thread-like 

 processes on the sides of the segments. The puparia are not 

 very different from the larva?. 



TABLE OF GENERA. 



1. Discal cell present. .... ^,^^,fC; • . • • 2 

 Discal cell wanting; fourth lonoitiidiiial vein furcate. 



Vlatycnema Zetterstedt. 



2. Fourth longitudinal vein simple. . . . CALLOMYiA-Meigen. 

 Fourth longitudinal vein furcate. . . . Platypkza Meigen. 



32. PHORID.E. 



Small, hunchback-like, nearly bare species. Plead small, 

 flattened; face very short, oral opening large. Front broad 

 in both sexes; ocelli present. AntenUfE apparently one or 

 two-jointed, the terminal joint round, with a dorsal or apical 

 bristle. Abdomen rather short, narrowed posteriorly; geni- 

 talia of the male often prominent, in the female projecting. 

 Coxa^ elongate, the femora more or less, the hind |)air often 

 extraordinarily widened and flattened. Wings large ; on the 

 anterior part with two strong veins, reaching only a little be- 

 yond tlie middle, from which three to five weak veins appar- 

 ently arise and run obliquely across the wing. 



The small flies of this small family have a pecidiar, hunch- 

 back appearance and are observed running about on fallen 

 leaves, windows, etc. The larvae are cylindrical, thinner in 

 front than behind, and live in dead snails, insects, decaying 

 fu)igi. vegetables, etc., and ])ossibly in living insects. 



TABLE OF (JENEKA. 



L Front entiridy witliout bristles. . . (iYmnoi'Iioisa Mac(|uart. 



Front with long l)ristles. ........ 2 



2. Middle tibiae beset with bristles along the outer side. Tuinkuka Meigen. 

 Middle tibia' with few or no bristles on the outer side. Puora Latreille. 



(2 ^uvv.XXAjS'-^ 



