PHORIDJE. 95 



met with and may be entirely wanting even in considerable 

 collections of diptera. The larvae live in mushrooms (Agari- 

 cus, Lepiota). They are flat, oval, with jointed, thread-like 

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

 very different from the larvae. 



TABLE OF GENERA. 



1. Discal cell present. ........ .2 



Discal cell wanting ; fourth longitudinal vein furcate. 



PLATYCNEMA Zetterstedt. 



2. Fourth longitudinal vein simple. . ... 



Fourth longitudinal vein furcate. . . . PLATYPEZA Meigen. 



32. PHORIM:. 



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

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

 in both sexes; ocelli present. Antennas apparently one or 

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

 bristle. Abdomen rather short, narrowed posteriorly ; geni- 

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

 Coxae elongate, the femora more or less, the hind pair often 

 extraordinarily widened and flattened. Wings large ; on the 

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

 yond the 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 peculiar, 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 

 fungi, vegetables, etc., and possibly in living insects. 



TABLE OF GENERA. 



1. Front entirely without bristles. . . GYMNOPHOKA Mac-quart. 

 Front with long bristles. . . . . . . . . 2 



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

 Middle tibiae with few or no bristles on the outer side. PIIORA Latreille. 



