64 Families and Gkxeka of 



A G R O M Y Z I D iE. 



Front with strong bristles ; border of the mouth witli a vibrissa 

 on each side. Middle tibia? with a terminal spur ; all the tibia; on 

 the exterior side without erect bristle before tiie tip. Wings with- 

 out bristles on the costa ; first longitudinal vein very sliort, and the 

 auxiliary vein connected with it at the tip ; basal cells e\isting, but 

 small ; posterior transverse vein generally far distant from the bor- 

 der of the wing. 



P H Y T O M Y Z I U ^.. 



Front bristly ; border of the mouth with vibrissas on each side. 

 Middle tibia; with spurs ; all the tibi;e without erect bristle on the 

 exterior side. Wings without bristles on the costa ; first longitudi- 

 nal v-ein very short ; auxiliary vein connected with it at the tip ; 

 basal cells existing, but small ; posterior transverse vein wanting. 



ASTE 1D.«. 



Front bristly above; border of the mouth with a vibrissa at each 

 side. Middle tibicC with spurs ; all the tibia without erect bristle on 

 the exterior side. Wings without bristles on the costa ; first longi- 

 tudinal vein exceedingly short ; auxiliary vein connected with it 

 only at the tip ; second longitudinal vein very short ; two posterior 

 basal cells as well as the posterior transverse vein wanting. 



BORBORID^. 



Thorax, scutellum, and abdomen flat ; front bristly ; face exca- 

 vated, witli a vibrissa on each side of the border of the mouth ; 

 clypeus developed; first joint of the posterior tarsi abbreviated. 

 Neuration of the wing incomplete, only a commencement of the 

 auxiliary vein being at best visible ; the hindmost two basal cells 

 are not complete in all genera. 



PHORIU^. 



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

 ed ; face very short, oral oiJening large. Front broad in both sexes ; 

 ocelli present. Antenna; apparently one or two-jointed, the termi- 

 nal joint round, with a dorsal or apical bristle. Abdomen rather 

 short, narrowed posteriorly ; genitalia of male often prominent, in 

 the female projecting. Coxic elongate, the femora more or less, the 

 hind pair often extraordinarily, widened and flattened. Wings 

 large; on the anterior part with two strong veins, not reaciiing be- 

 yond the middle, from which from three to five weak veins appa- 

 rently arise and run across the wing. 



The larva; feed upon living or dead snails, beetles, hymenoptera and 

 lepidoptera, or on fungi, decaying vegetables, etc. The flies have a 

 peculiar hunchback appearance, rapidly running liither and thither. 



