PHORA. 277 



chial, anal, and axillary veins represented by four veinlets ; first spring- 

 ing from near the tip of the cubital, slightly curved ; second springing 

 from about the middle of the cubital ; third springing from the basal 

 areolet ; fourth near the hind border. Halteres small. Abdomen ge- 

 nerally narrower and longer than the thorax, attenuated towards the 

 tip, especially in the female ; segments nearly equal in length. Legs 

 rather long, especially the hind pair, with a few bristles ; femora com- 

 pressed ; tibiae a little shorter than the femora ; tarsi a little longer 

 than the femora ; ungues and onychia minute. 



The Phom in the larva state generally feed on decayed vege- 

 table substances, and the species may be distinguished by the 

 variations in the wing- veins of the flies. 

 a. Costal vein ciliated. 



b. Thorax hardly compressed. 



c. Eadial vein emerging from near the tip of the cubital. 

 d. Costal vein ending at beyond half the length of the wing. 

 e. Costal vein ending at much beyond half the length of the 

 wing, emitting a veinlet which extends to full seven-eighths 

 of the length ; mediastinal ending at a little beyond half 

 of the length of the costal. First veinlet much curved 

 near the base, straight and nearly parallel to the fore bor- 

 der from thence to the tip, which ends at the tip of the 

 wing ; second, third, and fourth nearly straight. Sp. 1, 2. 

 e e. Costal vein ending at beyond half the length of the wing, 

 emitting a veinlet which extends beyond five-sixths of the 

 length ; mediastinal vein ending at very little beyond two- 

 thirds of the length of the costal. First veinlet undulating, 

 ending at some little distance in front of the tip of the 

 wing; second and third nearly straight. Species 3. 

 e e e. Costal vein ending at a little beyond half the length of 

 the. wing, emitting a veinlet which extends to about five- 

 sixths of the length ; mediastinal vein at a little beyond 

 half of the length of the costal. First veinlet very slightly 

 curved near the base, straight from thence to the tip, which 

 ends at very little in front of the tip of the wing ; second 

 and third slightly undulating. Species 4, 5. 

 e e e e. Costal vein ending at very little beyond half the length 

 of the wing, emitting a veinlet to beyond five-sixths of the 

 length ; mediastinal vein ending at beyond two-thirds of 

 the length of the costal. First veinlet undulating, ending 

 at very little in front of the tip of the wing ; second and 

 third nearly straight. Species 6. 



e e e e e. Costal vein ending at very little beyond half the 

 length of the wing, emitting a veinlet which extends to 

 about five-sixths of the length ; mediastinal vein ending at 

 much beyond half the length of the costal. First veinlet 



