They comprise tlie following subfamilies : — 



a. Head vesiculose, 1. Myopides. 

 a a. Head not vesiculose. 

 b. Alulae large. 

 c. Thorax short. 

 d. Legs moderate. 



e. Arista bare, pubescent, or plumose at the base. 2. Ta- 



CHINIDES. 



e e. Arista plumose to the tip. 5. Muscides. 

 d d. Legs long. 3. Dexides. 

 c c. Thorax long. 4. Sarcophagides. 

 b b. Alulae moderate or small. G. Anthomyides. 



Subfamily 1. MYOPIDES. 



Myopa, Y. Conopsaria p., Fal. ; Meig, Conopidce p.. Lea. ; St. ; Westw. 

 Myoparice, Mcq. ; Zett. Occemydce, Desv. Myopidce, Bigot. 



Caput vesiculosum. Proboscis longa, ffracilis. Alidcs parvce. Abdo- 

 men cylindricum, subtus apice reeurvum. 



Head vesiculose ; front broad. Proboscis long, slender. Arista dor- 

 sal. Wings small ; costal vein ending at the tip of the wing ; sub- 

 costal vein ending at a little before half the length of the fore border ; 

 mediastinal vein ending at a little beyond half the length of the fore 

 border ; radial vein ending at about two-thirds of the length of the 

 fore border ; cubital vein undulating, ending at a little in front of the 

 tip of the wing; praabrachial vein forming an obtuse angle at its junc- 

 tion with the discal transverse vein, joining the costal vein at very little 

 in front of the tip of the latter; discal transverse vein straight, its dis- 

 tance from the hind border one-fourth or one-half of its own length ; 

 axillary and subaxillary veins united at some distance from the border ; 

 anal vein not reaching the border. Alulce small. Abdomen cylindrical, 

 recurved beneath at the tip. Legs stout. 



The species are probably parasites of other insects. The two 

 British genera may be thus divided : — 



Tone joint 1. Zodion. 



Proboscis with \ 



t two joints 2. Myopa, 



Genus L ZODION. 



Zodion, Latr. G. C. iv. (1809) ; Meig. ; Mcq. ; Desv. ; Germ.; Westw.; 



Zett. Myopa p., F. ; Fal. 

 Caput subglabrum. Os nudum. Proboscis Last f/eniculata. Antonme 



