MYCETOPHILID^E. 7 



a a. Tibia*, with extremely minute spines, or without spines. 

 b. With wings and halteres. 

 c. Cubital vein not forked. 

 d. Subanal vein forked. 



e. Tibiae with long spurs. 9. LEPTOMORPHUS. 

 e e. Tibiae with very short spurs. 11. MYCETOBIA. 

 d d. Subanal vein not forked. 



e. Hind tibiae with very minute spines. 10. DIADOCIDIA. 

 e e. Hind tibiae without any spines. 

 /. Antennae fifteen- or sixteen-jointed in both sexes. 

 g. Fore fork of the subapical vein straight. 

 h. Antennae bare, or nearly so. 12. SCIARA. 

 h h. Antenna pilose, verticillate in the male. 15. 



LESTREMIA. 

 g g. Fore fork of the subapical vein much curved. 14. 



ZYGONEUEA. 



//. Antennae eleven-jointed. 16. CECIDOGONA. 

 ///. Antennae of the male sixteen-jointed, of the female 



ten-jointed. 17. CATOCHA. 

 //// Antennae nine-jointed. 18. AN ARETE. 

 ///// Antennae fourteen- to fifteen-jointed. 19. CAM- 



PYLOMYZA. 

 c c. Cubital vein forked. 



d. Wings pubescent. 20. DITOMYIA. 

 d d. Wings not pubescent. 



e. Antennae short, stout. 21 . PLATYURA. 

 e e. Antennae long, slender. 

 f. Subcostal vein ending at much before half the length of 



the wing. 22. MACROCERA. 

 ff. Subcostal vein ending at about half the length of the 



wing. 23. BOLITOPHILA. 

 b b. No wings nor halteres. 13. EPIDAPUS. 



Note. " I find, first, a group in which the prsebrachial and po- 

 brachial areolets are confluent, the prsebrachial vein being faint or 

 obsolete; second, a group in which the prsebrachial areolet is 

 entirely separated from the pobrachial by a distinct preebrachial 

 vein, but the pobrachial is but open to the posterior margin, and 

 not closed by a transverse vein. 



"Of the first group, some (BolitopMla) have the pobrachial 

 much shorter, so that the compounded areolet is irregular in form 

 (so it is also in Orphnephila, in Earn. Heteroclita). The rest have 

 the two brachial areolets conterminous, forming, united, one areo- 

 let, with a broad apex (Macrocera, Mycetobia, Ditomym, Diadoci- 

 dia, Asindulum, Platyiira., and Ceroplatus). Of these, Diadocidia 

 differs from all the rest, in having a simple cubital vein, instead of 

 the forked one in the others ; the forks in Mycetobia spring toge- 



