1891.] 87 



22 Apical cross vein deficient 10. AcTiA, Dsv. 



23 (2) Arista with the second joint short.* 



2-1. (65) Facial edges {facialia) unarmed, or ciliated only along their lower part. 



25 (26) External (discal) cross vein extremely oblique 11. Pi.aoia, Mgii. 



26 (25) External cross vein straight or only moderately oblique. 



27 (46) Eyes hairy. 



28 (13) Third joint of the antenn® not more than twice the length of the second, 



and often less. 



29 (30) Colour bright gold-green 12. Gymnocheta, Dsv. 



30 (29) Colour generally black or grey.+ 



31 (34) Eyes of the male subcontiguous. 



32 (33) Arista pubescent 13. Macquartia, Dsv. /n, 



33 (32) Arista bare : 14. Polidea, Mcq. 



34 (31) Eyes of the male more or less widely separated. 



35 (40) Abdomen wide and oval. 



36 (37) Eyes much shorter than the face 15. Nemok.ea, Dsv. 



37 (36) Eyes prolonged to near the bottom of the face. 



38 (39) Cheeks hairy ; abdominal segments without discal sctre .. 



16. Chetoliga, End. 



39 (38) Cheeks bare ; abdominal segments with setae on the disc . 



17. Nemorilla, End. 



40 (35) Abdomen oblong. 



41 (42) Colour grey and red 18. Olivieeia, Dsv. 



42 (41) Colour shining black without red 19. ZophomyiA, Mcq. 



43 (28) Third joint of the antennee always twice (or more than twice) the length 



of the second. 



44 (45) Third joint of antennae very convex in front ..20. Epicampocera, Mcq. 



45 (44) Third joint of antennae nearly straight in front 21. Exorista, Mgn. 



46 (27) Eyes bare. 



47 (58) Third joint of the antennae not more (and often less) than twice the length 



of the second. 



48 (49) Second joint of antenna} somewhat prolonged 22. Tachina, F. 



49 (48) Second joint of antenna; not prolonged. 



50 (51) Forehead prominent ; arista pubescent at the base, cheeks ciliated \ 



23. Brachycoma, Dsv. \\.]\X' 



51(50)(52) Head wide and swollen, arista and cheeks bare 



24. MiLTOGRAMMA, MgU. 



52 (51) Head neither wide nor swollen. 



53 (54) Antennae with the third joint short and round 25. Trixa, Mgn. 



54 (53) Antennae with the third joint oblong. 



55(56)(57) Abdomen subglobose 26. Clttia, Dsv. 



56(55)(57) Abdomen rather flattened 27. Macrontchia, End. 



57(55)(56) Abdomen slender and oblong 28. Myobia, Dsv. 



* In some species it is slightly prolonged, in others it can scarcely be distinguished from the 

 first joint. 



t In some species the colour may be metallic-bhte or M'lieous, but never bright green. 



