ee) 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
20. 
DIPTERA. 
Third joint of the antenne as long as or longer than the second 
. First posterior (apical) cell ending “istinetly before the apex of 
the wing .. . 
First posterior (apical) cell ending at or very near the a apex of 
the wing 
. Palpi rudimentary or absent 
Palpi fully developed . . . . . rn 
Eyes hairy ; fourth vein prolonged at its point of curvature 
Eyes bare; fourth vein not prolonged at its point of curvature 
Cheeks with one or more distinct bristles . 
Cheeks without bristles . 
Arista distinctly jointed . 
Arista not jointed, or at the most with a har dly visible soint 
at the extreme base. Lee oe ee 
Antenne short and broad; arista not nicked ; head not 
swollen ; frontal bristles rather stout . . . 
Antenne long and slender; arista nicked; head, and especi- 
ally the front, very swollen; frontal bristles weak but 
numerous . 
Eyes hairy . 
Eyes bare 
Metallic-green species . . ~ oe ee 
Grey or black, seldom fulvous or partly fulvous, species . 
Third joint of the antenne at the most twice as long as the 
second . a 
Third joint of the antennze more than twice as long as the 
second . . 
Lateral ridges of the ace without bristles . 
Lateral ridges of the face with a row of bristles . 
Antenne very short; macrochetze weak Loe 
Antenne almost as long as the face; macrochete rather 
strong . . 
Lateral ridges of the face bare kee 
Lateral ridges of the face with a row of bristles . 
Vibrissz at some distance above the oral margin . 
Vibrissz quite at the oral margin . 
Second joint of the antennz rather elongated, the third joint 
at the most double as long as the second; some veins of the 
wings bristly ; fourth vein slightly prolonged at its point of 
curvature ; apical and posterior cross-veins very oblique 
Second joint of the antennz very short, the third joint more 
than double as long as the second ; veins not bristly ; fourth 
vein not prolonged at its point of curvature; cross-veins not 
more oblique than usual . 
11. 
Micropalpus, Macq. 
10. 
Trichophora, Macq. 
Gymnomma, v. d. Wulp. 
12. 
138. 
Nemocheata, v. d. Wulp. 
Gonia, Meig. 
14. 
17. 
Gymnocheta, Rob.-Desv. 
15. 
Nemorea, Rob.-Desv. 
16. 
Ezxorista, Meig. 
Phorocera, Meig. 
Miltoyramma, Meig. 
18. 
19. 
21. 
. Brachycoma, Rond. 
20. 
Plagia, Meig. 
Masicera, Macq. 
