378 
11. 
12, 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
DIPTERA. 
Femora, especially the hind pair, incrassated ; cross-veins approxi- 
mated re 
Femora not incrassated ; cross-veins distant - oe ee 
Mediastinal cell elongate, terminating in the middle of the costa . 
Mediastinal cell very narrow, terminating nearer to the base of 
the wing . . . to . oe 
Small cross-vein on the middle or beyond the middle of the 
discalcell . . 2... . soe 
Small cross-vein distinctly before the middle of the discal cell . 
Mediastinal cell narrow and short, terminating in the costa long 
before the middle. . . . . - 
Mediastinal cell of the usual shape, terminating on the middle of 
the costa, above the small cross-vein ; wings broad, blackish, 
with many white dots 
Third basal cell inferiorly pointed, but not prolonged beyond the 
end of the second hasal cell . 
Third basal cell inferiorly drawn out into a long, pointed lobe . 
Second vein straight 
Second vein sinuous tons Soe ees 
Front and face more or less prominent ; third antennal joint 
elliptical, rounded at the tip soe 
third antennal joint concave on 
the upperside, pointed at the tip . . . rn 
First vein terminating at the basal third of the costa, which is 
deeply incised; discal cell shorter than the second posterior 
cell 
Front and face not prominent ; 
First vein terminating beyond the middle of the costa, which is 
straight ; discal cell much longer than the first posterior cell 
Wings elongate, their anterior and posterior margins nearly 
parallel ; second vein, and often the fourth also, sinuous . 
Wings of the usual shape ; second and fourth veins straight, the 
fourth sometimes slightly curved; first posterior cell more or 
less attenuated towards the tip of the wing 
PYRGOTA. 
Pyrgota, Wiedemann, Aussereur. zweifl. Ins. ii. p. 580 (1830). 
1. Pyrgota lugens, sp. n., 3. 
wings brownish-black. 
Length 14 millim. 
In its general shape agreeing with P. undata, Wied., but with the whole body, and also the head, unicolorous 
deep black. First and second antennal joints black, the third joint reddish-brown ; 
black at the base, which shows a distinct, but very short, basal joint. 
proboscis thick; the palpi with short black bristles. 
the scutellum these hairs are longer and erect. 
Richardia, Rob.-Desv. 
12. 
Paneryma, v. d. Wulp. 
13. 
Cyrtometopa, Low. 
Stenomacra, Low. 
Automola, Low. 
Amp hicnephes, Low. 
16. 
19. 
17. 
18. 
Tetanops, Fall. 
Anacampta, Low. 
Ostracocelia, Gigl.-Tos. 
Xanthacrona, v. d. Wulp. 
Pterocalla, Rond. 
Eueesta, Low. 
(Tab. X. figg. 1; la, head in profile.) 
Black ; third antennal joint brown; legs piceous ; 
arista pale rufous, 
Proboscis and palpi black; the 
Thorax and abdomen with short black hairs ; 
Legs piceous, with short black hairs, but without 
on 
