DIPTERA 
broad front {P\ . 5, Fig. 25). Compare also 
Palaeophthinia, No. 3o 
jj. The lateral ocelli close to the eye margin; sub- 
costal vein shorty only rarely reaching the casta 
(PI- 6, Fig. II) 
ff. Subcostal vein if long then ending either in Rj or with 
its end free, usually short. 
g. Costal vein extends beyond tip of Rs (if but slightly 
then the subcostal vein is long and ends in R ,). 
h. Antennae twelve jointed ; venation Sciara-/«'A«, i. e. 
the R-M crossvein is placed longitudinally and 
appearing like the basal section of a longitudinal 
vein, the base of the radial sector placed transver- 
sely [see PI. 6, Fig. 28 o/ Sciara wing) but 
the cubitus is distinctly petiolate ; two ocelli 
hh. Venation not Sciara-/2^« when antennae are twelve 
jointed. 
i. Lateral ocelli in the recent forms distinctly separated 
from the eye margin ; for fossil forms consult both 
this and section ii. 
j . Subcostal vein at least half as long as the basal 
cell R, ends free or in R j . 
k. Cubitus apparently without petiole; fossil 
(PI. 5, Fig. 27) 
kk. Cubitus petiolate {P\. 5, Fig, 28, 29). . 
jj. Subcostal vein less than half as long as the basal 
cell R. 
k. Base of the fork of the cubitus proximad of that 
of the media. 
I. Base of the fork of the cubitus proximad of the 
proximal end of the R-M crossvein . 
m. Anal vein extending beyond base of fork of 
the cubitus {P\. 5, F\g. 26) . . . 
mm. Anal vein very short [P\. 5, Fig. 30) . 
II. Base of the fork of the cubitus distad of the 
proximal end of the R-M crossvein (PI. 6 j 
Fig. 1,2,3) 
- kk. Base of the fork of the cubitus distad of that 
of the media {P\. 6, Fig. I 2) . . . 
ii. Lateral ocelli in the recent forms nearly or quite 
contiguous to the eye margin. 
j. Subcostal vein less than one-fourth the length of 
the basal cell R and ending in R ^ . 
k. Three ocelli; costa produced far beyond the tip 
of the radial sector {P\. 6, Fig. 4) . . 
38. Genus Ccelosia, Winnertz. 
5i. Genus Phronia, part., Winnertz. 
39. Genus Pseudosciara, Schiner. 
40. Genus Meunieria, nom. nov. 
41. Genus Syntemna, Winnertz. 
42. Genus Rutrophora, Schnuse. 
43. Genus Megophthalmidia, Dziedzicki. 
44. Genus Parastemma (= Sciarella? 
[= Heeriella?), Grzegorzek. 
52. Genus Macrobrachius, Dziedzicki. 
45. Genus Anatella, Winnertz. 
