DIPTERA 
distad and usually tinder or proximad of 
the R-M crossvein. 
I. Subcostal vein enters the costa beyond, at 
or little be/ore the base of the radial 
sector. 
m. Fore metatarsus distinctly longer than its 
tibia; petiole of the media about half as 
long as the anterior branch; costa scarce- 
ly produced beyond tip of radial sector 
(PI. 5, Fig. 5, 6) 
mm. Fore metatarsus shorter than its tibia. 
n. Subcostal vein prolonged far beyond the 
base of the radial sector ; anal vein 
stout; petiole of the media about half as 
long as the anterior branch (PI. 5, 
Fig. 7) 
nn. Subcostal vein not produced far beyond 
the base of the radial sector, the petiole 
of the media less than half as long as 
its anterior branch {P\, 5, Fig. 8). 
Compare here also Euryceras Mar- 
shall (PI. 5, Fig. 9) and Pa]seo- 
holetina Meunier (PI. 5, Fig. I 0) 
which are probably not distinct . 
II. The distance between the tip of the subcostal 
vein and the base of the radial sector at 
least equal to one-fourth the breadth of the 
wing at the widest part. 
m. Petiole of the media measured from the 
crossvein not more than one-fourth as 
long as the anterior branch . 
n. Costa produced far beyond the tip of radial 
sector; base of fork of the cubitus distad 
of base of the R-M crossvein (PI. 5, 
Fig. II) 
nn. Costa produced little or not at all beyond 
the tip of radial sector; base of radial 
sector situated beyond the middle of 
the wing; base of fork of the cubitus 
proximad of the base of the R-M 
crossvein; tibial setae stout (PI. 5, 
Fig. 12). . 
mm. Petiole of the media measured from the 
crossvein about half as long as its 
anterior branch, costa produced beyond 
end of the radial sector. 
22. Genus Leptomorphus, Curtis. 
23. Genus Allocotocera, Mik. 
24. Genus Boletina, Staeger. 
25. Genus Proneoglaphyroptera, 
[Meunier. 
26. Genus Leia {= Neoglaphyroptera), 
[Meigen. 
