DIPTERA. 
427 
II. One longitudinal vein between fifth vein and posterior margin ; (palpi 
long) 8. Ptychopterina. 
The Limnohina include the following genera : — 
I. Proboscis longer than head and thorax 2. Geranomyia (Hal.). 
II. Proboscis not longer than head. 
A. Antenno3 pectinate or siibpectinate 3. Rhipidia (Meig.). 
B. Antennae of ordinary structure. 
1. A cross vein uniting longitudinal veins 6 and 7. 
6. TrochohoW (O.-S.). 
2. No cross vein between longitudinal veins G and 7. 
a. Forceps of d of two fleshy lobes ; auxiliary vein terminating before 
or close to origin of second vein .... 1. Bicranomyia (Steph.) 
b. Forceps of ^ of two homy hooks; auxiliary vein usually ter- 
minating far beyond origin of second vein. 
4. Limnohia (Meig.). 
The Limnobina anomala include : — 
I. Rostrum at least as long as head. 
A. Wings without submarginal cell 8. Toxorrhina (Loew). 
B. Wings with a submarginal cell. 
1. Rostrum not much longer than head . . 6 . Rhamphidia (Meig.). 
2. Rostrum not much shorter than whole body. 
7. FAepliantomyia (O.-S.). 
II. Rostrum shorter than head. 
A. Discal cell open. 
1. Second basal cell much shorter than first. 
a. Discal cell coalescent with second posterior cell. 
10. Orimaryaj g. n. 
b. Discal cell coalescent with third posterior cell. 
16. Thaumastoptera (Mik). 
2. Second basal cell about equal to first . . 11. EUiptera (Schin.).j 
B. Discal cell closed. 
1. No marginal cross vein 13. Atarha, g. n. 
2. Marginal cross vein present (sometimes faintly marked). 
a. Longitudinal vein 1 ending in costa nearly opposite base of submar- 
ginal cell. 
* Submarginal cell but little longer than first posterior. 
14. Teucholahis (O.-S.). 
t Submarginal cell much longer than first posterior. 
12. Antocha (O.-S.). 
b. Longitudinal vein 1 ending in costa far beyond base of submar- 
ginal cell 9. Ricranoptycha (O.-S.). 
To the Ej'iopterina the author refers : — 
I. No wings 19. Chionea (Dalm.), 
II. Wings present. 
A. Five posterior cells 26. Cladura {0.-^.). 
^ —Biscohola (O.-S., 1805) ; name preoccupied. 
