98 [May, 



(3) Head in profile almost entirely composed of the compound eye. The 

 rounded front of frons and narrow jowls just visible, the very 

 narrow facial orbits almost quite hidden. Eyes in male practically 

 touching on frons, and the frontal bristles absent for the whole 

 distance where the eyes are so approximated. 



.... Gymnodia Dsv. Species 18. 

 . . . .Brojitaea Kow. 



7 (2) Prosternuni hairj' at sides. Frons wide in both sexes, with extremely 



wide orbits. Inter-frontalia of female very long and wide. 

 Froutalia in both sexes, if present, very narrow or only linear. 



. . . .ISieolimnophora Schnbl. Species 19, 20. 



8 (1) Cubital vein with minute bristles at least on nodose junction with 



radial vein, and proaternum also with minute bristles or hairs on 

 each side margin. 



9 (12) Frons in protile more convex and sloping, the angle made with the 



face greater than a right angle. 



10 (11) CV^osm-lilie species with frons equally wide and with distinct vertical 



bristles in both sexes. . . Fsevclolimnojyhora Strobl. Species 21, 22. 

 .... Stroblia Pok. 



11 (10) Frons in the male much narrower than in the female, and without 



distinct vertical bristles. Limnophora Dsv. Species 23-27. 

 .... Melanochelia llond. 

 .... LimnopJiorites S. & D. 



12 (9) Frons in profile flat and almost horizontal, the angle made with the 



face practically a right angle ; base of antennae nearly level with 

 upper margin of eyes ; face and antennae long. 



.... Calliojjhrys Kow. Species 28, 29. 



The subdivisions are undoubtedly natural groujis, and at least the 

 first four will, in all probability, some day be granted full generic rank. 

 The better course for the present, however, would appear to be to treat 

 them as subgenera ; this, by calling attention to their existence, will 

 give them a chance of being tested in application to a more extended 

 fauna than that upon which they have been founded. 



The first four subgenera, which constitute Division I as indicated 

 above, are certainly more easily differentiated than those in Division II. 

 They may be more fully characterized as follows : — 



Sjniof/ona. — Face flat, with front mouth-edge only rarely produced, 

 and consequently underside of head unusually short. Eyes of male never 

 so widely separated as in Jllleneuvia. Arista much longer than 3rd 

 antenna! joint. Sexual dichroism usually very marked. Acrostichal 

 bristles hair-like and multiserial, very seldom somewhat stronger and 

 biserial. Three or tour pairs of post-sutural dorso-central bristles. Legs 

 strongly bristled, several bristles on shaft of posterior tibiae and usually 

 a pair of preapical bristles to all tibiae. Discal and cubital veins 

 diverging, or at most jmrallel towards tip of wing. 



