16 ANNALS OF SCOTTISH NATURAL HISTORY 



between the Lonc/iopteridcz and the Platyptezida. The order 

 in which the genera appears in this paper is not intended to 

 indicate their rotation in the list. 



TABLE OF GENERA. 



1. (2.) Thick, flattened species, frons, legs, and costa without 



bristles, third vein unforked ( = second vein absent). 



Platyphora, Verr. 



2. (i.) Body of the usual arched shape. 



3. (4.) Footpads and empodium absent, fourth thin vein absent, 



four pairs of fronto-orbital bristles, very minute species. 



Metopina, Mcq. 



4. (3.) Footpads and empodium present. 



5. (6.) Frons without bristles, vertical row present, costa fine 



haired. Gymnophora, Mcq. 



6. (5.) Frons with bristles, costal bristles present. 



7. (8.) Post-antennal and lower frontal bristles absent, three pairs 



of fronto-orbital bristles, and one pair of upper frontal 

 bristles present ; second vein absent, mid-tibiae with 

 row of outer bristles, eyes bare. Trineura, Mg. 



8. (7.) Post-antennal bristles present, not more than two pairs of 



fronto-orbital bristles, eyes hairy. 



9. (10.) Arista apical ; antennae with third joint slightly pointed in 



$, long and pear-shaped in 6", only the vertical and 

 upper frontal horizontal rows in addition to the post- 

 antennal bristles present, second vein absent. 



Conicera, Mg. 



10. (9.) Arista dorsal, head bristles in three horizontal rows of four 



each, post-antennal bristles present. 



11. (24.) Post-antennal bristles reclinate. 



12. (22.) Mid tibia with two strong bristles at base. 



13. (23.) Second vein present (third vein forked). 



14. (15.) Fourth thin vein abbreviated or indistinct, tibial armature 



weak. Trupheoneura, Mall. 



15. (14.) Fourth thin vein generally distinct and always reaching 



the margin of the wing, or else all thin veins abbreviated 

 (Phora abbreviata). 



1 6. (17.) Third thick vein with short bristles. Chtztoneura, Mall. 



17. (16.) Third thick vein bare. 



1 8. (21.) Scutellum with four bristles. 



