FAMILY LAUXAXIID.E 319 



9. Third vein setulose below to beyond the anterior crossvein (27). 



Neominettia Hendel 

 Third vein setulose above and below before the anterior crossvein 

 (3, 31 ) Chjetominettia Malloch 



10. Second vein setulose before the origin of the third vein (30, 34). 



*Xenochjetina Mallocli 

 Second vein bare 11 



11. First vein setulose posteriorly before the humeral crossvein (28, 36). 



Setulina Malloch 

 First vein bare 12 



12. Wings with a crossvein dividing the apical .cell beyond the posterior 



crossvein (11) Xenopterella Malloch 



Wings with only the usual crossveins 13 



13. Antei'ior frontal bristle directed inward; first antennal segment as long 



as the second 14 



Anterior frontals reclinate; first antennal segment short 17 



14. Ocellar bristles minute 15 



Ocellars long and strong 16 



15. Face concave in profile Freyia Malloch 



Face convex (2, 16) Physegenua Macquait 



16. Face strongly convex; anterior frontals half way between the antennae 



and upper frontals (12) Pachycerina Macquart 



Face gently convex or plane; anterior frontals closer to upper frontals 

 than to antennae (7, 20) Camptoprosopella Hendel 



17. First antennal segment as long as the second (25) Freyia Malloch 



First antennal segment short 18 



18. Presutural bristle present 19 



Presutural bristle absent; face strongly retreating (19, 33). 



fTrigonometopus Macquart 



19. Apical cell very strongly narrowed apically, almost closed (13, 24). 



Griphoneura Schiner 

 Apical cell widely open 20 



20. Sternopleura with one bristle 21 



Sternopleura with two bristles, the anterior one w^eaker 22 



21. Front much broader than long, concave in front from dorsal view (6, 



35 ) Neogriphoneura Malloch 



Front rarely broader than long, not concave in front (5, 38). 



X Pseudogriphoneura Hendel 



22. Face convex and glossy (29, 37) Pseudocalliope Malloch 



Face gently convex or flat, not polished 23 



* Malloch. 1923. Pioc. Ent. Soc. Wash., xxv, p. 49. 

 t Malloch, 1923, Proc. Ent. Soc. Wash., xxv. p. 48. 

 t Curran, 1934, Bull. Amer. Mus. Nat. Hist., Ixvi. p. 445. 



