FAMILY OTITID.E THE PICTURED-WIXG FLIES 275 



8. Occiput, from lateral view, strongly convex above the neck (24). 



Sepsisoma Johnson 

 Occiput flat or slightly concave above the neck (1, 21). 



Macrostenomyia Hendel 



9. Anterior crossvein situated farther from the posterior crossvein than 



the length of the latter 10 



Crossveins situated closer to each other than the length of the posterior 

 crossvein (100) Hemixantha Lcew 



10. Abdomen with almost parallel sides or coarctate basally 11 



Abdomen tapering to the base 13 



11. Anterior crossvein situated before the middle of the disca! cell (31, 68). 



Setellida Hendel 

 Anterior crossvein situated beyond the middle of the discal cell 12 



12. Anterior femora without spines beneath (78, 96) .Neoidiotypa Osten Sacken 

 All the femora with spines beneath Paneryma Wulp 



13. First antennal segment short 14 



First antennal segment as long as the second (49, 93). . Poecilomyia Hendel 



14. Anterior crossvein situated at or before the middle of the discal cell; 



front concave above from anterior view (10, 73) .Coilometopia Macquart 

 Anterior crossvein situated well beyond the middle of the discal cell.. 15 



15. Two pairs of scutellars IG 



Only one pair of scutellars (63, 76, 98, 107) Melanoloma Lrew 



16. Front much wider than either eye (42, 10.5) Zetekomyia, n. g. 



Front narrower than either eye Melanolomina, n. g. 



17. Antennae widely separated, situated in deep grooves, the face strongly 



convex in profile (50) Ulidia Meigen 



Antennae not situated in deep grooves or the face not strongly convex . . 18 



18. Anal vein absent or not extending beyond the anal cell 19 



Anal vein extending well beyond the anal cell 20 



19. Anal cell absent, the wings very narrow (2.5, 36) Steneretma Lcew 



Anal cell present (22, 45) Eumecosomyia Hendel 



20. Front with large rather deep pits or with strong transverse ridges or 



grooves 21 



Front normal, sometimes with four longitudinal grooves above 22 



21. Auxiliary vein forming a rather acute angle with the costa (19, 37). 



Acrosticta Lcew 

 Auxiliary vein foiTning an obtuse angle with the costa (30, 89). 



Notogramma Lcew 



22. Antennae as long as the head, the third segment four times as long as 



wide (51, 74) Stictomyia Bigot 



Antennae much shorter, the third segment never three times as long- 

 as wide 23 



23. Face convex in the middle in profile 24 



Face concave in profile 25 



