Aphiochaeta. 215 



— Third antennal joint not oval; no chitinized ovi- 



positor 27 . 



27. Second abdominal segment with a number of long 



bristles at the sides 28. 



— Second abdominal segment witliout long bristles 



at the sides 32. 



28. Third vein very dilated in the male and also 

 rather thickened in the female; antennæ yellow 

 with a brownish apical spot, which is small in 



male, large in female 12. humeralis Zett. 



— Third vein simple 29. 



29. No distinct intraalar bristle present; arista not 

 longer than the frons; frons about quadratic ' 



(only female known) 13. ruhricornis Schmitz. 



— A distinct intraalar bristle present inwards to the 

 posthumeral bristle; arista longer; frons broader 



than high 30. 



30. Legs dark brown; hind femora broad to near 



apex 14. latijemorata Beck. 



— Legs yellowish ; hind femora less broad, the dorsal 



margin cm'ving evenly down towards apex 31. 



31. 1 generally shorter or at most slightly longer 

 than 2 ; f our scutellar bristles in both sexes ; ab- 

 dominal tergites in female after the second more 



or less constricted 15. ruficornis Meig. 



— 1 longer than 2; male with only two scutellar 

 bristles; abdominal tergites in female not or 



slightly constricted 16. errata Wood. 



32. Thorax red or brown 33. 



— Thorax black 36. 



33. Antennæ brownish black to red or reddish yellow, 



small or of normal size, arista of usual length 34. 



— Antennæ yellowish red, above usual size, arista 



short 17. ruhida Schmitz. 



34. Supraantennal and scutellar bristles unequal; 



abdomen black 18. quadriseta Schmitz. 



— Supraantennal and scutellar bristles equal; ab- 

 domen with yellow hind margins to the segments, 



* or otherwise marked with yellow 35. 



35. Fourth vein somewhat S-like curved; hairs below 



hind femora not long pseudogiraudii Schmitz. 



— Fourth vein not S-like curved; hairs below hind 



femora long and somewhat strong 19. joseudopicta n. sp. 



36. Halteres dark yellow or light brownish ; antennæ 



of male very large 20. emarginata Wood. 



— Halteres yellow; antennæ of male small or 



medium sized 37 . 



37. Abdomen black, only very slightly greyish; 



scutellar bristles equal or nearly so 38. 



