Aphiochaeta. 217 



2. Halteres black or brown 3. 



— Halteres yellow 9. 



3. Bristles on hind tibiæ more or less delicate 4. 



— Bristles on hind tibiæ strong 8. 



4. Inner bristle of lower frontal row below the 



outer 5. 



— Inner bristle of lower frontal row in or nearly 



in the same height as the outer 7. 



5. Frons broader than long (aboiit V-/s — 1 ) ; supra- 

 antennal bristles equal or nearly so, the upper 

 more distant than the inner bristles of the 

 middle row; antennæ in male large; bristles 



on palpi long 6. 



— Frons less broad; supraantennal bristles un- 

 equal, the upper less distant; antennæ in male 



not large; bristles on palpi more or less short . . 25. Umburgensis Schmitz^ 



6. Legs more or less yellow; 1 about double 2 and 



2 considerably longer than 3 23. rudis Wood. 



— Legs mainly blackish ; 1 more than double 2 and 



2 slightly longer than 3 (only male known) indigesta Schmitz. 



7. Hind femora with long hairs below the basal 



half pseudociliata Strobl. 



— Hind femora with only short hairs below ... 24. defilata Lundbk. 



8. Front legs, especially coxæ, yellow ; f emale with 



fourth abdominal tergite abbreviated 26. ciliata Zett. 



— Front legs dark; f emale with fourth abdominal 



tergite not abbreviated major Wood. 



9. Costa not reaching the middle 10. 



— Costa reaching to or beyond the middle IL 



10. 1 about equal to or very sUghtly longer than 

 2 + 3 ; posterior legs dark to black ; f emale 



with fourth abdominal tergite not abbreviated . . 27. aequalis Wood. 



— 1 distinctly longer than 2 + 3 ; posterior legs 

 yellowish brown ; f emale with fourth abdominal 



tergite abbreviated 28. coaequalis Schmitz. 



11. Antennæ yellowish red; large bristle on meso- 

 pleura long and strong; costa reaching beyond 



the middle 29. flavescens Wood. 



— Antennæ black or blackish brown ; large bristle 

 on mesopleura much smaller ; costa only reach- 

 ing to the middle 25. Umburgensis Schmitz._ 



12. Halteres black 30. fungivora Wood. 



— Halteres yellow or dusky yellow 13. 



13. Costa reaching to or beyond the middle. ... 31. pleuralis Wood, 



— Costa not reaching to the middle 14. 



14. Wings brownish tinged 32. stichata Lundbk. 



— Wings colourless or nearly 15. 



