Pipunculus. 19 



Table oj Species. 



1. Stigma present (i. e. third costal segment colom-ed) 



and about as long or longer than next costal segment 2. 



— Stigma absent and third costal segment from half as 



long to one quarter of the next costal segment 26. 



2. Abdomen all dull; femora without pubescence behind, 



even on middle femora 3. 



— Abdomen more or less sliining, at least on the hind 

 margins of the segments; femora with pubescence 

 behind, at least on middle femora (except zermat- 



tensis) 15. 



3. Legs quite black 1. melanostolus. 



— Legs not qnite black 4. 



4. Abdomen velvet black with pale grey hindmarginal 



bands 8. sericeus. 



— Abdomen brown with greyish hindmarginal spots or 



bands 5. 



5. Males 6. 



— Females 10. 



6. Hypopygium with a large impression 7. 



— Hypopygium with a small or smallish impression, 

 roundish, oval or somewhat triangular, sometimes 



nearly or quite disappearing 8. 



7. Larger species, 3,5—4,5 mm 2. zonatus ^. 



— Small species, 2,4—3,3 mm 3. fuscipes ^. 



8. Third antennal joint short-pointed, not rostrate; 



tibiæ mainly dark 4. montium cj. 



— Third antennal joint more or less long-r ostrate ; tibiæ 



mainly yellow 9. 



9. Third antennal joint yellowish; stigma shorter than 

 next costal segment; impression on hypopygium not 



quite small, oval 5. coloratus ^. 



— Third antennal joint dark; stigma as long or fully as 

 long as next costal segment; impression on hypopy- 

 gium quite small, roundish, sometimes nearly or 



quite disappearing 7. terminalis ^. 



10. Hypopygium with a middle furrow 11. 



— Hypopygium without middle furrow 14. 



11. Frons all grey 7. terminalis ?. 



— Frons black above 12. 



12. Third antennal joint yellow; tibiæ and tarsi mainly 



yellow 6. sulcatus $. 



— Third antennal joint dark; tibiæ and tarsi mainly 



black or brownish 13. 



13. Middle cross-vein near the end of the first third of the 



discai cell; size 3,5—4,5 mm 2. zonatus $. 



— Middle cross-vein nearer the middle; size 3— 3,5 mm 4. montium ?. 



2* 



