Vol. 1.] Jones. — Catalogue of the Ephydridae. 171 



6. Third joint of anteanse lenticular Discocerina Macquart 



Third joint of aiitennse not noticeably lenticular 7 



7. Upper side of intermediate tibiju with a few long bristles 8 



Upper side of intermediate tibiae without long bristles 1) 



8. Wings with a costal spine, posterior transverse vein perpendic- 



ular, legs not prolonged, clypeus prominent. .Paralimna Low 



Wings without costal spine, posterior transverse vein oblique, 



legs prolonged, clypeus hardly showing. .Corythophora Low 



0. Antennal arista naked Gymnopa Fallen 



Antennal arista udt naked K) 



10. Abdomen sharply edged, first and fifth segments greatly short- 



ened in both sexes Trimerina Macquart 



Abdomen not sharply edged, fifth segment not noticeably short- 

 ened, or shortened only in the males 11 



11. Upper part of face flat, not carinate Psilopa Fallen 



Upper part of face more or less carinate 12 



12. First and fifth alidominal segments shortened in the males.... 18 

 All abdominal segments distinct in both sexes 14 



13. Prajscutellar bristle wanting, only one sternopleural bristle.... 



Hecamede Haliday 



Two prjpscutellar bristles, two sternopleural bristles 



Allotrichoma Becker 



14. Clypeus prominent beneath the oral margin. . .Athyroglossa Low 



Clypeus hidden or projecting but little beyond the oral margin. . lo 



15. Epistoma arched, with only one lateral bristle 



Ephygrobia Schiner 



Epistoma either slightly conca\e or kieled above, more than one 



lateral bristle 16 



16. Thorax with one supraalar bristle Clasiopa Stenhammar 



Thorax with three supraalar bristles Paratissa Coquillett 



17 . Wings normal 18 



Wings small or rudimentary 24 



18. Hind femora thickened and first joint of tarsi very long 



Amalopteryx Eaton 



Hind femora not ureatly thickened and first joint of tarsi normal 19 



19. .Vbdomen decidedly arched, pointed, first longitudinal vein long, 



arched at extremity Cnestrum Becker 



Abdomen not decidedly arched or pointed, first longitudinal vein 



normal 20 



20. Eyes haired, costal vein with two bristles at junction of first 



longitudinal Atissa Haliday 



Eyes naked, costa without .spines 21 



21. Epistoma with a nose-like ridge above Ilythea Haliday 



Epistoma arched above, or without nose-like protuberance 22 



22. Epistoma decidedly arched Ph Hotel ma Becker 



Epistoma not decidedly arched 23 



23. One small fronto-orbital bristle on each side, tibiae without 



bristles, oral opening small Beckeriella Williston 



Two fronto-orbitals on each side, all of the tibiae with a row 

 of bristle-like hairs on the outer side, oral opening of 

 moderate size Gastrops Williston 



24. Wings short, scaly, halteres small Apetaenus Eaton 



Wings rudimentary, clothed with hairs, halteres of usual size. . . . 



Chamaebosca Speiser 



