ASHMEAD : CLASSIFICATION OP THE CHALCID FLIES 275 



Head and thorax finely rugulose ; marginal vein not longer than the stigmal, the latter straight bnt ob- 

 lique, not curved, postmarginal vein longer than the stigmal ; antennae 13-jointed with two ring- 

 joints AUoderma Ashmead. 



20. Antennae 12-jointed Gastrancistrus "VVestwood. 



Antennae 13-jointed Oxyglypta Forster. 



21. Front wings normal 22 



Front wings abnormal, the portion comprising the costal cell dilated and obliquely truncate at the 



juncture of the submarginal vein with the marginal ; antennae 13-jointed. .. .Epicopterus Westwood. 



22. Antennae 13-jointed, with two or three ring-joints 26 



Antennae 11- or 12-jointed 23 



23. Thorax at most sparsely punctate or nearly smooth 24 



Thorax slightly rugulosely punctate ; antennae 12-jointed Syntasis Walker. 



24. Wings with marginal ciliae 25 



Wings without marginal ciliae. 



Antennae 12-jointed with one ring-joint Cecedoxenus Ashmead. 



Antennae 11- or 12-jointed with two riug-joints. 



Antennae 11-jointed, with two ring-joints Syntomocera Foi-ster. 



Antennae 12-jointed, with two riug-joints Asematus Forster. 



25. Antennae 13-jointed Semiotellus Westwood. 



26. Antennae with two ring-joints 27 



Antennae with three ring-joints .ffipocerus Mayr. 



27. Metathorax short, with a median carina Terobia Forster. 



TiiiBE II. Metastenini. 

 The species falliDg in this tribe are easily separated from those in the tribe 

 Tridymini by mesonotal characters, the parapsidal furrows being incomplete. 



TABLE OF GENERA. 



1. Females 2 



Males 11 



2. Antennae 12-jointed, with two ring-joints 3 



Antennae 13-jointed, with two ring-joints 4 



3. Flagellum incrassated ; mandibles 3-dentate, the malar space not large ; metanotum short, smooth, with 



a distinct median carina, the spiracles small ; marginal vein longer than the stigmal vein, the post- 

 marginal very long Metastenus Walker (type M. concinus Walk.). 



Flagellum at the most subclavate, the club 3-jointed ; mandibles (?) 4-dentate, the malar space large ; 

 axillae widely separated ; metanotum punctate, with a median carina ; marginal vein thickened, as 

 long as the stigmal vein, the postmarginal longer Disema Forster (type D. pallipes Forster). 



4. Tip of antennae normal, not ending in a spiue 5 



Tip of antennae ending in a spine, as in Rhaphiteles Walk., the flagellum long and slender, the funicle 



joints all long ; left mandible 3-, the right 4-dentate ; metathorax not short, without a median 

 carina, the spiracles large, oval ; abdomen large, depressed, very much longer than the head and 

 thorax united Stylophorella Ashmead, g. no v. (type S. perplexa Ashm.). 



5. Pronotum not distinctly separated 6 



Pronotum distinctly separated 8 



