296 MEMOIRS OF THE CARNEGIE MUSEUM 



2G. Marginal vein rather long, the stigmal and postmarginal veins short. 



Wings with fuscous rays; lataral ocelli nearer to the eye margin than to the front ocellus; 



axilla; meeting at base of scutellum Calocerinus Howard. 



Wings hyaline ; lateral ocelli not nearer to the eye margin tluin to the front ocellus ; axilhe not 



quite meeting at base of the scutellum Tetralophidea Ashmeail. 



27. Winged forms 28 



Wingless or subapterous forms :!G 



28. Front wings with the marginal vein linear, longer than the stigmal, the postmarginal vein rather short, 



hardly so long as the stigmal or clearly shorter, the stigmal vein bent so as to be nearly parallel 



with it 28 



Front wings with the marginal vein usually shorter, the stigmal and postmarginal veins short, or the 

 stigmal vein is longer than the marginal and postmarginal veins united, or if with the marginal vein 

 long or somewhat long, the stigmal and postmarginal veins are not short, the stigmal vein not bent 

 so as to be nearly parallel with the marginal 29 



28. Frons and scutellum finely coriaceous, the thorax metallic or submetallic, with silvery hairs ; llagellum 



filiform, the joints subequal, at least three times as long as thick, witli long, .si)arse hairs. 



Chrysopophagus Ashmead. 



29. Marginal vein long or somewhat long, the stigmal and postmarginal veins not short 30 



Marginal vein usually shorter, the stigmal and postmarginal veins short, or the stigmal vein longer 



than the short marginal and postmarginal veins united 34 



30. Frons minutely shagreened, with some minute punctures scattered over the surface 31 



Frons broad, smooth, margaritaceously shining, impunctate 33 



31. Autennaj 11-joiuted, with a 6-jointed funicle 32 



Antennsu 9-jointed, with a 4-jointed funicle Meromyzobia Ashmead. 



32. Antenuai not longer than the body, the joints of the llagellum closely united and clothed with a short, 



dense pubescence Ericydnus Walker. 



Antennse much longer than the body, the joints of the Uagelhuu subpedunculate and each joint fur- 

 nished with two whorls of long hairs Leptomastix Fiirster. 



33. Antenna3 long, filiform, 9-jointed, feebly compressed Ectroma We.stwood. 



34. Marginal vein slender, not stout 35 



Marginal vein rather short and stout, the stigmal and postmarginal veins very shoit. 



Scape usually broadly dilated below, the flagellum slender, cylindrical Anagyrus Howard. 



35. Stigmal vein long ; scape long, dilated and compressed beneath, the flagellum filiform, clothed with a 



short dense pile ; scutellum triangular, acute at apex ; body shagreened Dinocarsis P^orster. 



Stigmal vein short ; scape broadly compressedly dilated beneath, the flagellum compressed, fusiform, 

 broadest towards the middle and gradually tapering off towards apex Anusia Forster. 



36. Scutellum lunate 38 



Scutellum triangular or subtriangular, never lunate. 



Frons smooth, shining, somewhat iridescent 37 



Frons shagreened or feeljly jjunetate. 



Scape and llagellum uornial, the latter clothed with a short, dense pile. 



Ericydnus Walker. 



37. Scutellum bifoveatc at base ; scape and flagellum not at all compressed, cylindrical. 



Ectroma West wood. 

 Scutellum not foveate at base ; scape broadly dilated beneath, the flagellum compressed, fusiform. 



Anusia Forster. 



