ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 321 



30. Occipital foraminal depression distinctly margined or rimmed 31 



Occipital foraminal depression simple, immargined 37 



31. Metathorax at apex produced into a subglobose neck, the median carina and the lateral folds usually 



present. 



Antennae with two ring-joints 32 



Antennae with three ring-joints Belonura Ashmead. 



32. Eyes hairy 33 



Eyes bare, not hairy 36 



33. Postmarginal vein longer than the stigmal 34 



Postmarginal vein not longer than the stigmal, usually a little shorter 35 



34. Second abdominal segment very large Isocyrtus Walker. 



Second abdominal segment normal ; flagellum subclavate, pubescent, the joints transverse or quadrate. 



Urolepis Walker. 



35. Flagellum subclavate or clavate, clothed with a short pubescence, the joints usually much wider than 



long ; tibiae with rigid bristles ; abdomen rotund, the second segment not especially large. 



Trichoglenes Thomson. 



36. Antennae filiform, pubescent ; funicle joints 4 to 6 usually a little wider than long or not longer than 



wide Trichomalus Thomson. 



37. Metathorax at apex usually produced into a subglobose neck ; postmarginal vein always longer than 



the stigmal 38 



Metathorax at apex normal ; postmarginal vein rarely longer than the stigmal, most frequently shorter 

 or of an equal length 46 



38. Legs normal, the middle tibiae not dilated 39 



Legs abnormal, the middle tibiae dilated toward tips ; antennae with the joints alternately white and 



brown Polyscelis Thomson. 



39. Pedicel long, always longer than the first joint of the funicle 40 



Pedicel short, never longer than the first joint of the funicle, usually much shorter, the first joint of the 



funicle the longest of the funicle joints 41 



40. Metathoracic spiracles small, elliptic ; abdomen short oval, depressed ; flagellum filiform, pilose, the 



joints cup-shaped, transverse Endomychobius Ashmead. 



Metathoracic spiracles oval ; abdomen boat-shaped ; flagellum subfiliform or subclavate, pubes- 

 cent, the club always longer and stouter than the pedicel Meraporus Walker. 



41. Antennae with two ring-joints 42 



Antennae with three ring-joints? 



42. Metathoracic spiracles small, rounded 43 



Metathoracic spiracles not small, rounded 44 



43. Antennae subclavate, pubescent ; abdomen oblong-oval, flat, beneath at the most convex. 



Scymnophagus Ashmead. 



44. Metathoi-acic spiracles long oval or oblong, more rarely subreniform or linear 45 



Metathoracic spiracles smaller, oval or broadly oval. 



Metanotum very short, smooth, impunctate with a median carina Epipteromalus Ashmead. 



45. Metathoracic spiracles long-oval or oblong. 



Abdomen oblong-oval, dorsal segments 3-5 unequal, gradually increasing in length, united a little 

 longer than the second ; flagellum filiform, pubescent, the joints of the funicle about twice as 

 long as thick or longer Pteromalus Swederus. 



