ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 251 



7. Metathorax without lateral teeth or projections 8 



Metathorax with lateral teeth or projections 10 



8. Abdomen produced, the eighth segment in female greatly lengthened into a long compressed stylus ; 



antennae 13-jointed Eustypiura Ashmead, gen. nov. (type E. hicolor Ashm.). 



Abdomen conic-ovate or fusiform, the eighth segment in female normal or nearly, not produced into a 

 stylus ; antennse 13-jointed. 



Petiole of abdomen very long and slender, as long as the thorax or nearly, or at least twice as 



long as the metathorax 9 



Petiole of abdomen usually short and stout, never very long or slender ; scape of antennjB nor- 

 mal, not extending beyond the ocelli Spiloclialcis Thomson (type Chalc.is xanthostigma Dalm.). 



9. Scape of antennae abnormal, very long and usually clavate, extending far above the ocelli, its apex 



beneath sometimes excavated and enclosing the base of the flagellum ; abdominal petiole slender 



and of a uniform thickness throughout Ceratosmicra Ashm., gen. nov. (type C. peiiolata Ashm.). 



Scape of antennae slender, cylindrical, not or scarcely reaching beyond the ocelli ; abdominal j^etiole 



thickest at the middle, tapering off towards each end Sayiella Ashmead, gen. nov. 



(type Smicra debilis Say.). 



10. Scutellum normal, unarmed 11 



Scutellum at apex bideutate or with an emarginate plate or ridge. 



Metathorax quadridentate (two teeth on each side of the petiole) ; body of abdomen short ovate, 

 the petiole shorter than the thorax ; antennae 13-jointed, the flagellum filiform, clothed with 

 a dense, short pubescence, the scape shoi't, subcompressed.Xanthomelanus Ashmead, gen. nov. 



(type C'halcis dimidiata Fabr.). 



11. Metathorax bidentate (one tooth on each side of the petiole) ; thorax never wholly black; antennae 



13-jointed 12 



Metathorax quadridentate (two teeth on each side of the petiole) ; thorax sometimes wholly black ; 

 scape of antennae long, extending beyond the ocelli. 



Thorax wholly black ; body of abdomen ovate, the petiole variable in length, usually long and 



slender, but shorter than the thorax ; antennae 13-jointed, the flagellum filiform, the scape at 



tip beneath not excavated. . . Melanosmicra Ashmead, gen. nov. (type M. immaculata Ashm,). 



Thorax yellow or yellow marked with black ; body of abdomen usually conical, the petiole 



long ; antennte 13-jointed, the scape at apex beneath excavated. 



Ceratosmicra Ashmead (partim). 



12. Scape of antennae normal ; body of abdomen in female fusiformly pointed or conic-ovate, the petiole very 



short, not or rarely longer than thick Spilochalcis Thomson (partim). 



Scape of antennae usually long and extending much beyond the ocelli ; body of abdomen ovate, the 

 petiole very long and slender, as long or nearly as the thorax. . . . Mischosmicra Ashmead, gen. nov. 



(type M. Kahlii Ashm.). 



13. Metathorax normal or with one small tooth on each side of the petiole ; abdomen variable, subglobose, 



conic-ovate or fusiform, but rarely ending in a stylus ; antennae 13-jointed. 



Spilochalcis Thomson (partim). 



14. Antennae 13- or 14-jointed 15 



Antennae 12-jointed. 



Metathorax posteriorly quadridentate Thaumapus Kirby (type Smicra decora Walk.). 



15. Antennae 13-jointed 16 



Antennae 14-jointed ; hind coxae usually with a leaf-like expansion at apex, their femora armed with 



large or moderate sized teeth Epinseus Kirby (type Smicra dux Walker). 



