278 MEMOIES OP THE CARNEGIE MUSEUM 



Tribe II. Miscogasterini. 

 This tribe may be recognized by the complete mesonotal furrows ; otherwise it is 

 practically identical with the previous tribe, with similar habits. 



TABLE OF GENERA. 



1. Females 2 



Males 9 



2. Pronotum not distinctly separated 3 



Prouotum distinctly separated. 



Mesothoracic lobes not convex ; abdomen elongate, subcompressed, the petiole short. 



Toxeuma Walker (type T. ericse Walk.). 



3. Mesothoracic lobes flat or at most subconvex, the furrows not deep, delicately impressed posteriorly. 4 

 Mesothoracic lobes convex, the furrows deep -. 5 



4. Metathorax long, rugose, with a median carina and complete lateral folds ; scutellum with a more or 



less distinct cross-furrow before apex, the lateral margins convergent toward base. 



Megorismus Walker (type M. aon Walk.). 

 Metathorax short, almost smooth, with a distinct median carina ; scutellum with the lateral margins 



nearly straight, not or only slightly convergent toward base Ormocerus Walker 



(type 0. latus Walk.). 



5. Petiole long ; both mandibles 4-dentate 8 



Petiole short or moderate ; mandibles variable. 



Left mandible 3-dentate, the right 4-dentate 6 



Both mandibles alike, either 3- or 4-dentate ' 7 



6. Petiole rugose or smooth ; front wings with the stigmal vein ending in a small knob. 



Lamprotatus Westwood (type L. splendens Westw.). 

 Petiole punctate, subdepressed ; front wings with the stigmal vein ending in a large knob. 



Dorsum serico-punctate Gitognathus Thomson (type Sphseropalpus viridis Forst.). 



Dorsum squamo-punctate Stictomischus Thomson (type S. scaposus Thoms.). 



7. Both mandibles 8-dentate ; stigmal knob small; clypeus transverse, sepai'ated, the anterior mai'gin 



truncate Seladerma Walker (type S. Isetum Walk.). 



Both mandibles 4-dentate ; stigmal knob large Miscogaster Walker (type M. hortensis Walk.). 



8 . Stigmal vein ending in a large knob Miscogaster Walker. 



9. Pronotum not distinctly separated 10 



Pronotum distinctly separated. 



Both mandibles 4-dentate ; flagellum hairy, the first joint not longer than wide ; mesothoracic 

 lobes not convex Toxeuma Walkei-. 



10. Mesothoracic lobes convex, the furrows deep 11 



Mesothoracic lobes flat or at most subconvex, the furrows not deep, delicately impressed posteriorly. 



Metathorax long, rugose, with a median carina and complete lateral folds ; scvitellum with a 

 cross-furrow before apex, the lateral margins convergent toward base. . . .Megorismus Walker. 



Metathorax short, almost smooth, with a distinct median carina ; scutellum with the lateral 

 margins nearly straight Ormocerus Walker. 



11. Petiole long or short ; both mandibles 4-dentate 14 



Petiole short ; both maodibles 3-dentate, or the left is 3-dentate, the right 4-deutate. 



Left mandible 3-, the right 4-dentate 12 



Both mandibles 3-dentate 13 



