332 MEMOIRS OF THE CARNEGIE MUSEUM 



Metathorax long and also produced into a sabglobose neck at apex ; pronotum with the front margin 

 rounded ; both mandibles 4-dentate Bubekia Dalla Torre. 



24. Palpi normal 25 



Palpi abnormal 26 



25. Middle tibise abnormal, incrassated at apex 27 



Middle tibise normal. 



Abdomen with dorsal segments 2 and 3 large Sphegigaster Spinola. 



26. Abdomen with the second segment large, occupying most of the surface, its apical margin not incised. 



Cryptoprymna Fiirster. 



Abdomen with the second segment not so large, its apical margin usually with a slight incision ; 



antennae, except the club, usually yellow, .Polycyrtus Westwood. 



27. Abdomen short, the second segment at apex not incised Spaniopus Walker. 



28. Antennse filiform ? g. nov. 



29. Mesothoracic furrows incomplete or indicated only anteriorly 30 



Mesothoracic furrows complete 33 



30. Metanotum smooth or at the most feebly punctate 31 



Metanotum punctate or sculptured, opaque. 



Abdomen triangular ; pronotum anteriorly, truncate, the upper margin acute. 



Trigonogastra Ashmead. 

 Abdomen oblong-oval ; pronotum anteriorly rounded, the upper margin not acute. 



Bubekia Dalla Torre. 



31. Second dorsal abdominal segment at apex, not broadly, deeply semicircularly emarginate, either 



straight or with only a slight incision 32 



Second dorsal abdominal segment at apex broadly and deeply semicircularly emarginate. 



Cyrtogaster Walker. 



32. Head wide but not thick ; antennae subfiliform, the second ring-joint larger than the first, the scape 



slender, but hardly reaching to the front ocellus, the funicle joints not longer than thick. 



Polycyrtus Westwood. 



Head large and thick, much wider than the thorax ; antennse clavate, the ring-joints equal, annular, 



the scape long and slender Tityros Walker (type T. pareia Walk.). 



33. Metanotum with one or three carinse , 34 



Metanotum broad, without a median carina. 



Abdomen with the second segment occupying fully one third the whole surface. 



Pterosema Forster. 



34. Metanotum with the lateral carinse or folds wanting, the median carina present, usually abbreviated. 



Eurydinota Forster. 

 Metanotum long, closely punctate, tricarinate Bubekia Dalla Torre. 



Tribe IV. Cratomini. 

 1875. Caratomides, Subtribus, Thomson, Hym. Skand., IV., p. 216. 

 1878. Caratomides, Subtribus, Thomson, optts cit, Y , p. 44. 



This group is based upon the genus Cratomus Dalman, estabhshed in 1820. 

 Later the genus was changed to Caratomus. I have however, retained the original 

 spelling and shall call the group Cratomini. 



