Mar. 1899.] ASHMEAD : On SyNOPSES OF FAMILIES OF H YMENOPTERA. 51 



Clypeus broadly truncate at apex ; maxillary palpi 6-jointed, labials 4-jointed. 



Zeleboria Sassure. 



Clypeus not strongly produced anteriorly, the apex subemarginate or excised ; 

 maxillary palpi 6-jointed, joints 1-3 rather short, 4-6 long, subequal, 5 or 6 

 times longer than thick ; labials 4 -jointed, the first joint long, slender, about 

 as long as 2-4 united Scotsena King. 



8. Clypeus not produced, excised anteriorly ; maxillary palpi 6-jointe(l, joints 1-3 



short, 4-6 very long ; labials 4-jointed Aeiurus Klug. 



9. Body rather stout, not elongate ; metathorax very short, obliquely transversely 



compressed or sublamellar ; pygidium abnormal, narrowed, compressed or de- 

 flexed ; claws usually cleft or bifid, rarely simple II 



Body narrow, slender and elongate ; abdomen cylindrical ; thorax above flattened ; 

 metathorax elongate or at least not very short or sublamellar ; pygidium normal ; ' 

 claws either simple or cleft. 

 Head without a sulcus or grooved line on temples behind the eyes ; abdomen 



cylindrical lo 



Head quadrate with a sulcus or grooved line on temples behind the eyes ; 

 abdomen longer than the head and thorax united. 

 Claws simple ; grooved line behind the eyes curved and not quite extending 

 to the eyes ; maxillary palpi 6-jointed, labials 4-jointed ; first ventral seg- 

 ment simple (Jly ptometopa Ashni. 



Claws cleft ; grooved line behind the eyes straight aud extending from eye 

 • almost to the occiput ; maxillary palpi 6-jointed, labials stout, 4-jointed ; 

 first ventral segment with a tooth beneath. 



Rhagigaster Gnerin = Diamma Sauss. nee Westw. 



10. Claws cleft. 



Head seen from above rounded, not or scarcely longer than wide ; eyes very 

 large ; ocelli present ; mandibles 3- or 4-dentate ; maxillary palpi 6-jointed, 

 labials 4-jointed Trachypterus Guerin = Diamma Westw. 9 • 



Head oblong, more than twice longer than wide ; eyes minute ; ocelli absent ; 

 mandibles bidentate at apex ; maxillary and labial palpi both 4-jointed. 



Eirone WeshvooJ. 



Claws simple. 



Eyes minute ; ocelli wanting ; maxillary and labial palpi both 4-jointed. 



Aeiurus King. 



Eyes large, oblong-oval ; ocelli present ; mandibles at apex bidentate, the lower 



tooth much the longer ; maxillary palpi 4-jointed Methoca Latreille. 



11. Head seen from above triangular (similar to Tn'gonopsis Veriy), without ocelli ; 



pronotum quadrate ; second dorsal abdominal segment with two transverse 

 folds ; eyes small, oval, reaching base of mandibles ; clypeus very short, trun- 

 cate anteriorly ; mandibles simple, falcate ; maxillary palpi 4-jointed, labials 



3-jointed; claws cleft Iswaroides ^j/zw. (Type/. ioeMei AsHM.y^ g. n. 



Head large, quadrate, much wider than the thorax ; anterior margin of mesonotum 

 curved, the angles rounded ; second dorsal abdominal segment smooth, without 

 transverse folds or carinae ; maxillar)^ palpi 6-jointed ; claws simple. 



Ariphron Erichson. 



