June, 1903.J ASH.MKAD : CLASSIFICATION OF THE PrOCTOTRYPOIDEA. 89 



7. Mesonolum with parapsidal furrows 8 



Mesonotum without parapsidal furrows. 



Mandibles bidentate Acolus Forster. 



Mandibles tridentate Acoloides Ilo'warti. 



S. First abdominal segment petioliform ; eyes bare ; lateral ocelli away from the eye 



margin Thoron llaliday (type T. vietallicus Hal.). 



9. Mesonotum without parapsidal furrows lo 



Mesonotum with parapsidal furrows 13 



10. Lateral ocelli close to the eye margin ; antenna; filiform, moniiifonn or juhmonili- 



form. 



Basal nervure present Ii 



Basal nervure wanting 12 



11. Head subquadrate, only slightly wider than the thorax ; antennje slightly thickened 



toward apex; basal abdominal segment petioliform, much narrower than the 



metathorax BsUS Holiday. 



Head transverse, much wider than the thorax ; eyes bare ; antenntc tapering 

 toward apex ; basal abdominal segment as wide as the metathorax. 



Aeolus Forster. 



12. Head transverse, scarcely wider than the thorax; eyes hairy; antenna; slightly 



thickened toward apex Acoloides Howard. 



13. AntennK filiform, the flagellar joints about thrice as long as thick. 



Thoron Haliday. 



Subfamily III. TELEASIN.-E. 



This most interesting group is quite distinct from the others in an- 

 tennal, abdominal and venational peculiarities. The antenna; are 

 inserted rather close together on a clypeal prominence ; the abdomen 

 is always distinctly margined at the sides, narrowed towards the base, 

 the third segment the longest ; while the marginal vein is always long 

 or greatly lengthened, the stigmal vein minute, hardly developed. 



The group differs also in habits from the Telenomina; and the 

 Baeinffi, since the species attack only the eggs of beetles, and not 

 the eggs of Lepidoptera, Hemiptera and spiders. 



Table of Genera. 



1. Females 2 



Males ... 9 



2. Abdomen long-oval or long-ovate, the first segment petioliform, longer than 



wide 3 



Abdomen broadly oval, the first segment wider than long 7 



3. First abdominal segment without a horn 4 



First abdominal segment with a horn. 



Postscutellum with three spines Pentacantha .•/.r//w^(7a'. 



(type P. canadensis AsHM. ). 



4. Mesonotum with parapsidal furrows 5 



Mesonotum without parapsidal furrows.. 6 



