1903] ASIIMEAD : — CYXIPOIDEA 1 5 I 



Antennae in 9 14-jointed, in $ 15-jointecl, the first joint of the flagellum 

 shorter than the two following united (sexual form) 



Neuroterus Hartig = Ameristus Forster 



(Type N. politus Hartig.) 



Antennae in 9 13-jointed, in $ 14-jointed, the first joint of the flagellum 



very long, bent or curved, and as long or longer than the three following 



joints united (sexual form) . . . Dolichostrophus Ashmead 



(Type Cynips majaUs Bassett.) 



13. Scutellum without foveae at base, or with a transverse arcuate furrow at base ; 

 if the foveae are more or less distinct they are separate by a very delicate carina 

 and the mesonotum is tiot separated from the scutellum by a delicate carina 

 and grooved line, the base of the mesonotum having a more or less deep 

 median emargination or depression . . . . . . . 14 



Scutellum with two distinct foveae at base. 



14. Scutellum laterally immargined ....... 15 



Scutellum laterally margined. 



Parapsidal furrows deep, distinct; claws of hind tarsi simple; antennae in 9 

 14-jointed, slender, in $ 15-jointed (sexual form) Dryocosmus Girard 



(Type D. cirrospilus Girard.) 



15. Mesonotum not entirely smooth, alutaceous or very finely coriaceous, with the 

 parapsidal furrows indistinct or vaguely defined, never deep or sharply defined ; 

 middle area of metathorax with one or two more or less distinct median 

 longitudinal carinae, claws simple . . . . . . . 16 



Mesonotum smooth, with deep, distinct, sharply defined parapsidal furrows ; 

 claws simple or with a tooth beneath towards base . . . . 19 



16. No delicate transverse grooved line between the mesonotum and the base of 

 the scutellum, the basal margin of the former arcuately emarginate, the furrow 

 continued towards the tegulae ....... 17 



A delicate transverse grooved line between the mesonotum and the base of the 

 scutellum, the basal margin of the former straight .... 18 



17. Temples in 9 somewhat broad, in $ flat, the eyes very large, antennae in 9 

 14-jointed, in $ 15-jointed, the third joint the longest (sexual form.) 



Neuroterus Hartig = Spathegaster Hartig 



(Type Spathegaster petioliventus Hartig.) 



iS. Head not broadened behind the eyes, the cheeks very short, the malar furrow 



wanting or subobsolete ; scutellum with the foveae united at base; metathorax 



with two median angular divergent ridges; antennae in 9 14-jointed, the 



third and fourth joints equal, in $ 15-jointed (sexual form) 



Plagiotrochus Mayr 

 (Type Cynips ilicis Fabr.) 



