June, i90j.] ASHMEAD : CLASSIFICATION OF THE ProCTOTRYPOIDEA. 97 



3. Scutelluin ending in a strong awi-shaped spine, short tliorn or tubercle 5 



Scutellum lengthened, triangular, or produced into a long, acute spine. 



Thorax not strongly compressed from the sides 4 



Thorax strongly compressed from the sides. 



Head large, rounded or quadrate Piestopleura F'drster. 



(type Platygaster catillus Walk.). 



4. Mesonotum with deep furrows, parallel posteriorly; club of antennre abrupt, 4- 



jointed XestonotUS Forster (type X. rnfidi^ens FoRST. ). 



Mesonetum with feebly impressed furmws or the furrows absent ; club of an- 

 tenna; 4-jointed Amblyaspis Forsler (type A. alicna FoRST.). 



5. Scutellum with a short thorn or tubercle at tip 6 



Scutellum with a strong, awl-shaped thorn at tip. 



Lateral ocelli nearer the inner magin of the eye than to the front ocellus ; 



club of antenncE 4-jointed Leptacis Forster. 



(type PlcUygi-isla- tipuhi KiRBV). 

 Lateral ocelli not nearer the margin of the eye than to the front ocellus ; club 



of antenn;^ 3-jointed Isorhombus Forster (type unknown). 



6. Abdomen not especially lengthened 7 



Abdomen very much lengthened. 



Club of antennre 5-jointed ; lateral ocelli as near to the front ocellus as to 



the eye margin Polymecus Forster. 



(t>'pe Platygaster creterus Walkkr). 



7. Second ventral segment normal 8 



Second ventral segment abnormal, strongly compressed, sack-like, the terminal 



segment narrowed, resembling a tail. 

 Lateral ocelli their width from the eye margin ; club of antenna: 4-jointed. 



SactOgaster Forster. 

 (type Fpimecis z'eiitm/is Westw.). 



8. Lateral ocelli close to the eye margin, touching or almost touching it ; club of 



antennas 4-jointed, the joints briefly pedicellate Synopeas Forster. 



(type .S". melampus Forst.). 



9. Scutellum not cupuliform 10 



Scutellum cupuliform, similar to the cynipoid genus Eucoila. 



Lateral ocelli fully their width from the eye margin ; mesonotum without a 

 trace of furrows Ccelopelta Ashmead (type C. iiiirabilis Ashnl). 



10. Scutellum convex or cushion- shaped 12 



Scutellum flattened, or at most subconvex. 



Mesonotum with the parapsidal furrows more or less distinct 11 



Mesonotum without parapsidal furrows. 



Antennre lO-jointed, the club 3- or 4-jointed Anopedias Forster. 



(type A. obscicriis Thoms. ). 



Antennre 8-jointed, the club 3-jointed Fidiobia Ashmead. 



(type F. Jlavipes AsHM. ). 



11. Antenna; long, S-jointed, the club not jointed AmitUS Haldeman. 



(type Amittis aleurodinus H.\Ln. ). 



12. Scutellum without a tuft of hairs at tip I3 



Scutellum with a tuft of hairs at tip. 



