5* NOTES ON CHALCIDIJ2. 



latter a family of the tribe of Chalcidiae. The investigation of the 

 connecting links or debateable species between genera is very 

 interesting, and there arc instances of these intermediate forms in 

 the Eurytornidae. The following notes on these and on other species 

 are preceded by a_Synopsis of the British families of Chalcidiffi, and of 

 the British genera of Eurytornidae, and by a notice of the variation 

 of structure in the British species of Isosoma. 



A. 

 a. 

 b. 



* 



+ 



o 



+ + 





 00 



§§ 



X 

 XX 





 00 



-t__i_ 



•It 



t 



Tarsi 5-jointed. 



Hind femora much incrassated. ... ... 1. Cbalcididae. 



Hind femora not or slightly incrassated. 



Sides of the mesopectus with cavities. Middle 

 tibia? usually with not very stout apical 

 spines. 



Antenna? seated somewhat above the mouth. 



Thorax very gibbous. 4. Perilampidae. 



Thorax not very gibbous. 



Prothorax well developed, subquadrate or 

 attenuated and conical. 



Cubitus extremely short. 



Abdomen with a peculiar sculpture, cylin- 

 drical in the male, conical and with no 

 prominent oviduct in the female. ... 5. Ormyridae. 



Abdomen with no peculiar sculpture, more 

 or less compressed in the male, with a pro- 

 minent oviduct in the female. ... ... 2. Toryrnidae. 



Cubitus not very short. 



Prothorax subquadrate. Abdomen slightly 



compressed, convex above. ... ... 3. Eurytomidae. 



Prothorax elongated, couical. Abdomen flat 



above. Hind tibiae with stout spines. ... 9. Cleouymidae. 



Prothorax not much developed, short, trans- 

 verse. 



Abdomen petiolated. ... ... 13. Sphegigasteridae. 



Abdomen sessile. 



Antennae moniliform. ... ... 12. Hormoceridae. 



Antennae filiform, cylindrical or clavate. 



Scutellum small. ... ... ... ... 14. Pteromalidae. 



Scutellum very large. ... ... ... 15. Eunotidae. 



Antennae seated at the border of the mouth. 



Antennae elongated, more than 10-jointed. 10. Spalangidre. 



Antennae short, 10-jointed. ... ... 11. Pirerridsa. 



Sides of the pectus without cavities. Middle 

 tibiae with a very short apical spine. 



Antennae with more than eight joints. 



