100 NOTES <>N ' HALCIDl.E. 



P- > Stigma not curved downward. 



<3 Fore femora with bordered tips. Hind tibiae 



with a row of fine spines. - - Pachtchirus. 



<3 <i Fore femora without bordered tips. Hind 

 tibiae with no row of spines. 

 — Stigma regularly club-shaped. - - Rhopalicus. 



== Stigma not club-shaped, much incrassated 



on the inner side. - - - Acrocormus. 



AA Femora slender. 



V Piadius twice longer than the ulna. - Etroxys. 



VV Radius not twice longer than the uhia. - Pteromalus. 



The above Synopsis of genera, like the rest of the classifications 

 in these notes, is translated from Prof. Foerster's " Studien," pt. 

 Chalcidiae, &c, which is the most complete and metbodical work on 

 the families and genera of the tribe that has yet been published, and 

 with the introduction which treats of the structure of the Chalcidiae 

 and of the preceding literature relating to them, may be used as the 

 means of more progress in the knowledge of the species. Of these 

 he has published vei*y little, and there is a very large untouched 

 field for the works of future observers. The investigation of the 

 Pterornalidae is much more difficult than that of the other families, 

 owing to the immense number of species in the genus Pteromalus and 

 the close affinity between many of them, and the frequent great 

 difference in colour between the male and the female so that the 

 sexes often cannot be recognized as one species till they are reared 

 from the pupa. 



Megapelte, Foerst., is another name for Eunotus which has also 

 been named Trityphus and is an example of a small distinct family. 

 Tridymus and Seladerma are identical, so also are Stictonotus and 

 Semiotus. Oxyglypta is nearly allied to the two preceding genera, 

 and the three represent a family which may be distinguished from 

 the Pterornalidae by the strongly-marked sutures of the parapsides. 

 The genus Metopou must be annulled, being the female of Psilocera. 

 Platyterma and Amblymerus are sections of Pteromalus. Pachy- 

 chirus is an alteration of Cheiropachys ; it and Etroxys indicate a 

 transition to the Cleouymkke. 



Pteromalus insularis. Fain. — iEneus, crassus ; caput thorace 

 paullo latius; antennas piceae, subclavatae, sat graciles, articulo lo 

 luteo. clava longi-conica ; abdomen depressum, sublanceolatum, sub- 

 sessile, subtus valde angulatum, thorace brevius et angustius; pedes 

 albidi, femoribus nigris ; alae diaphanae, testaceo pallidissimo venosae. 



Female. — ^Eneous, very stout. Head and prothorax finely 

 squamous. Head a little broader than the thorax. Antennae 



