THE ENTOMOLOGIST. 



35 



a. Hind head deeply excavated. Vertex and neck 



separated by a sharp edg(>. - - - L.\beo. 



b. Hind head shghtly concave. Vertex and neck 



not parted by a sharp edge. 



'■'•' Fore tarsi of the female with long claws. Pro- 

 thorax of the male distinctly visible above, 

 not longer than the mesothorax. 



f Fourth joint of the fore tarsi of the female 

 much longer than the third. Prothorax of 

 the male and female as long or nearly as 

 long as the mesothorax. - - - Chelogynus. 



ft Fourth joint of the fore tarsi of the female as 

 long as or a little longer than the third. 

 Prothorax of the male aud female much 

 shorter than the mesothorax. - - Anteon. 



** Fore tarsi of the female without long claws. 

 Prothorax not visible above, or longer than 

 the mesothorax. 



f Prothorax much longer tlian the mesothorax. 

 Mesothorax with no trace of the fun'ows. 

 Wings short, spatulate. - - - Mysjkopiiouus. 



If Prothorax not or slightly visible above. Meso- 

 thorax wide, with distinct farrows. Wings 

 ample. ..... Aphelopos. 



There are no illustrations here of tlie Ceraphronidoc, 

 Diapridas, Be]ylida3, Proctutriipida35 and Heloridae ; they are 

 figured in Jurine's ' Nouvellc Methode.' The Ceraphronidie 

 come next to the Sctlionidaj, and, like them, are distinguislied 

 by the sculpture at the base of the abdomen, and by a simple 

 costal vein. The Diaprida3, like the great part of the Platy- 

 gaslerida3, have no wing-veins, or none beyond the base of 

 the wing. In the Belytida3 and Proctotrupida) there are 

 indications of an increase of bones in the wing, and this 

 increase is more extensive in the Heloridae. The Dryinida) 

 come last, and are distinguished by their rapid movement, 

 and by their mimicry of some of the aculeate llyraenoptera. 



Additional notes on the preceding families, which conclude 

 the series of British Oxyura, are deferred till opportunity 

 occurs of examining in detail the genera and their respective 

 species. 



Fkancis W.vlkek. 



