THE ENTOMOLOGIST. 59 
a. Hind head deeply excavated. Vertex and neck 
separated by a sharp edge. - - - LaBro. 
b. Hind head slightly 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. 
+ Fourth joint of the fore tarsi of the female 
much longer than the third. Prothorax of 
the male and female as long or neatly as 
long as the mesothorax. — - -  CHELOGYNUS. 
‘it Fourth joint of the fore tarsi of the female as 
long as or a little longer than the third. 
Prothorax of the male and female much 
shorter than the mesothorax. - - ANTEON. 
* Fore tarsi of the female without long claws. 
Prothorax not visible above, or longer than 
the mesothorax. 
+ Prothorax much longer than the mesothorax. 
Mesothorax with no trace of the furrows. 
Wings short, spatulate. = - - Mysrropnorus. 
+t Prothorax not or slightly visible ane Meso- 
thorax wide, with distinct furrows. Wings 
ample. - - - - - APHELOPUS. 
There are no illustrations here ai the Ceraphronida, 
Diapride, Belytide, Proctotrupide, and Heloride; they are 
figured in Jurine’s ‘ Nouvelle Méthode.’ The Ceraphronida 
come next to the Scelionide, and, like them, are distinguished 
by the sculpture at the base of the abdomen, and bya simple 
costal vein. The Diapride, like the great part of the Platy- 
gasterida, have no wing-veins, or none beyond the base of 
the wing. In the Bely tide ‘and Proctotrupide there are 
indications of an increase of bones in the wing, and this 
increase is more extensive in the Heloride. The Dryinidex 
come last, and are distinguished by their rapid movement, 
and by their mimicry of some of the aculeate Hymenoptera. 
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. 
Francis WALKER. 
