BRITISH iCHNEUMOKg. 



Table of Tribes. 



Areolet not obliquel)' quadrate ; abdomen more or less strongly com- 

 pressed. 



External radial abscissa basally angled at junction with submar- 

 ginal nerv'ure. 



Second recurrent ner\'ure emitted beyond first submarginal nervure. 



Hind tarsi not spatuliform, nor metathorax apically produced. 



Hind femora mutic, with no trace of central tooth beneath. 



Stigma and radial cell very broad, with the latter short. 



Submarginal nervure usually distinct ; median of hind wing basally 

 strong. 



Clj-peus convex and compressed ; 



hind tibiae incrassate , . . . Plectiscides. 



Submarginal nervure obsolete ; med- 

 ian nervure basally pellucid . . PORIXONIDES. 



Clypeus neither convex nor com- 

 pressed; hind tibiae slender . Cremastides. 



Stigma and radial cell both narrow 



and elongate Campoplegides. 



Hind femora very distinctly dentate 



centrally beneath . . . . Pristomerides. 



Hind tarsi spatuliform ; metathorax 



apically produced . . . . Anomalides. 



Second recurrent nervure emitted 



before the submarginal . . Ophionides. 



External radius continuous with first 



submarginal nervure . . . . Paniscides. 



Areolet obliquely quadrate ; abdo- 

 men not at all compressed . . Mesochorides. 



I have considered very carefully the natural association of these Tribes 

 ijiter se, and placed them according to their relative characters. The 

 Porizonides share with the Plectiscides the basally strong median nervure 

 of the hind wing, while differing less in the obsolete intercubital or sub- 

 marginal nervure (the inner side of the wanting areolet) than in their 

 remarkably broad and short radial cell of the front wings, for in certain 

 of the first Tribe also the submarginal is obsolete. Next comes the group 

 of three Tribes, of which the Campoplegides is bewilderingly numerous 

 and the two before and after it comprise less than a dozen kinds, which 

 might be included with some propriety were it not that the Cremastides 

 bear one or two minor features not found there and the Pristomerides 

 form a very natural link with the Anomalides. This link is less apparent 

 in our Fauna than in Mexico, as I have indicated in my " Revision of the 

 Ichneumonidae," where the somewhat close connection of Anomalides 

 and Ophionides is also commented upon, though in Britain they cannot 

 be mistaken. Here direct association ends, and we find the Paniscides 

 quite distinct from any other Ophionid Tribe except the Mesochorides 

 whose economy, I firmly believe, Avill eventually replace them in Graven- 

 horst's original position among the Cr3'ptinae, though there exists an 

 obviously intermediate genus in Australia and India. Nor can we yet be 

 satisfied with the Pimplid connection of the genus Exetastes assigned it 

 in my third volume, for the cocoons are identical in every way with those 

 of certain Paniscides, and since igo8 both Dr. Roman and Herr Pfankuch 

 have been good enough to convey their uncertainty upon this point to 

 mc, though neither felt justified in more exactly placing that genus. 



