58 ICHNEUMONIDiE. 



Pseudeuf/alta might, perhaps, be placed in closer association with 

 EpJiialtes. Nor are the Hmits of the tribe well defined, since 

 some doubt must still be entertained respecting the position of 

 (Edematojisis and the aUied genera, in spite of their elongate 

 hypopjgium. Their economy, however, is now proved to be 

 related with the Lepidoptera, while that of the present group 

 would appear to be confined to the lignivorous Coleoptera, and we 

 must regard the records of Eatzeburg, and ])robably also of 

 Criraud, to the contrary, with suspicion. Throughout the parasitic 

 Hymenoptera it will be noted that the head is usually cubical 

 in tliose genera (e. g. Jlecaholus, Uisteromerus, Cheiropachus and 

 the present group), which prey upon lignivorous larvje. AV'ith its 

 wealth of forests, and the Longicorn * and Lamellieorn beetles 

 preying upon their timber, India will prove very rich in Xoridides, 

 though, unfortunately, noue have yet been associated with 

 specified hosts. 



Table of Genera. 



1 (8) Areolet of the winrr distinct and 



entire. 



2 (7) Areolet broadly sessile and pen- 



tagonal. 



3 (4) Front tibJto neither intumescent 



nor basally constricted Agexora, Cam., ]>. ilO. 



4 (3) Front tibiae both intnmescent 



and basally constricted. 



5 (6) Clypeus apically dentate ; meta- 



thoracic spiracles circular. . . . Echtheus, Grav., p. 60. 



6 (5) Clypeus apically rounded; meta- 



thoracic spiracles linear .... Tohbda, Cam., p. 01. 



7 (2) Areolet petiolate and triangular ; 



clypeus not dentate Pseudeugalta, Asbni., p. 66. 



8 (1) Areolet of the wing entirely 



wanting. 



9 (10) Tarsal claws bifid ; clypeus not 



basally discreted Eugalta, Cam., p. 70. 



10 (9) Tarsal claws simple ; clypeus 



basally discreted from face. 



11 (12) Abdomen not impressed ; meta- 



notum simple Bathymeris, Cam., p. 75. 



12 (11) Abdomen distinctly impressed ; 



metanotal arete entire Xylonomus, Gra\-., p. 76. 



* Mr. Gaban informs me that some six hundred and fifty species of this 

 group of beetles have ah-eady been described, that about eight hundred will be 

 known when the 'Fauna of India' is completed, but that he estimates that 

 fully a thousand kinds inhabit India. 



