INTRODUCTORY PAPERS ON ICHNEUMONIDJE. 123 



notus, Pachymerus, Cremastus, Porizon, and Atractodes, in this 

 family. Of these Campoplex has been subdivided into the 

 genera Campoplex, Charops, Cymodusa, Sagaritis, Casinaria, 

 Limneria, Meloboris, Pyracmon, Canidia, Nemeritis, and Angitia, 

 by Holmgren in his ' Monographia Ophionidum Sueciae ' (Sv. Ak. 

 Handl. ii. (8), pp. 1-158). Anomalon was subdivided into the 

 genera Schizoloma, Heteropelma, Exochilum, Anomalon, and 

 Trichomma, by Wesmael in his " Eevue des Anomalous de 

 Belgique" (Bull. Ac. Brux. xvi. (2), pp. 115-139). Macms 

 contains the males of Coleocentrus, belonging to the Pimplidas. 

 Pachymerus includes Schiodte's Collyria and Curtis's Pristomerus. 

 Exetastes, Arotes, and Banchus were separated as a distinct 

 family (Banchidie) by Gravenhorst. Mesochorus was placed by 

 him in the Cryptidae, and Scolobates in the Tryphonidae. 

 Neurateles, Katz., is omitted ; Marshall included it in his 

 catalogues on the authority of Haliday, who told him he had 

 discovered it in Britain. We do not know that anybody has 

 described the genus since Katzeburg, who curiously in his ' Die 

 Ichneumonen ' has mentioned no Orthocentrus ; following his 

 description, and taking this latter fact into consideration, we 

 believe that Neurateles papyracea is only an Orthocentrus, and 

 the description is not complete enough to identify it. Fdrster 

 has defined it as a genus of his family Orthocentroidaa, slightly 

 altering the name ; but Forster's changes are so great and 

 require so much confirmation that we cannot generally adopt 

 them. Holmgren's ' Monographia,' the best handbook to this 

 family, includes thirty-three named divisions in its Conspectus 

 Generum : of these all but Angitia, Holmgr., and Seleucus, 

 Holmgr., occur in Britain ; and to the other thirty-one genera 

 are added Henicospilus, Steph., Agrypon, Forst. (very doubtfully, 

 and only because included by Marshall), Collyria, Schiodte, and 

 Arotes, Gr., besides Forster's divisions of Plectiscus. Wesmael's 

 subgenera of Anomalon are only included as subgenera by 

 Taschenberg ; and Vollenhoven says " in our opinion Wesmael's 

 subgenera .... have no claim to be retained as genera ; " the 

 same with Holmgren's subgenera of Paniscus. 



With but very few exceptions the Ophionidae are parasitic on 

 Lepidoptera, and most of them are remarkable for the cocoons 

 which their larvae spin after leaving their host. These vary 

 much, those of many species being distinctly banded, and are 



