YORKSHIRE HYMENOPTERA IN 1879, 1880 AND 1881. 107 



second brood. Shortly after from the same pot came up an 

 ichneumon-fly, which I forwarded along with others to Mr. 

 Bridgman, and he returned unnamed and doubtfully a Mesoleius. 



X M. dubius Holing. Found at Holgate in iS8i (Wilson). 



M. aulicus (Gr.) | 

 X M. opticus (Gr.) J 



York, 1879 or 1880, hovering about some willow stumps con- 

 taining larvae and pup^e of Sfhecia bemheciformis. These specimens 

 came from the stumps, but whether from these larvje or not I am not 

 prepared to say (Wilson, Nat., vi. 153). 



X M. insolens (Gr.) One example taken at Holgate, 1881 

 (Wilson). 



X Trematopygus atratus i7^//«^;-<?//. York, 188 1. This is 

 returned as new to the British fauna. I have had several examples 

 from CrcE-SHS septenirionalis. Mr. Bridgman also informs nie that 

 "it has been bred on the continent from the same host" (Wilson). 



xTryphon elongator (Fab.) York, September 1879, 

 beaten out of a hawthorn hedge (Wilson, Nat, vi. 153). 



Captured amongst nut-bushes, Holgate, in 1881 (Wilson). 



X T. rutilator ( L.) Several along the Poppleton road, York, 

 in 1 88 1 (Wilson). 



Cteniscus lituratorius (L.) Several examples taken and 

 dozens more might have been; some in the act of ovipositing and 

 numbers flying near and amongst gooseberry bushes, where its 

 host Nematus ribesii feeds. This species lays its eggs in its victims 

 when they have passed their second moult. York, 1881 (Wilson). 



X Metopius micratorius (Fab.) A male captured on Rom- 

 balds' Moor in 1878. This is a fair addition to the list (Bairstow). 



M. dentatus (Fab.) I took a very fine male on Goole 

 Moor. It is worth noticing that this species is subject to great 

 variation in size: all the insects I have received from the East 

 Riding are considerably larger than those from the "\^'est Riding 

 (Bairstow). 



