164 The Insects of Cambridgeshire 



stigma, Fb. Dasychira fascilina, L. is plentiful in some 

 seasons on the Hills Road, and Lasiocampa quercifolia, L. is 

 common in the Fens. 



All of the Drepanulidae, except D. sicula, Hb., may be 

 found in the county. Stauropus fagi, L. is occasionally found 

 on the Gogmagogs, where Mr Jones has taken a specimen of 

 Notodonta dictaeoides, Esp. 



Of the Cymatophoridm, C. octogesima, Hb. is most 

 worthy of notice ; it is to be found in fair numbers in most 

 parts of the county ; more especially in the Fens. 



Noctuae. 



Among the NOCTUAE, the Leucaniidae, reed and grass 

 feeding insects, are naturally confined to marshy places, and 

 many of them are only to be found in the Cambridgeshire 

 Fens. Before enumerating these however, mention must be 

 made of the Cambridge form of Bryophila muralis, Forst., 

 known as B. impar, Warren ; B. muralis, Forst., is a coast 

 species, and the isolated inland race at Cambridge has ac- 

 quired a peculiar facies which distinguishes it from B. mumli*, 

 Forst., in all of its British localities. It occurs sparingly on 

 the old walls of the town ; many of the best walls have been 

 recently demolished, but impar is so widely distributed in 

 the town that it is not likely to be exterminated. Less than 

 twenty years ago Acronycta strigosa, Fb., could be found all 

 along the chalk on the edge of the Fens, from the Gogmagogs 

 to Fordham, but it has become very scarce during the last 

 twelve years and is now almost extinct. Arsiloncke albo- 

 venosa, Goze, may still be found in the Fens, but is not nearly 

 so plentiful as it was fifteen years ago. Leucania obsoleta, Hb. 

 occurs sometimes in fair numbers near Ely, where Senta ma- 

 ritima, Tausch. may also be found, but in smaller numbers ; 

 Leucania straminea, Tr., is not common, but occurs in 

 the reed beds of the upper Cam, where Nonagria neurim, 

 Hb. was not uncommon a few years ago, but its favourite 

 reed beds have become dry and overgrown with rank herbage, 



