NOTES ON HYMENOPTERA. 95 



upon Formica Jiava for its subsistanee, and this may also be 

 the case ^vith other species of insects. 



Mr. Rothney observed a very interesting occurrence in the 

 habits of Formica fuliginosa ; the nests of this ant are ex- 

 tremely abundant in old oak trees at Barham, in Suffolk; 

 two such trees were situated on the opposite sides of a gravel 

 pathway, beneath which the ants had excavated a tunnel of 

 communication. 



Tetramorimn ccespitum was found at Shirley ; the only 

 other locality I know of in the vicinity of London is at 

 Plumstead Wood ; this ant is much more abundant on the 

 fiea-coast. 



Mr. Rothney found the rare bee Ccelioxys quadridentaia 

 plentifully at Ipswich. I have only taken it at Deal and in 

 Yorkshire. 



Many, like myself, have no doubt found it most plea- 

 surable to visit some locality, rendered historic through the 

 records of former Entomologists ; amongst such, Mousehold 

 Heath, near Norwich, is conspicuous; here, as Mr. Curtis 

 informed me, Kirby, Marsham, Wilkin, as well as himself, 

 had collected insects ; it was in fact a favourite spot for that 

 purpose with Curtis himself. Judging from the success I 

 met with, on a visit of a few hours, I should be inclined to 

 rank it very high as an Hymenopterous treasury. The ele- 

 vated situation of the heath, its delightfully broken and hilly 

 surface, backed on the north-west by a wood of pines ; its 

 many giavel-pits, some in operation, others long deserted, 

 and left just in the right condition to attract fossorial insects; 

 the extensive portions covered with the purple heath, inter- 

 mixed in parts with bramble bushes and fern, altogether 

 combine to make it just the locality that bees and fossorial 

 JSymenoptera most delight in. A visit to this spot, at 



