1913.] 247 



species has occurred, although there is no reason to doiibt the correct- 

 ness of the record, it has been thought advisable to note the fact. 



It has not been considered necessary to indicate the relative 

 scarcity or the reverse of a species, as many which are taken in- 

 frequently are probably plentiful in their own particular, though it 

 may be restricted, locality ; or their occurrence is dependent on the 

 distribution of their food-plant ; or again they must be sought for in 

 a special manner, e.g., wood-borers and root-feeding species. 



The determination of many of the more critical species, and in 

 some cases of entire genera, has been confirmed by expei'ts, while that 

 of the remainder is, I believe, to be depended on, as also are the 

 localities. On the other hand, in a list like this, errors are not im- 

 possible and in such cases will be subject to correction. 



I am much indebted to Dr. D. Sharp, Messrs. Balfour-Browne, 

 W. Bevins, E. G. Elliman, J. H. Keys, and J. R. le B. Tomlin for their 

 kindness in examining difficult species and genera, and to the Hon. 

 Chas. Rothschild, who since he has acquired it, has kindly allowed us 

 to continue collecting in Wood Walton Fen. 



Notes on Localities. 



Cambridgeshire. 



Chatteris. The locality Chatteris consists of a very varied collecting 

 ground, and calls for special notice. It contains (1) CvUtivated fen, e.g., 

 Chatteris Acre Fen, fields divided by ditches filled with reeds, Carex, Juncus, 

 and various water-plants ; (2) Uncultivated fen, e.g., Chatteris Tvirf Fen, S. ; 

 (3) Strong land having one small jjortion fairly well-wooded with old oaks and 

 maples. These varied conditions account for the large number of species the 

 locality contains. 



HoLwooDS. Cultivated fen, the forest trees only willows and poplars. 



Chippenham and Wicken are well known and need no comment. 



WiMBLiNGTON FiRELOTS and HORSEWAY are two pieces of uncultivated 

 fen with a more restricted Flora than Chippenham and Wicken. 



Mepal and Eabith lie on the banks of the Ouse, a tidal river ; the insects 

 recorded from these localities are almost entirely from flood rubliish, some of 

 which comes down from the county of Huntingdon. 



DoDDiNQTON is an old oak wood of limited extent, the only wood among 

 the Cambridgeshire localities. 



Babraham, Cherryhinton, Fleam Dyke, and Newmarket lie on the 

 chalk. 



Madinqley is partly chalk and partly strong land. 



