66 THE ENTOMOLOGIST. 



Till I measured the Eosevear specimen the above was the largest 

 ** high " male or var. forcipata known to me. It is probable 

 that Mr. Bright's Freshwater specimen, on my method of 

 measurement, has callipers slightly more than 10 mm., because 

 they were apparently measured in situ. The latter method 

 is quite unsatisfactory when a large series is being measured to 

 ascertain the amount of variation, because the degree to which 

 the bases of the calHpers are telescoped into the last abdominal 

 segment differs in a series of individuals. So I always extract 

 the callipers to expose the small process, a kind of condyle, 

 which is situated on the external margin of the calliper and is 

 usually only just hidden by the last abdominal tergum. The 

 callipers are then laid on squared mm. paper and measured in a 

 straight line from the "condyle" to the distal extremity, the 

 curvature being disregarded. This is permissible, because, though 

 " high " males possess straighter callipers than do the "low," as 

 the correlation is constant the curve of variation is not vitiated. 

 Unfortunately the body of the Eosevear " high " male was 

 damaged either at capture or in subsequent transport in spirit, 

 so that it could not be set symmetrically for photographing. 



I have not yet measured the other Eosevear males, but there 

 are many which closely approach the example illustrated. Taken 

 altogether they seem to possess in both body and callipers the 

 largest average dimensions of any collection from one locality I 

 have seen. 



Zoological Laboratory, Cambridge : December, 1913. 



THE NEUEOPTEEA OF NOTTINGHAMSHIEE. 

 By J. W. Carr, M.A., F.L.S., F.G.S. 



(Professor of Biology, University College, Nottingham.) 



The distribution of these insects in Britain is still so in- 

 sufficiently worked out that a list of the species recently taken 

 in Nottinghamshire may be of some use. With few exceptions 

 all have been collected during 1912-13 by myself, and every 

 specimen recorded has been identified or confirmed by Mr. 

 Kenneth J. Morton, to whom I am greatly indebted for much 

 generous assistance with this and other groups of Neuropteroid 

 insects. 



SiALiDiE (Alder-flies). 



Sialis lutaria, Linn. — By rivers, canals, and ponds everywhere. 



S. fuliginosa, Pict. — Eaton, near Eetford, May 29th, 1901. 



Eaphidiid^ (Snake-flies). 

 Baphidia notata, Fab. — Epperstone Park, May 12th and June 



