MAY. 129 



The Gyrinus villosus, one of the rarest spe- 

 cies of this genus, inhabits the weedy margins 

 of streams. It is supposed by some to differ 

 from its congeners in not being gregarious, but 

 of this I have some doubts, as it has once in 

 this neighbourhood been taken abundantly, and 

 to all appearance is as fond of collecting toge- 

 ther as the natator, although not so common 

 or so frequently observed. The gentleman who 

 took them informs me that on turning over a 

 stone on the margin of the Trent, he observed 

 at least fifty specimens. 



The Onthophilus sulcatus and striatus are 

 both found in the vicinity of Nottingham ; the 

 former very rarely, but always near dead ani- 

 mals : the latter has been extremely abundant 

 this spring, (1830) in the usual haunts of the 

 Histeridae and Aphodiidae. 



Cetonia aurata — Rose May-Chaffer, or Brass 

 Beetle. This beautiful insect is not confined 

 to the south, some hundreds of specimens have 

 been captured in this county, and I have some 

 which were taken at Matlock. 



Scolytus Destructor. No one from a casual 

 survey of this little creature would deem it ca- 

 pable of such extensive devastation : its ravages 

 are confined to the Elm (Ulmus campestris), 

 the mid-bark of which it perforates in a circular 

 direction, in some instances completing the cir- 



K 



