118 



APRIL. 



Clivina fossor is, in the early spring and sum- 

 mer months, extremely abundant in the vale of 

 Trent, and subject to great variation in colour 

 from the common piceus, to brunneous and 

 light testaceous. I mention this because the 

 light varieties are generally considered scarce, 

 or might be confounded with collaris ; but on 

 examination, they are readily distinguished by 



