OF NORTHUMBERLAND AND DURHAM. 233 



All the T. cenea were fully mature, and I think had 

 passed their earlier stages between the fungi and the 

 surface of the tree beneath the bark. I have re- 

 corded T. cB/iea as common under holly bark in the 

 Derwent Valley (Ento. Mo. Mag., 1904, p. 108), 

 where it has occurred to me in autumn, winter, and 

 spring, but rarely in summer, and never in such 

 numbers as in this instance ; so in these circum- 

 stances I think (though I have no definite proof) 

 that it must hibernate or spend the cooler months 

 under the bark, and in the summer search for 

 " pastures new." 



Even beetles must have their summer holidays ! 

 (Ento. Mo. Mag., 1904, p. 210). 

 ** Triplax bicolor^ Gyll. {sciitellaris, Charp.). 



A species new to Great Britain, and mistaken for 

 T. rtissica (Ento. Mo. Mag., 1904, p. 210, and Ento. 

 Record, 1904, p. 260-2). 



See description at a later page of this volume and 

 also above note. 

 1678. Cerylon histeroides, F. 



Though by no means common, the commonest of 

 the British species of Cerylon. 



Recorded by Mr. Bold, " Beneath bark, Ravens- 

 worth, and near Gilsland. Rare" (N. H. Trans., 

 p. 59, 187 1). I have met with this species only 

 once, from under the bark of a felled cherry tree 

 in Gibside, June 29th, 1904 (Ento. Rec, 1904, 

 p. 260-2). 



Gibside, beneath bark of holly, etc. March and 

 April, 1905. 

 *i679. C. fagi, Bris. 



Very rare. On May 13th, 1904, I came across a 

 Cerylon answering to C. fagi, Brisout, from a rotten 

 tree lying in a wood near Winlaton Mill. 



Liodes humeralis, Kug., Agathidhim nigripenne, 

 Kug., A. rofundahan, Gyll., Scaphisoma agaricimwi, 



