92 PINE. 



final examination ranging from June 10th to October 6tli, and I 

 believe may be of great assistance to us in checking attack of this 

 destructive Gnat Midge. 



PINE. 



striped Pine-boring Beetle, Triipodmdronlmeatum,0\\v. = Xylotenis 

 Uneatus, Esch. Deciduous Tree-boring Beetle, Trypodendron 

 domesticiim, Linn. = Xylotenis domesticus, Esch. 



Trypodendon lineatum. — 1, male, 2, female, magnified; and line showing 

 natural length ; 3, borings in Spruce wood, natural size, showing mother-galleries 

 and larval and pupal cells. 



The two species of small wood-boring beetles mentioned above do 

 mischief by tunnelling for a short distance into the solid timber, respec- 

 tively of Conifers (in the case of Trypodendron lineatum) and of deciduous 

 trees, as Oak, Beech, and Birch, in the case of T. domesticum; and the 

 two species being very similar both in appearance and habits, it has 

 seemed most convenient to give here an account in detail of the Pine- 

 boring kind, with the addition of some notes of the distinguishing 

 points of domesticum, rather than place this under a separate heading. 



These attacks have not been previously reported to me, and I was 

 much indebted to Mr. James R. Robertson (Chatsworth Estate), 

 Edensor, Bakewell, Derbyshire, for being good enough to give me a 



