96 PINE. 



The figure of borings of T. lineatum in Spruce wood, copied from 

 Mr. Fisher's paper, given at p. 92, conveys an excellent idea of the 

 galleries, as seen in a vertical section of Spruce wood ; and accom- 

 panying (p. 230, same paper) will be found a figure of a horizontal 

 section of Spruce wood showing the entrance galleries and branching 

 brood galleries, of which I have endeavoured to convey the appearance 

 above by comparison with letters. 



The mother-galleries of T. domesticiim (the species infesting de- 

 ciduous-leaved trees) are stated not to branch (as a rule), and in the 

 good supply of specimens of borings of this kind into Oak timber, with 

 which I was favoured from Chatsworth, I found that the mother- 

 gallery, with the little upright larval cells gnawed out above and 

 below, would be perfectly well represented by the figure of lineatum at 

 heading (p. 92). 



The larvae are observable in May, and beetles are to be found about 

 the middle of July or earlier, ready to give rise to a second brood. 

 The specnnens of T. lineatum (in imago state) were sent me on 

 July 5th, those of T. domesticum on June 28th, and in each case pupte, 

 or larvfe just on the point of turning to pupae, were sent accompanying, 

 showing that the summer brood was then developing. It is considered 

 on the Continent that there may be three broods in the course of the 

 year, and that, failing other shelter, some of the last brood hybernate 

 in moss at the root of trees. 



Trypodendron domesticum, Linn., the Deciduoiis-\e&vedL Tree-borer. — 

 The main distinctions of the beetle, as abridged from Eichhoff's de- 

 scription, are that it is somewhat elongate-cylindrical, black, with 

 straw-coloured antennae, feet, and wing-cases, the latter with darker 

 suture, edge, and extremity; finely punctate-striate, and furrowed on 

 both sides of the suture at the apex. There are occasional difi"erences 

 in detail of colour sufficiently marked as to be classed as four varieties, 

 but requiring with such small beetles magnifying powers to ascertain 

 them exactly, excepting perhaps in the case of the variety of which 

 the whole of the wing-cases and the legs are of a clear (or pale) yellow. 



The life-history of this species appears to be very similar to that 

 of T. lineatum, excepting in the point of it infesting the timber of 

 deciduous (or, as they are termed, broad-leaved) trees, as Oak, Beech, 

 Birch, and Lime; not that of Conifers, or "needle-leaved" trees. 

 Also the mother-galleries do not appear to be always branched. 



This species is recorded as to have been noticed even as early as 

 February 20th in great numbers in a warm spring ; but in this case it 

 is noticed the " swarm," so to call it, would retire again, without 

 carrying out infestation, into crevices in bark, or under moss or leaves, 

 where the observer had often found the beetles during winter. Com- 

 monly they are stated to come out first in March, or, in a late spring. 



