NOTES ON NEW AND RARE LOCAL BEETLES. 417 



the surface of the trunks and larger limbs of trees, appearing 

 to prefer fallen timber. There are three British species, 

 Trypodendron domestiaim^ L., T. qnet'cus, Eich., and T. 

 lineatum of Olivier. The two first mentioned affect the dead 

 wood of beech, birch, oak, and other trees ; but whereas 

 domestiatm is widely distributed, though local, in Great Britain, 

 being rare in Ireland [Westport, Co. Mayo (J. J. Walker)] 

 and Scotland, quercus is apparently confined to Sherwood 

 Forest, where it has been taken in numbers by the late Messrs. 

 Matthews and Blatch, Canon Fowler, and other coleopterists. 

 The third, T. lineatum, 01., affects fir logs, and is regarded as 

 a very local Scotch species, where it occurs in the districts 

 around Braemar and Rannoch ; it has, however, been taken 

 recently in Cumberland (F. H. Day) and Northumberland 

 (Gillanders), and in his "Further Notes on Arboreal Insects" 

 (Ann. Rep. and Trans. Manchester Microscopical Society, 

 1904, pp. 58-66, pi. ii. and iii.), our friend Mr. Gillanders 

 informs us that though lineahim will attack spruce timber 

 lying on the ground, it prefers the standing stumps of broken 

 trees. In the field T. domesticuffi is the only species known to 

 the writer. It bores a gallery into the interior, and at right 

 angles to the surface of some fallen timber, this gallery (which 

 we take to be chiefly if not wholly the work of the female) 

 varying in depth according to the circumference, and no doubt 

 the solidity of the wood selected ; for instance the old borings 

 in the trunk of a fallen beech were of greater depth than those 

 in a smaller branch of the same tree. The presence of 

 domesticum and other wood-borers of like habits may be easily 

 recognised by the heap of white sawdust-Hke frass at the 

 entrance of the gallery. These galleries rarely exceed forty to fifty 

 millemetres in depth, and at a short distance from the entrance 

 the ? commences to lay her eggs ; soon hatching, the larvae, by 

 eating the timber, bore themselves tunnels at right angles to 

 the parent gallery from perhaps six to ten millemetres in 

 length, and thus eating, each grub invariably follows the grain 

 of the timber, in other words boring upwards or downwards in 

 the longitudinal direction of the stem. Each larva, then, bores 



