Ixxxvil 
as to be considered rare, but which seems to be spreading. 
I. erosus was found in all stages, and I. sexdentatus as pupae 
and adults. The exhibitor said that J. erosus is very similar 
in appearance to I. laricis, with which it is closely allied, 
and with which it is likely to be confused, and gave some 
details of the characters—especially the teeth on the apical 
declivity of the elytra—by which they may be distinguished. 
He also read the following notes on this beetle :—‘ Ips erosus 
is a polygamous species and constructs very clearly defined 
many-armed (usually 3 or 4) galleries, diverging in a longitudi- 
nal direction from a small central nuptial chamber. The 
larval galleries are given off at either side, more or less at 
right angles. The galleries, both adult and larval, are chiefly 
in the bark, but slightly score the sap wood. 
“ Hichoff gives the distribution of I. erosus as 8S. Europe, 
the Mediterranean Coast, N. Africa, and the Landes, France, 
and its chief host-tree as Pinus maritima. The fact that it 
is a Mediterranean species makes it doubly interesting that 
it should have arrived in this country and succeeded in 
establishing itself successfully. In this connection Dr. Munro 
tells me of a record in the summer of 1920 of J. erosus being 
taken in the timber of P. maritima on a ship from the 
Mediterranean lying in Cardiff Harbour. It would seem 
therefore that some of these specimens must have since 
found their way up the Bristol Channel to the Forest of Dean, 
where they have taken quite successfully to Pinus sylvestris 
in place of the normal P. maritima. This beetle seems 
worthy therefore of the attention of foresters throughout 
the country as a possible additional pest of the already sorely 
afflicted Scots Pine.” 
Paper. 
The following paper was read :— 
Prof. C. ALEXANDER on “ New or little-known Exotic 
Tipulidae (Diptera).” 
Mr. A. T. J. JANSE gave a further account of methods of 
collecting when travelling in South Africa, illustrated with 
lantern slides. 
