Life History of Tetropiwm gabrielt. 187 
a larch tree felled, by the kindness of a friend, and delivered to me 
in the early morning before Tetropiwm was on the move. The tree 
was a perfectly healthy one, and therefore was not likely to have 
been infected by the beetle before it was felled, and certainly not 
in transit. 
On an 8-ft. length of this I sleeved about 12 9 9 and a few 
¢ g early in June. I watched oviposition take place, and from this 
log eventually I took, in all, about 300 larve and imagines of the 
form with black femora exclusively, the only form known to me at 
the time. The larve mostly established themselves in their pupa- 
cells by the following October, and emerged the following May and 
June. 
HABiTat.—Larix ewropxa exclusively im my experrence 
in the wild state. Mulsant gives, as the habitat of the 
kindred species 7. luridwm, L.: “Pins, sapins, chéne ” 
(Hist. Nat. Col. de France, Longicornes, p. 115). It 
would be interesting to know if this species affects Larix. 
Mulsant’s silence as to Larix does not necessarily exclude 
this conifer from the food-plants of 7. /uridwm which he 
isenumerating. According to some modern classification of 
the Conifers: (Veitch, Man. Conif.), the tribe ABLETINA 
is divided into the sub-tribes :— 
(1) Pinex or Pines, including our familiar Scots Pine, etc. 
(2) Laricex, including the common European Larch, etc. 
(3) Sapinex or Firs, including the well-known Spruce 
Fir, ete. 
Probably Mulsant adopted the old classification which 
would include the Larches in Sapinex or “ Sapins.” 
Desirous to ascertain whether the larva of 7. gabrieli would feed 
in any other species of conifer than Larix ewropexa, and if so 
whether this would affect its coloration, in May 1906 I tested my 
beetles with a log of Pinus laricio, var. nigricans, Par.,* enclosing 
many ? @ on it with muslin. Contrary to expectation, the log 
subsequently produced a small number of larve. 
As Tetropiwm was at this time reported, though in error, to have 
occurred in Picea (Spruce Fir), I tested my beetles with a log of 
Picea excelsa, Link, fully expecting that they would not lay on it, 
or if they did, that the larvee would not live in it. The log 
subsequently produced a considerable number of larve. 
I was greatly surprised at this, for I have repeatedly found 
standing Larix inhabited by 7. gabrieli mingled with sickly, dying 
* So returned to me from the Royal Botanic Gardens, Kew, by 
the courtesy of the Director. 
