40 



The Scottish Naturalist. 



Pytho depressus, Linn. — Found hitherto only at Rannoch, 

 where it is common, (especially in the larva state), under 

 the bark of felled trees and stumps. The larva is figured 

 in Westwood's Introduction, and is no doubt carnivorous. 



Ernobius mollis, Linn. — This insect is tolerably common on 

 the Scotch fir, and is another of the species found also on 

 the maritime pine. Its larva is described by Perris, who 

 states that it lives at the expense of the tree, but attacks 

 only sickly and ailing individuals. 



E. nigrinus, Sturm. — Found by C. Turner, in Scotland, and 

 by Mr. Hislop on the fir near Forres. Ratzeburg has de- 

 scribed the larva. 



Blastophagus piniperda, Linn. ; Hylastes ater, Payk. \ 

 H. palliatus, Gyll. — These three species are all very 

 abundant, and most destructive to the tree. The larvae are 

 well known. 



Xyloterus lineatus, 01. — Till lately two species were con- 

 founded under this name, but it is now known that the 

 insect inhabiting the oak is a distinct species from the one 

 found on the pine. The latter appears to be the true linea- 

 tus, and has been found as yet only, I think, at Rannoch. 

 It bores deep cylindric holes into the wood of the felled 

 trees ; but I am unacquainted with the larva. 



Rhyncolus chloropus. — This also has yet only been found at 

 Rannoch. Its larva, I think, has not been described. From 

 my observations I am disposed to think that Ccrylon his- 

 tcroides lives at its expense. 



Anthonomus varians, Payk. — A few specimens have been 

 found on the fir, I believe, at Rannoch. Nothing is known 

 of its history. 



Magdalinus duplicatus, Germ. (?) — This species has been 

 found only by Mr. Hislop near Forres, and that very rarely. 

 It is very doubtful whether it is the true duplicatus \ and I 

 may here call attention to the fact, that a species of this 

 genus allied to duplicatus, Germ., has been recently de- 

 scribed by M. Desbrochers des Loges under the name of M. 

 Heydeni, and is stated by him to occur in Britain. The 

 larva of M. duplicatus is not known, but will closely resem- 

 ble that of Jlf. car/wiarius, described by Perris. 



