128 
MACDOUGALL—ON THE LIFE-HISTORY 
Name of the Enemy 
: of the Tree in 
Family. Name = Carnivorous | hose Tunnels the Tree Infested. 
tee Carnivorous Beetle was| 
found. 
‘Rhizophagus | Hylesinus and Bos- | Various conifers 
depressus trichus species 
Rhizophagus} Hylesinus micans Spruce 
ee grandis 
WNitidulidee 4 
Rhizophagus dispar | Pissodes pice Silver fir 
Ips ferrugineus Scots pine 
| Ips quadripustulatus 
Nemosomaelongatum| Hylesinus vittatus Elm 
Trogositidz Lymexylon dermes- | Beech; some- 
. toides times birch, 
alder, ash— 
rarely _ silver 
Tomicus domesticus | Birch, alder, 
Tomicus Saxesenii Oak, beech, birch, | 
ime, poplar, 
fruit trees, 
pine, spruce 
Hylesinus olez Olive 
Tomicus bicolor Beech ; rarely 
hornbeam and 
walnut 
SS Eien mono- | Oak 
Colydiidee 4 Oxyleemus variolosus| hus 
Colydiumelongatum | Platypus cylindrus Oak 
(Lemophlceus ferru- | Tomicus —_micro- | Pine, _spruce, 
gineus graphus silver fir 
ee Lzmophlceus ater Hylesi1 hodo- | S 
d Pp yiesinus rhodo pruce 
Cucujidze 4 Linen 
coro clema-| Tomicus bispinus —_| Clematis vitalba 
K es 
The widely-distributed family Nitidulide includes very 
diverse forms, and the species also vary in habit. 
Some are 
