194 
BRITISH BEETLES. 
the trunks of trees during the day, and is usually 
taken when flying heavily towards evening. 
Its larva is a broad, flattish, white grub, narrowed 
behind, with its head bearing very strong small trian- 
gular mandibles, and capable of being considerably 
retracted into the first segment, which is short, the 
second beiDg large and flattened : it has six minute 
legs in front, and also fleshy protuberances on the 
under side. It feeds in solid timber, and forms a 
large cocoon with pieces of gnawed wood, &c., taking 
the precaution (so very prevalent in timber-feediug 
insects), when nearly full grown, of boring its gallery 
towards the outer surface of the tree in which it lives, 
so that the perfect insect has but little work to do in 
making its escape. 
The Cekambyciu.® are divided into four tribes: — the 
Cerambycina, Callidiina, Clytina, and Obriina ; and 
are distinguished by their slightly deflexed head, 
unarmed tibiae, laterally dilated thorax, and sub- 
globose anterior coxae, and by having their antennae 
(which are generally very long, and never serrated) 
inserted at some distance from the mandibles. 
The Cerambycina (which have the head exserted, the 
antennae with the second joint transverse, the thorax 
armed with a lateral spine, the femora slender, almost 
cylindrical, and the shoulders of the elytra rectangular) 
are here represented by Aromia moscliata, often found 
in the London district on old willows (which are much 
damaged by its larvao), and generally known as the 
“ Musk-beetle,” on account of its sweet smell; which 
is, however, much more like otto of roses than musk. 
This scent is so strong as to be readily noticed at 
some distance from trees frequented by the insects; 
