The Larvee of the Furniture Beetles. 235 
that he was unable to detect the abdominal spiracles. A. panicewnr is 
commonly found in stored goods, hay, biscuits, leather, etc. 
Ernobius mollis (Fig. 17). Length 738 mm. In #. mollis the head is 
somewhat darker than the preceding species. The spinules are stouter and 
more marked, and the spiracles being reddish-brown are more readily discerned. 
It is doubtful if #, mollis is at all common as a wood-borer. Its usual 
habitat is under the bark of coniferous paling posts and, according to Perris, 
in the pith canal of Scots pine twigs. 
Xestobvum tesselatwm. Length 9-12 mm. This is the largest of the 
Anobiid larve. It can readily be distinguished from the others by its 
damage, the flight holes being larger than the others. X. tesselatwmv attacks 
chiefly willow, oak and chestnut (Castanea vesca). It has caused enormous 
damage in the roof of Westminster Hall and the roof of Eltham Palace. In 
Westminster Hall one of the wall-posts, a huge beam 2 feet square and 
over 20 feet long has been reduced to a mere shell for a distance of 15 feet. 
Piilinus pectinicorms (Fig. 19). 7-8 mm long. This larva can be dis- 
tinguished from the others by the absence of the prescutal fold from the 
meta-thorax. The spinules, too, are more rounded in the preceding species, 
and occur as indicated in the table on the scutellar folds of the second, third 
and fourth abdominal segments, and on the hypo-pieural folds of all the 
abdominal segments except the first and last. The larva of Ptilinus seems 
to grind the wood into a finer dust than the other Anobiid larvie. 
Lyctus brunneus (Fig. 16) and Lyctus canaliculatus. Length 5-7 mm. 
The larvee of these two species differ only in the conformation of the epistome 
and clypeus. They differ, as stated, from the Anobiid larve in having the 
eighth abdominal spiracle remarkably enlarged. The head, too, being more 
deeply sunk in the pro-thorax appears smaller, only part of the frons, the 
clypeus, the labrum and mandibles being visible from above. The thoracic 
segments also are broader than the abdominal segments, a feature which is 
less noticeable in the Anobiid larve. 
The larve of Lyctus appear to occur in mach larger numbers than the 
Anobiid larve, if I may judge from the material in my possession which is 
reduced to an extremely fine powder by their boring. 
In conclusion, I wish to acknowledge my indebtedness to Dr Stewart 
MacDougall for his help and advice in all my work, and for the facilities he 
has given me for carrying it out. 
[EXPLANATION OF PLATES. 
