Pests Infesting Buildings and Stored Produce. 235 
cut away aud destroyed. It is frequently a puzzle how it 
obtains access to hams apparently securely tied up in bags, but 
it is not necessary that there should be a hole large enough for 
the beetle to pass through. A very small aperture will admit 
the young grubs, and near such a hole the beetle will lay its 
eggs. All insects preying on stored goods seem to have this 
instinct. Blow-flies will drop their eggs through the wire 
gauze of the meat safe. I have seen an apparently hermetically 
sealed specimei\-box of wheat swarming with weevils and every 
grain destroyed. There was certainly no hole large enough to 
admit the weevil, but the glass top was not absolutely tight, and 
there was just room for the newly hatched larva? to crawl in. 
It is worth knowing that furs put away clean in newspaper 
wrappings are safe from the moth if the paper is free from 
holes and all the junctions are closed by gumming. The moth 
cannot pierce the paper, but it will take advantage of the 
slightest opening by which its caterpillars may enter. 
A few years ago the owners of flour mills thi’oughout the 
country were greatly troubled by the “ Mediterranean flour- 
moth,” Ephestia kuhniella, the grubs of which choked up the 
Fig. 2.— Ephestia krthniella. — A, Imago. B, Pupa. C, Pupse in situ. D, Larva. 
A and o, from nature ; B and D, after Eiley. 
bolting reels and elevators with their webs and rendered 
frequent closing down and cleaning out compulsory. So great 
was the nuisance in American and Canadian mills that, after 
a large expenditm-e on experimental treatment, the absolute 
eradication of the pest was almost despaired of, and the 
measures adopted against it took rather the form of automatic 
cleaning apparatus in the parts of the machinery liable to 
attack. I have not lately received any complaint of this 
