APPENDIX. 63 



For fumigating stores it is best used in a large air-tight tin, 

 into which the goods are placed, and then pour the bi-sulphide 

 into a saucer placed upon the goods in the proportion of one 

 pound (i Ib.) to every thousand (1,000) cubic feet of space. The 

 liquid should be poured out quickly in order not to inhale the 

 fumes, there is no danger in inhaling a small quantity, and the 

 bin closed and kept shut for at least five hours, after which time 

 it should be well ventilated as also the fumigated goods. 



APPENDIX B. 



For the benefit of those possessing no special knowledge of 

 Entomology, it may be well to point out, that with a few excep- 

 tions, all insects are hatched from eggs. From the eggs the 

 larvae or caterpillars hatch out, and alter a time these change 

 into pupae or chrysalides, each ultimately developing into an 

 imago. 



The Eggs. These are exceedingly variable in shape, size, 

 and colour. They may be laid singly or in groups. Sometimes 

 they are protected by a gummy secretion, whilst others are fast- 

 ened by a short thread. The food of the young in nearly all cases 

 determines the place where the eggs are deposited, such for 

 instance as on leaves, close to or in roots, in blossom buds, 

 beneath the bark of trees, on cattle, meat or decaying animal or 

 vegetable matter. The number of eggs laid by a single insect 

 may be very few or many thousands, fifty to a hundred, however, 

 may be taken as an average. The period of hatching, generally 

 speaking, is not of long duration, though there are cases where they 

 remain unhatched for a considerable length of time. 



The Larva. In a few cases this is produced alive, but usually 

 it is hatched from an egg. The larvae of Butterflies, Moths, and 

 Sawflies are commonly spoken of as caterpillars, those of Beetles 

 as grubs, while those of Flies are known as maggots. 



If a larva possesses legs, the first three segments behind the 

 head each carry a pair, which are jointed and known as thoracic 

 or true legs. Legs may also be present on the posterior seg- 

 ments, but these are never jointed ; they are known as pseudo- 

 pods or prolegs. 



It is often very difficult to say exactly to what particular 

 order a larva belongs, but speaking in general terms we may say 

 that the larvae of Butterflies and Moths exhibit the following 

 characters : a well-defined head provided with biting jaws, a 

 pair of jointed limbs on each of the first three segments behind 

 the head, a pair of pseudopods on the sixth, seventh, eighth and 

 ninth segments, and sometimes a pair of larger anal feet on the 

 twelfth segment, making a total of sixteen. The"Looper" 

 caterpillars have pseudopods on the ninth and twelfth segments 



