APPENDIX. 57 



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

 which the goods are placed, and then pour the bisulphide 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 fumi- 

 gated goods. 



APPENDIX B. 



For the benefit of those possessing no special knowledge of Ento- 

 mology, it may be well to point out that, with a few exceptions, all 

 insects are hatched from eggs. From the eggs, the larvae or cater- 

 pillars hatch out, and after a time these change into pupae or chrysa- 

 lides, 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, \vhilst others are fastened 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, 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 segments, but these 

 are never jointed ; they are known as pseudopods 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 ja\vs, 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, making a total of 

 sixteen. The u Looper " caterpillars have pseudopods on the ninth and 

 twelfth segments, making a total of ten. The caterpillars of a few 

 months are footless. 



