358 



ZOOLOGY. 



[Sect. XL 



Sec- 



can be observed to the assumption of the mature or parent 

 form. The eggs, usually of some bright colour, attached 

 beneath the tail of the female crab, lobster, or shrimp 

 should be examined for this purpose : the embryo if in 

 course of development may be readily seen by opening 

 the egg under a moderately magnifying power (see the 



note on Microscopes). Drawings of the different forms 

 or stages of the embryo should be made, if possible, and 

 the egg's nnd embryos preserved in spirit or solution in 

 small glass tubes. 



-1 



Insecta. 



Some specimens of all kinds of insects should be pre- 

 served for anatomical examination in spirit or the suhition 

 No. I. Many of the softer kinds of insects and spiders 

 can only be profitably so preserved. Care must be taken 

 that the softer kinds of insects are not put into the same 

 bottle with the harder kinds. Gauze nets must be used 

 for catching the Lepidoptera (butterflies and moths) on 

 the wing, and a fine muslin net, like a landing-net, for 

 the water insects. Many species may be taken by 

 preading a cloak, or placing an open umbrella reversed 



under trees or bushes, and shaking or beating the latter. 



Caterpillars should be carefully placed in a perforated 



box with the leaves of the plants on which they are found 



feeding : they will often undergo their metamorphosis in 



this captivity, and no lepidoptera are more ncrfect than 

 th 



so thus hred, as it is termed, if carefully watched. 

 The perfect insect should be accompanied, if possible, by 

 its larva (caterpillar) and jmpa (cl 



rysalis or cocoon), 

 together with a specimen of the plant on which it is found 

 feeding. The latter should be kept in an herbarium set 



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