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When dealing with any particular structure, such as the antennae, 

 eggs, eyes, etc., of insects, the entomologist should be careful to 

 photograph them respectively at the same magnification, so that for 

 purposes of comparison his results will have a scientific value. 



It is essential to entomologists, and to workers in any other branches 

 of science, to proceed with and record observations systematically. In 

 this connection I would draw attention to the value attached to a series 

 of photographs representing the life-history of any particular insect. 

 There are a vast number of these whose life-histories and structure 

 have never been accurately studied, and to the earnest worker abund- 

 ant material is afforded by the many variations which insects present 

 during their development from the ova to the adult state. In nearly 

 every case the details of metamorphosis are different. Apart from 

 the interest which the casual observer will derive from such a line of 

 study, the specialist will be in a position to make a permanent record 

 of his observations. 



