366 



THE CANADIAN ENTOMOLOGIST 



collecting at all, they are certainly worth presenting in a manner 

 likely to convince the reader, thereby obtaining the desired re- 

 sults. 



The scope of this paper is purely suggestive and the follow- 

 ing figures are of the simplest. If one starts prily to think of the 

 best way to present his facts, various graphic methods will sug- 

 gest themselves to him and by placing himself in the position of 

 the readers he is trying to reach, he can decide upon the best 

 method to use. Graphic methods are used by banking houses, 

 corporations, railroad companies, statisticians, engineers and 

 many others in business and professional occupations, and there 



coleoptera 

 lepidopte:ra 



MYMENOPTERA 

 DIPTERA 

 hOnOPTERA 

 hLJLROFTLKA 



3100 3p£cie"3 

 100 species 

 ZOOO spcces 



1700 5peciet> 

 500 species 

 4-00 species 



ORTHOPTERAii50spcc,cs 



ODONATA 1120 spec, es 



Fig. 29. — A comparison of New Jersey's Insect Orders., 



is no reason why all entomologists should not use them wherever 

 possible. 



Figure 29 is;a graphic comparison of the number of species of 

 insects in some of the orders in New Jersey. Figure 30 is a similar 

 comparison in which each order is represented by the sector of a 

 circle. The bar method as shown in figure 29 is by far the most 

 preferable. It is easier to read and the figures in round numbers 

 at the right hand ends of the bars give the reader a chance to test 

 the accuracy of the comparisons. All titles should be as full as 

 possible and in large enough type to be easily read. Figure 30 is 

 an example of the direct opposite of this. Many entomologists 

 simply number their figures and have an explanation of the plate 



