220 APPENDIX 



Look at the specimen carefully, noting its external fea- 

 tures. 



Read the first line A (see page 59). 



If your specimen agrees with this exactly, then its family 

 is found somewhere under A, the subdivisions of which are 

 set in farther to the right on the page. 



If your specimen does not agree with A, then, omitting 

 all the subdivisions of A, go to AA on page 64, and com- 

 pare that description with your animal. If AA describes 

 the specimen correctly, then the family is under this group. 



Suppose the specimen belongs under A. 



Read B. If this is true, the proper family belongs under 

 this heading. 



Read C. If this is true of your specimen in every particu- 

 lar, it belongs to the group Phytophaga, which contains 

 several families. 



Read D. If this is correct the specimen belongs to the 

 family Spondylidae; if it is not true, look at DD, which is 

 coordinate with D and includes the families described in 

 E and EE. 



Suppose your specimen does not belong under C, then 

 read CC at the bottom of the page. If this be true, trace 

 to the proper families in the manner above described. 



In like manner, if B is not true of your specimen, turn to 

 BB on page 63. If this description be true, read C, D and 

 E to find one that is true. If you find nothing there which 

 fits your specimen, turn to CC on page 64 and follow 

 these descriptions in the same way. 



In the tables where figures are used the same general 

 plan may be followed. Read the descriptions until you find 

 one that coincides exactly with the specimen in your hand. 



