KELLOGG AND BELL 



Class C : 5 individuals have line a broken off and b con- 

 tinued on both elytra. 



Class D : 4 individuals have line a b separate and line a broken, 

 then continued below on both elytra. 



Class E : 6 individuals have line a rb continued to line a r and 

 line #* separate. 



Class F : 8 individuals have line a lb continued to line a 1 and 

 line a r separate. 



Class G : 7 individuals have line a rb separate, line a lb sepa- 

 rate and line a 1 broken, then continued below. 



Class H : 2 individuals have line a rb separate, line a r broken, 

 then continued below and line a lb separate. 



Class 1 : 3 individuals have line a r broken, and a rb continued 

 below, line a lb separate. 



Class J : 3 individuals have line a rb separate, line a r broken, 

 then continued below, line a lb continued to line a 1 . 



Class K : i individual has line a rb continued and a cross line 

 between a rb and a r , a lb separate. 



Class L : 2 individuals have line a b separate in both elytra. 



Class M : i individual has line a rb separate at first, line a r 

 broken, then continued below, its end connected with a line 

 below line a rb , and line a lb separate. 



Class N : 2 individuals have line a rb separate, line a lb con- 

 tinued below and connected by a cross line with a 1 



In the above series the classes have been established on the 

 basis of one pair of lines or grooves. An attempt was made to 

 separate the lot of individuals into classes based on the varia- 

 tion manifest in all the lines, with the result that no two indi- 

 viduals could be put into the same class. The variation in 

 these lines apparently exhausts the possibilities of combinations 

 of various conditions in the members of the line series. That 

 these minute, although to the trained and microscope-aided eye 

 distinct, variations can be of life and death selective pattern- 

 value (and any other function for these lines than the making 

 of pattern is not apparent) seems inconceivable. But in numer- 

 ous cases the presence or absence, and even the arrangement 

 and character of these fine elytral striae are characteristics 

 diagnostically used by systematists in their keys to genera of 



