THE LITTLE BROWN MAY-BEETLE, Phi/talUS insalariti X. SP. 



* The columns of figures in tlie above table (wliicli were all obtained by actual observa- 

 tion or actual measurement), numbered from left to right, may be explained as follows: 



(1) Maximum duration in days of the immature stages, the totals being the maximum 

 egg-to-adult period for each species, in days. 



(2) Minimum duration in days of immature stages, etc. 



(3) Average duration in days of immature stages, etc. 



(4) Numbers of eggs, grubs, or pupae, averaged to obtain the figures of the first three 

 columns. 



(5) Average length in millimeters of each of the immature stages, taken from a number 

 of measurements made with sliding calipers. 



(6) Average breadth in millimeters of egg and pupa of the various species, from 

 measurements with sliding calipers. 



(7) Average breadth in millimeters of the head of grub in each mstar of the five 

 species, from measurements with sliding calipers. 



169 



