THE CANADIAN ENTOMOLOGIST 



123 



The following table shows the length of the egg stage as observed 

 Table 1. — Length of Egg Stage. 



Larva. — The larva resembles the common white grubs. No definite char- 

 acters separate it from Lachnosterna grubs. There is, as in Lachnosterna, a 

 triangular patch of hairs on the last ventral segment with a median double row 

 of mesad pointing spines. The head is light brown or tan. 



Before hatching the grub can be seen within the egg. When freshly hatched 

 the head is white, except the tip of the mandible, but soon the whole head dark- 

 ens to its characteristic color. Newly hatched larvae are about 4 mm. long. As 

 before stated, hatching occurs early in July, and the winter is passed in this 

 stage. The following spring the prepupal condition is reached and pupation 

 soon occurs. The length of the larval and prepupal stages of four individuals 

 raised to maturity are shown in table 2. 



Table ii. — Length of Larvae Stage. 



E.ar^ Became 



Hatched Preputa 



July 7, '19 May 26, '20 

 July 10. '19 Maj'2^, '20 

 July 10. '19 May 31, '20 

 July 13. '19 May 25, '20 



Average 



Maximum 



Minimum 



