Dorothy J. Jackson *277 



Sexual differences in the legs. A very slight difference occurs between 

 the legs of the male and female. In the male there is a small pointed 

 prominence at the apex of the tibiae of all the legs on the inner side, but 

 it is most conspicuous on the anterior tibiae. In the female though a 

 slight prominence occurs on the same place it is much smaller on all the 

 legs than in the male. As in both sexes the apex of the tibia is much 

 obscured by long bristles this difference is difficult to ascertain in un- 

 cleared specimens and I merely mention it as the presence of a "hook" 

 on the anterior tibiae of the male is given by Fowler(i5) as a character 

 for distinguishing the male of this species. 



A B 



Del. D. ./. Jackson' 



Fig. 2. Eggs of Sitones lineatus L. x 91. 



A = newly laid egg. 



B =egg a few days later. 



The Egg. (Fig. 2.) 



The eggs viewed with a lens are smooth, but under a microscope 

 their surface is seen to be slightly roughened. In shape they are oblong 

 oval but they vary somewhat in shape as well as in size, some being 

 more spherical than others. The majority measure 0-36 mm. by 0-29 mm. 

 but they are sometimes as large as 0-37 mm. by 0-31 mm. or as small 

 as 0-32 mm. by 0-3 mm. The first eggs laid by the newly mature female 

 are of peculiar shape, being extremely elongated and pointed at both 

 ends, measuring 0-46 mm. by 0-19 mm. When first laid the eggs are 

 yellowish white but they change in two or three days through grey to 

 black. 



The Larva. (Plate XVI.) 



The larva is legless, but the tenth segment forms a fleshy pro- 

 minence which is used in walking and is capable of being extended or 

 withdrawn. When full grown the larva measures about 6 J mm. Its 



