230 



The Pea T/tn'j)s (Kakothrips robustus) 



plants, by the united stamens. This 'stamen-sheath' is very soft and 

 succulent and forms a very suitable environment for the soft egg and 

 also food for the freshly emerged larva. As many as 70 eggs have 

 been counted in a single stamen sheath of Viciafaber. 



Eggs are also laid, in smaller numbers, in the young developing pod, 

 chiefly at the apex, where it projects beyond the stamen-sheath, or at 

 the base where there is an entrance to the interior between, the two edges 

 of the sheath ; in the petals (keel, aleae, and rarely standard) ; in the 

 calyx ; and also in the young shoots and leaves in the terminal clusters. 

 This latter situation seems to be rare in this country; I have only 



Fig. 3. Eggs. Much enlarged. 



Fig. 4. Egg>s ill stamen -slieath of 

 Pea. Diagram. 



found a very few eggs there, but Trybom (1891)) mentions it as the 

 chief place of oviposition in the attack he observed in Sweden. 



About five to seven days after being laid two red eye-spots appear 

 at the head end of the egg. These, as pointed out by Warburton 

 (1908), make the egg quite conspicuous in the pale yellowish-green of 

 the stamen- sheath. Two or three days later (total 7-10 days) the 

 young larva emerges. 



Larval SxAti k.s. 



, First stage larva (Fig. 6). 



The young larva as it emerges from the egg has the antennae bent 

 down below the head, but either before or just after freeing itself from 

 the shell they take up the normal position. The larva is now about 



