405 



While the observations have not been carried ont to en- 

 able us to state with exactness the time required for the de- 

 velopment of Bruchus prosopis in the green pods, the indi- 

 cations are that the period is about four to six weeks fn»iii 

 oviposition to the emergence of the adult upon the pod. In 

 any case the emergence from the pod takes place soon after 

 the ripe pod falls to the ground or even before, some even 

 while the pod is still green. In any case all the injurv froui 

 the initial attack is completed by the beginning of storage 

 while much of the emergence is completed soon after. 



In contrast to this short period for development, the <inly 

 record of timed breeding from rii)e pods yet secured gives a 

 period of 130 days for develo])im'ut during the eoolei- months 

 of the year here. 



Bruchus sallaei Sharp. 



This species has now spread from the originally discover- 

 ed center of infestation upon Punchbowl crater to both 

 extremities of the island of Oahu at Kaena and Makapuu 

 Points. 



Observations previously made indicated that this species 

 could breed at the expense of the seeds of Prosopis juUflora. 

 In November, 1919, examination of weevils bred by Mr. 

 Pemberton from pods of algaroba gathered at Waikiki showed 

 that 23% belonged to this species and more recent breedings 

 show that this species frequently outnumbers B. prosopis in 

 the pods of Prosopis. 



It is exceedingly curious that the eggs of this species now 

 seem to be much more frequently laid in compact masses of 

 2-7, or more eggs, than previously observed. In 191S, duly 

 an indication of this was observed but now the prevailing 

 method of oviposition upon the pods is in masses. The eggs 

 laid upon the seeds of Acacia farnesiana within the pods 

 seem to be always laid scattered. Ordinarily the eggs of this 

 species are not laid upon the green pods of Acacia farnesiana. 

 but Mr. Swezey has shown me a few laid upon green but 



