474 



Bruclius ckineusis in Hawaii. 



This species has been recorded elsewhere as breeding in 

 seeds of Pliaseolns radiatus (=articidatLis), Pliaseolus mun- 

 goy P. vulgaris, Cajanus itidiciis, Pisum sativum, Ervmn lens, 

 Cicer arietinimi, Doliclios lablab. Glycine hispida, Vigna chi- 

 nensis, and indefinitely from beans. It is common here, attack- 

 ing' pigeon peas in the field, the eggs being laid either npon the 

 nnbroken pod or if the pod has cracked open, as is common 

 when the ripe pods have remained for some time on the 

 bnshes, npon the peas. When the eggs have been laid upon the 

 pod and adults have bred out from the peas, thej mate and 

 oviposit before cutting their way out of the pod. Oviposition 

 takes place within a few hours after emergence and mating, 

 often within a few minutes. 



Experimentally I have been able to secure oviposition 

 upon 40 species of leguminous seeds and adults have been 

 bred from Pliaseolus articulatus, P. aureus,. Vigna chinensis, 

 Cajanus indicus. Glycine hispida, Cicer arietiiium, Vicia faba, 

 and Pisum sativum. Tlepeated experiments have failed to 

 secure breeding in common beans, lima beans, tepary beans. 



Bruclius chinensis has the shortest life cycle of any of the 

 species studied, adults often emerging during the winter sea- 

 son here in 29 days from oviposition. 



In storage B. chinensis does not seem to be able to hold its 

 own in competition with B. quadrimacidatus though why this 

 should be true is not apparent since in the only experiment 

 made when adsuki beans were placed with large numbers of 

 adults of both species B. chinensis emerged in large numbers 

 from the infested beans in due time. 



Bruclius quadrimaculatus. 



This species has been met with here on\j as a stored bean 

 and pea weevil, in no case so far has it been found depositing 

 its eggs upon the pods of its host-plants in the field. In one 

 instance the pods of pigeon peas were picked from the inime- 



