472 



was 14 and the greatest number of adults were produecd from 

 beans developing 4 and 5 adnlts in the first lot and from 

 those developing 5 adnlts in the second. The adnlts emerge 

 from the pod by cutting circular openings similar to those 

 made in emerging from the bean. 



The Dolichos weevil apparentlv breeds commonly here only 

 in Dolichos lahlab, though I have found the eggs on the pods 

 of the lima bean (Phaseolus lunatus) and have bred one dimin- 

 utive individual from a lima bean apparently naturally in- 

 fested. In captivity I have succeeded in breeding it from the 

 pigeon pea, cowpea, soy bean, chick pea, adsuki bean, broad 

 bean, mung bean and common pea. Repeated experiments 

 failed to induce it to l)reed in common beans. 



The Dolichos weevil is rather short-lived in confinement 

 and I doubt if it will succeed in maintaining itself in storage 

 though I have bred it from old cowpeas and Dolichos beans in 

 which the cotyledons were very tough and hard. My breedings 

 gave from 40 to .55 days as the period required for its 

 development from egg to adult during the cooler part of the 

 year in Honolulu. 



Doliclios lahlaJ), locally known as the papapa bean, is used 

 to some extent as food, but the weevil would seriously interfere 

 with its further use since the weevil is generally distributed 

 and abundant. Dr. H. L. Lyon, who has been studying the va- 

 rieties of Dolichos, tells me that it has often prevented his se- 

 curing satisfactory seed. In examining some of his samples of 

 seeds grown by him it is interesting to note that all varieties 

 grown except one known as Dolichos sudanensis were attacked 

 by this weevil. What were said to be samples of the original 

 stocks of seed secured from a seed company in Philadelphia 

 and from a German firm were infested, apparently having been 

 infested at the time they were brought into the Islands. These 

 shipments were long subsequent to the establishment of the 

 weevil as shown by Mr. Swezey's breeding it in 1908. 



The species appears closely related to Bmchus quadriniacu- 



