20 



formation result. The pupa is formed in a tough cocoon, attached to 

 or enclosed in the stem. The beetle seems at times to remain in the 

 cocoon for an indefinite period before emerging, particularly in the 

 case of the later broods towards the end of the breeding season. In 

 the height of summer the period of development up to the emergence 

 of the adult may be as short as fifty days, but is very variable even in 

 a given brood. 



Breeding appears to be restricted to a short period of the year. The 

 insect hibernates as an adult, buried in the ground. Egg-laying has 

 not been observed earlier than late November. Adults from these eggs 

 appear from the middle of January onwards and begin laying in a few 

 days. There are probably only two generations a year, while some of 

 the beetles appearing in January live on till ' next spring before 

 ovipositing. 



A plant may apparently carry one grub without actually dying, but 

 its growth and production are seriously interfered with. Many plants 

 are killed outright, and others become yellow and drop their leaves, 

 dying more slowly. Damage is sometimes overwhelming in a few 

 rows in gardens, but the weevil's capacit}^ for increase does not seem 

 sufficient to make it a serious field pest. 



As a remedial measure all beans attacked should, be pulled up and 

 burnt as soon as their period of usefulness is over, especially during the 

 earlier part of the season. 



No parasites have been bred from the grubs, but observations in 

 the .field have indicated considerable destruction by predaceous 

 enemies, which eat into the cocoons and devour the pupae and resting 

 adults, and probably also the larvae. The driver ant, Dorylits helvohis, 

 appears to be the chief enemy in this respect. 



SwEZEY (0, H.). Termites or White Ants in Sugar Cane. — Hawaiian 

 Planters' Record, Honolulu, xxiii, no. 4, October 1920, p. 218. 



An instance of Coptotermes intrudens, Oshima, attacking sugar-cane 

 is here recorded. In a single stool of cane growing in a garden, a few 

 of the stalks were hollowed out by the termites, which had worked into 

 the stool from below ground and on up into the stalks. They had 

 apparently come from a badly infested fence near by. 



Only once before has a similar attack by termites been recorded in 

 Hawaii, five stools in a field having been attacked by C. intrudens in 

 1917. In both cases the attacks took place in July. An instance is 

 also given of sugar-cane that has never been attacked though situated 

 within a few feet of a heavily infested fence. 



In March 1920 this same termite was found in maize, well grown stalks 

 of which had been entirely eaten out. 



Conner (S. D.). Aphids and Ants on Fruit Trees. — Proc. Indiana Acad. 

 Sci., Indianapolis, 1918, pp. 245-246. 



Trees treated with sticky bands for the prevention of infestation by 

 ants were found to be equally free from Aphids, Although Aphids 

 can fly, they apparently depend chiefly on ants for transmission as well 

 as protection from natural enemies. The efficacy of this treatment, 

 tested in 1917, was proved by a subsequent trial the following year. 



