198 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 6 



studied on the grounds of Mr. H. L. Champlain at Lyme. Most of 

 the field work was done by my assistant Mr. H. B. Kirk. 



In nearly all of the references to the walnut weevil in a somewhat 

 scanty literature, this insect is said to breed in the nuts, but in Connec- 

 ticut the larvae do great damage by tunneling in the new shoots. In 

 most cases infested trees produce little fruit as the shoots soon wither 

 and die. 



There is but one generation each year and the overwintering adults 

 appear the latter part of May and feed upon the stems and leaf-veins. 

 About the last week in May the females begin to lay eggs in the stems 

 in irregular crescent-chaped punctures under flaps, like those of the 

 plum curculio. The egg-laying period continues until the first of 

 August, and after the nuts have formed some eggs are laid in them. 

 The eggs require from six to twelve days for hatching, depending 

 probably upon the weather. The larvae tunnel in the stems of the 

 shoots usually working upward, though going in both directions, and 

 the frass is thrown out laterally through the egg punctures. From 

 four to six weeks are necessary for larval development which ceases in 

 the stems about September 1, and larvae hatching from eggs laid after 

 about July 20 do not mature. In the fruit the larvae feed in the kernels 

 but return to the shucks to finish their development. When mature, 

 they go an inch into the ground and pupate about ten days later. 

 The adult beetles emerge from sixteen to twenty days after pupating, 

 fly to the trees and eat holes at the base of the leaf petioles. 



In Connecticut the species of walnuts (Juglans) are attacked and 

 injured in the following order, those first named being the most dam- 

 aged: cordiformis, sieholdiana, cinerea, regia, mandshurica, nigra. 



Our limited tests indicate that this insect may be controlled by 

 spraying with lead arsenate in the usual proportions. Probably two 

 applications should be given, — the first about May 20 in Connecticut, 

 and directed against the under side of the leaves; and the second three 

 or four weeks later. 



The walnut weevil occurs in Quebec and Ontario, Canada, and 

 southward to the Gulf of Mexico, and at least as far west as Texas, 

 Kansas, Nebraska, Iowa and Wisconsin. 



The bud moth evidently prefers Juglans regia, but also attacks and 

 injures cinerea and nigra. There are three generations each season. 

 The eggs are laid singly at the base of the bud about the second week 

 in May for the first brood, July 1 for the second brood and August 15 

 for the third brood. They hatch in from six to ten days. Nearly 

 four weeks are required for the larvae to become mature, when they 

 pupate in the stems and adults emerge from two to three weeks later. 

 Sometimes the larva feeds upon the exterior and perhaps wholly on 



