. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 30 Larvae pass the winter at varying depths, according to the soil and the degree of its hardness. In a large jar, full of moderatel}^ moist sand, in which chestnut "worms" have been placed by the writer, the larvse have penetrated to a depth of 9^ inches in a possible 10 inches. They make cells considerably larger than themselves, so that they have ample room to move about. The lai'ger cells of iJ7'ohoscideus are half an inch long and about one-sixth of an inch in height. As a rule, the larvae rest on
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 30 Larvae pass the winter at varying depths, according to the soil and the degree of its hardness. In a large jar, full of moderatel}^ moist sand, in which chestnut "worms" have been placed by the writer, the larvse have penetrated to a depth of 9^ inches in a possible 10 inches. They make cells considerably larger than themselves, so that they have ample room to move about. The lai'ger cells of iJ7'ohoscideus are half an inch long and about one-sixth of an inch in height. As a rule, the larvae rest on their backs in a moderately curved position. Ordi- narily they remain in perfect (juietude even in a moderately warm temperature, but respond to stimulus. FOOD HABITS OF SPECIES OF NUT WEEVILS. Of the eight species of nut weevils of the genus Balaninus known to inhabit America noi'th of Mexico, the food habits are approxi- mately known, largely through the investigations of Dr. John Hamilton (1. c.). The following summary is given of the observed host plants: Balaninus rectus Say, the common chestnut weevil, is nearly confined to chestnuts and chinquajiins, having Iteen reared only from these nuts, with the exception of a single lot (identified as this species) which l)red from acorns from Arizona. It appears to be the only species affecting chestnuts in the extreme northern jiortion of the United States where Balaninus occurs. Bdlaninus proboscideus Fab. {carya- trypes Boh.), the chinquapin weevil, depredates chiefly in chestnuts and is (}uite as great a \>tisi as the preceding in some regions. It also breeds in chinquapin. Baldninns quercus Horn affects in about equal numbers acorns of differ- ent species of biennial fruiting oaks, not being found in annuals (white and chestnut oaks). Mr. Fdk. Blanchard has reared this species from acorns of Quercus rubra, and the writer obtained many specimens from the same or a closely related species. Balaninus nasicus Say prefers the a
Size: 1677px × 1489px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectentomology, booksubjectinsects, booky
