4 DEPARTMENT OF AGRICULTURE BULS. 226-250. 



Department Bulletin No. 231. — Recent Studies of the Mexican Cotton 



Boll Weevil: Page. 



Introduction 1 



Distribution 2 



Food plants 3 



Characteristics of the adult 4 



Longevity of adult weevils 6 



Sex of adults 10 



Reproduction 10 



Development 27 



Hibernation 31 



Natural control 31 



Behavior of Louisiana weevils at Victoria 32 



Development of thurberia thespesioides 33 



Examination of thurberia bolls 33 



Department Bulletin No. 232.- — The Production of Lumber in 1913: 



Introduction 1 



Yellow pine 9 



Oak 11 



White pine 12 



Hemlock 13 



Western pine 14 



Cypress 14 



Spruce 15 



Maple 15 



Red gum 16 



Yellow poplar 16 



Redwood 17 



Chestnut 17 



Larch 18 



Birch 18 



Beech 19 



Cedar 19 



Basswood 20 



Elm 21 



Cottonwood 22 



Ash 23 



Hickory 23 



Sugar pine 24 



Tupelo 24 



Balsam fir 25 



White fir 25 



Walnut 26 



Sycamore 26 



Lodgepole pine 27 



Minor species 27 



Detailed summary 29 



Opportunities for purchasing national forest timber Cover, page 4 



Department Bulletin No. 233. — Relation of the Arizona Weld Cotton 

 Weevil to Cotton Planting in the Arid West: 



Introduction 1 



History of the weevil 1 



Distribution 3 



The thurberia plant 3 



Life history of the weevil on cotton in the South 5 



Life history of the weevil on thurberia 5 



Description of stages of the weevil 



Nature of damage to cotton 7 



Food preferences of the Arizona weevils 8 



The transfer to cotton 8 



Prospects 10 



Summary 12 



Department Bulletin No. 234. — Utilization and Management of Lodge- 

 pole Pine in the Rocky Mountains: 



Ownership and supply 



Characteristics of the wood 3 



Uses 4 



