CONTENTS. 7 



Department Bulletin No. 965. — Control of the Argentine Ant in Cali- 

 fornia Citrus Orchards: Page. 



Introduction 1 



Relation of the ant to the citrus industry 2 



Other relations 4 



Distribution 4 



Characteristics and habits 6 



Control 9 



r.aiKling 9 



Trap nestino- 18 



Poison sirui)s 20 



Factors influencin£^ control 34 



( "ontrol on marginal trees 37 



( 'lean culture 38 



Control on house lots or about buildings 38 



ComprehensiA'e demonstration of control 40 



Summary 41 



Department Bulletin No. 966. — The European Horse-radish Webworm: 



Introduction 1 



Description 2 



Distribution 4 



Notes on occmTence and habits 5 



History in North America 8 



Food plants 8 



Natural enemies 9 



Control 9 



Summary 9 



Literature cited 10 



Department Bulletin No. 967. — -Results of Work on Blister Beetles in 

 Kansas: 



Introduction 1 



Economic importance 2 



Injury to crops 3 



Food plants . . .• '. 3 



Classitication of species studied 4 



Description of Mcloc sp 4 



Description of Coilharis reticulala Say 5 



Key to species of Epicauta and Macrobasis collected at Garden City, 



Kans 5 



Character of additional data on Macrobasis and Epicauta 7 



Results of work on ]\Iacrobasis 7 



Descriptive 7 



Mncrobdsis immaculata Say 7 



Macrobasis unicolor Kirby 9 



Life history and habits 10 



Macrobasis miinaculala Sa>' 10 



Macrobasis unicolor Kirby 12 



Results of work on Epicauta 12 



Descriptive 12 



Epicauta maculafa Say 12 



Epicaula cincrca Yoxsi 13 



, Epicauta sericans Lee 14 



Epicaula /'<nnsiflrnnica De G 15 



Life liistory and habits 15 



Epicauta aiaculafa Say 15 



Epicauta cincrca Forst 16 



Epicauta sericans Lee 17 



Epicauta rcnnsi/lvanica De G 17 



Irregular development 17 



Control measures 21 



Effect of arsenicals, contact insecticides, and repellents 21 



Control measures in infested fields 23 



Dri\-ing 25 



Summary of control measures 25 



