VI MISCELLANEOUS PAPERS. 



Page. 



The more important Aleyrodidse infesting economic plants, A. L. Quaintance. . 89 



Introduction 89 



Economic plants and the more important Aleyrodidas infesting them 89 



A record of results from roarings and dissections of Tachinid;*, Charles H. T. 



Toionsend 95 



Introduction 95 



Parexorista chelonise Rondani 97 



Blepharipa scutellata Robineau-Desvoidy 99 



Pales pavida Meigen 99 



Zenillia libatrix Panzer 100 



Probability of an extra maggot stage in leaf -ovipositing species 101 



The deposition of living maggots by tachinid flies 101 



Dexodes nigripes Fallen and Comp^Aliira concinnata Meigen 102 



Eupeleteria magnicornis Zetterstedt 103 



Zygobothria nidicola Townsend 105 



Zygohothria gilva Hartig and Carcelia gnava Meigen 105 



Parasetigena segregata Rondani 105 



Tachina and allies 106 



Tachina clisiocampie Townsend 106 



Japanese representatives of European species 107 



Importance of studying the uterine eggs of Tachinidse 107 



Reproductive capacity of Tachinidse 109 



The rearing of Tachinidae in confinement 110 



An improvement in the metho'd of colonizing Tachinidse Ill 



New alternate hosts for introduced tachinid flies 112 



Improvements in the outdoor rearing cage 113 



Bleaching the puparia of Tachinidaj 115 



Results from dissections of native Tachinidse 115 



Summary of reproductive habits now known in the Tachinidse 117 



Conclusion 118 



The orange thrips (Euthrips citri n. sp.) Dudley Moulton. . 119 



Introductory 119 



Distribution 119 



Extent and nature of injury 119 



Life history notes 120 



Soil conditions as affecting prevalence 120 



Remedies 121 



Enemy 121 



Description 121 



Biological studies on three species of Aphidida? John June Davis. . 123 



Introduction 123 



The corn root-aphis (Aphis viaidi-radicis Forbes) 123 



The corn leaf-aphis (Aphis maidis Fitch) 144 



Tlie sorghum aphis (Sipha [ Chaitophonis] fiara Forbes) 157 



A new genus of Aleyrodidge, with remarks on Aleyrode.'i nubifera Bergor and 



Aleyrodes citri Riley and Howard A. L. Quaintance. . 169 



Paraleyrodes, new genus 169 



Paraleyrodes (Aleurodicus) persex Quaintance 170 



Remarks on Aleyrodes nubifera Berger and Aleyrodes citri Riley and 



Howard 173 



Index 175 



