CONTENTS OF VOLUME VI. 



PAGE 



An Entomologist in Costa Rica. P. P. Calvert ; 1 



Determining the Flight of Mosquitos. James Zetek 5 



A Revision of the North American Species of the Dipterous Genus Neurigona. 



M. C. VanDuzee 22 



An Interesting Feature in the Venation of Helicopysche, the Molannidae, 



and the Leptoceridae. Cornelius Betten 65 



Homologies of the Wing Veins of the Membracidae. W. D. Funkhouser. ... 74 



The Wing Venation of the Jassidae. Z. P. Metcalf 103 



A New Hymenopterous Parasite on Aspidiotus Perniciosus Comst. D. G. 



Tower 125 



Officers of the Entomological Society of America 127 



Resolutions: On the Death of John B. Smith 128 



On the Death of Thomas H. Montgomery 129 



Proceedings of the Entomological Society of America — Cleveland Meeting. . 130 

 A Revision of the North American Species of Megastigmus Dalman. C. R. 



Crosby 155 



The Neuropterous Genus Palpares. Nathan Banks 171 



Stomoxys Calcitrans Linn. Part II. Chas. K. Brain 197 



The Biology of Perla Immarginata Say. Lucy W. Smith 203 



The Life-History of a Bee-Fly (Spogostylum Anale Say) Parasite of the Larva 



of a Tiger Beetle (Cicindela Scutellaris Say Var. Lecontei Hald). 



Victor E. Shelford 213 



A New Application of Taxonomic Principles. Chas. H. T. Townsend 226 



A Study in Antennal Variation. Edith M. Patch 233 



A Study in Variation in the North American Greenbottle Flies of the Genus 

 Lucilia, with Systematic Notes on the Species Involved. John 



K. Tothill 241 



Observations on the Chaetotaxy of Calliphorinae. Phineas W. Whiting 257 



A Revision of the Species in Agromyza Fallen, and Cerodontha Rondani. 



J. R. Malloch 269 



The Wing Venation of Fulgoridae. Z. P. Metcalf 341 



The Princeton Collection of Fossil Beetles from Florissant. H. F. Wickham 359 



A Contribution to the Biology of May-Flies. Anna H. Morgan 371 



The External Anatomy of the Squash Bug, Anasa Tristis, De G. Daniel 



G. Tower 427 



The Dipteran Fauna of Bermuda Chas. W. Johnson 443 



The Taxonomic Value of the Characters of the Male Genital Armature in 



the Genus Tetranychus, Dufour. H. E. Ewing 453 



A Synopsis of the Described North American Species of the Dipterous Genus 



Tipula L. W. G. Dietz 461 



Some Pemphiginae Attacking Species of Populus in Colorado. C. P. Gillette. 485 



