CONTENTS OF VOLUME X. 



PAGE 



CocKERELL, T. D. A. — Fossil Insects 1 



WiLLiSTON, S. W. — Camptopelta, a New Genus of Stratiomyidae 23 



Metcalf, Z. p. — The Wing Venation of the Cercopidae. 27 



Welch, Paul S. — Further Studies on Hydromyza Confiuens Loew 35 



Du Porte, E. M., and Vanderleck, J. — Studies on Coccobacillus Acridiorum 



d'Herelle, and on Certain Intestinal Organisms of Locusts 47 



Hess, W. N. — The Chordotonal Organs and Pleural Discs of Cerambycid 



Larvae 63 



Sanders, J. G., and DeLong, D. M. — The Cicadellidae (Jassoidea. Fam. 



Homoptera) of Wisconsin, with Description of New Species 79 



Aldrich, J. M. ^Proceedings of the Entomological Society of America, 



New York Meeting 98 



EwiNG, H. E. — A Synopsis of the Genera of Beetle Mites With Special Reference 



to the North American Fauna 117 



Gillette, C. P. — Some Colorado Species of the Genus Lachnus 133 



Florence, Laura — The Pacific Coast Species of Xylococcus 147 



McGregor, E. A. — Six New Species of Mallophaga from North American 



Mammals 167 



Baumberger, J. P. — Hibernation: A Periodical Phenomenon 179 



Crampton, G. C. — The Nature of the Veracervix or Neck Region in Insects. . 187 



Zetek, James — The Ecology of Bubonic Plague 198 



MuiR, F. — The Introduction of Scolia Manilje Ashm. Into the Hawaiian 



Islands 207 



Headlee, Thomas J. and Beckwith, Charles S. — Some Recent Advances in 



Mosquito Work 211 



Jones, Chas. R. — New Species of Colorado Syrphidae 219 



Bra UN, Annette F. — Observations on the Pupal Wings of Nepticula, with 



Comparative Notes on Other Genera 233 



Hyslop, J. A. — The Phylogeny of the Elateridas Based on Larval Characters . . 241 

 Hollinger, a. H. — Taxonomic Value of Antennal Segments of Certain Coccidee 264 

 Prison, Theodore H. — Notes on Bombidae, and on the Life History of Bombus 



Auricomus Robt 277 



Palmer, Miriam A. — Additional Notes on Heredity and Life Hisotry in the 



Coccinellid Genus Adalia Mulsant 289 



Guthrie, Esther — New Mycetophilidas from California 314 



Hilton, Wm. A. — The Nervous System of Thysanura 303 



Cockerell, T. D. a. — Insects in Burmese Amber 323 



Ewing, H. E. — Parthenogensis in the Pear-slug Saw-fly 330 



Crampton, G. C. — A Phylogenetic Study of the Larval and Adult Head in 



Neuroptera, Mecoptera, Diptera and Trichoptera 337 



Isely, D wight — A Synopsis of the Petiolate Wasps of the Family Eumenidae 



(Hymentoptera) Found in America North of Mexico 345 



Carnochan, F. G. — Hololeptinas of the United States 367 



