CONTENTS OF THIS NUMBER. 



EwiNG, H. E. — A Synopsis of the Genera of Beetle 

 Mites With Special Reference to the North Ameri- 

 can Fauna 117 



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



Lachnus 133 



Florence, Laura — The Pacific Coast Species of Xylo- 



coccus (Scale Insects) 147 



McGregor, E. A. — Six New Species of Mallophaga 



From North American Mammals 167 



Baumberger, J. P. — Hibernation : A Periodical Phe- 

 nomenon 1 79 



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 Manilae Ashm. 



Into the Hawaiian Islands 207 



Headlee, Thomas J., and Beckwith, Charles S. — 



Some Recent Advances In Mosquito Work 211 



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



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 State University, Columbus, Ohio, U. S. A. 



