VOL. 20 OCTOBER 1918 No. 7 



PROCEEDINGS 



OF THE 



ENTOMOLOGICAL SOCIETY 



OF WASHINGTON 



CONTENTS 



AINSLIE, C. N. 1 A NOTE ON THE ECONOMIC IMPORTANCE OF SAMIA CE- 



CROPIA (LEP.) 150 



CAUDELL, A. N. TWO NEW SPECIES OF THE BLATTID GENUS ARENIVAGA 



(ORTH.) 154 



CUSHMAN, R. A/ NOTES ON THE COCOON SPINNING HABITS OF TWO SPECIES 



OF BRACONIDS (.HYM.) 133 



GAHAN, A. B. A SYNOPSIS OF THE SPECIES BELONGING TO THE CHALCI- 



DOID GENUS RILEYA ASHMEAD (HYM.) 136 



GREEN, CHAS. T.' A NOTE ON THE HABIT OF PEGOMYIA AFFINIS STEIN 



AND OTHER AUTHORIZED GENERA 160 



ROHWER, S. A. THE NORTH AMERICAN SPECIES OF THE SAWFLY GENUS 



LAURENTIA (HYM.) , 157 



WHITE, G. F. A NOTE ON THE MUSCULAR COAT OF THE VENTRICULUS OF 



THE HONEY BEE (APIS MELLIFICA) r 152 



PUBLISHED MONTHLY EXCEPT JULY, AUGUST AND SEPTEMBER 



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OFFICE OF PUBLICATION 



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Entered as second-class matter February '28, 1913 at the post office at Baltimore, Maryland, 



under the act of August 24, 1912. Acceptance for mailing at special rate of postage 



provided for in Section 1103, Act of October 3, 1917, authorized 



on July 3, 1918. 





