author's abstract of this paper issued 

 by the bibliographic service, september. 



MULTIPLE COMPLEXES IN THE ALIMENTARY 

 TRACT OF CULEX PIPIENS 



CAROLINE M. HOLT 



Simmons College, Boston, Massachusetts 



THIRTY-THREE FIGURES CfOUR PLATES) 



CONTENTS 



Introduction 608 



Technique 608 



Previous observations on the alimentary tract of Culex 609 



Behavior of the gut cells during metamorphosis 609 



Mitosis in multiple-complex cells 611 



Disintegration of the cells 615 



Discussion 615 



Summary and conclusion 617 



Bibliography 618 



INTRODUCTION 



The phenomena discussed in this paper first came to our 

 attention in the course of a systematic study of the chromosomes 

 of Culex pipiens under the direction of Dr. McClui^ in the 

 Zoological Laboratory of the University of Pennsylvania. 

 The work was undertaken by a group of graduate students for 

 the purpose of verifying certain accounts of this species already 

 published. But in the course of the investigation so many 

 interesting questions arose that it was decided to make a more 

 thorough study of the cells of Culex than had originally been 

 planned. Accordingly, after a general investigation of all the 

 tissues, each student directed his attention to some particular 

 phase of the work. At the same time, each contributed what- 

 ever came under his observation which would be of use to the 

 others. 



I wish here to acknowledge my indebtedness, first of all, to 

 Dr. McClung for the encouragement, the invaluable counsel 



007 



