THE HEAD-CAPSULE OF COLEOPTERASTICKNEY 



ACKNOWLEDGMENTS 



This study was pursued under the supervision of Professor Alex. D. 

 MacGillivray, to whom I am under the deepest obligations for all that his 

 supervision has meant to me in the way of helpful suggestions and real 

 inspiration. I must further thank him for permission to use his unpub- 

 lished morphological nomenclature. I am also greatly indebted to Profes- 

 sor S. A. Forbes for suggestions and for furnishing a large number of species 

 from the collections of the Illinois State Natural History Survey and from 

 the collections of the University of Illinois. I am further greatly indebted 

 to Professor H. F. Wickham of the Iowa State University, who supplied 

 me with a considerable number of species belonging to rare families; to 

 Messrs. E. A. Schwarz and H. S. Barber, and the authorities of the United 

 States National Museum for representatives of twelve very rare families 

 from the collections of the Museum; to Mr. W. S. Blatchley of Indianapolis 

 for many very rare species; to Dr. Edwin C. Van Dyke of the University 

 of California for a specimen of a species of Othnius; and to Professor 

 Henry C. Fall for a specimen of Hydroscapha. Of the many courtesies 

 that Dr. Chas. P. Alexander of the Illinois State Natural History Survey 

 has shown me I am duly appreciative. Finally, to Mrs. Elizabeth Stick- 

 ney, who has helped me greatly in the preparation of the drawings, I am 

 under deep obligations. 



