CONTENTS 



The Phylogenetic Origin of the Mandibles of Insects and their 

 Arthropodan Relatives. A Contribution to the Study of the 

 Evolution of the Arthropoda. By G. G. Crampton, Ph. d. . 63 



Revision of the Genus Ligyrocoris Stal (Hemiptera, Lygaeidae). 



By H. G. Barber .... 100 



New Species of reared Gall Midges (Itonididae). By E. p. Felt, 



State Entomologist, N. Y 115 



Proceedings of the New York Entomological Society .... 119 



