21 



impossible (Canad. Entom.) ; other papers, historical or biological, based 

 upon material in the collection (in several scientific serials). 



By the Assistant, after a new arrangement and study of the Psocina of 

 the collection, a monograph of the United States species with anatomical 

 details (Psyche). A monograph of the species contained in amber is 

 ready for publication with plates. 



The Library of the department has been considerably enlarged, 

 chiefly by larger works. The part containing United States 

 publications has received a number of papers of the late Th. W. 

 Harris, never quoted before in the lists of this author's works, 

 which are now nearly complete in the Library. 



