OF WASHINGTON, VOLUME XV, 1913. 83 



uted over central and northern Europe, defoliates the pine, as its 

 name indicates, to which at times, it is quite destructive. Arge 

 rosce L. is a rose pest widely spread over Europe, and occurs in 

 Siberia and Asia Minor. 



Janus compressus Fabr., of central and southern Europe, deposits 

 its eggs in the buds of the pear, which the larvse hollow out, and 

 later eat their way into the twig, tunnelling along the pith. Pam- 

 philius flaviventris Retz is distributed over western Europe. It 

 is known in England as the social pear saw-fly. Eggs are placed 

 in groups of from 30 to 60 on under-surface of pear leaves. The 

 young larvse at once commence to form a web, which is added to 

 as they grow, sometimes reaching a length of a foot. The larvae 

 also feed upon plum, cherry, white thorn and other rosaceous 

 plants. 



The author wishes to acknowledge the assistance of his colle igues, 

 Messrs. Schwarz, Dyar, Busck, Caudell, Heidemann, Knab, Rohwer 

 and others in connection with questions of nomenclature in the 

 orders in which they are respectively specialists. 



Commenting on Professor Quaintance's address, Mr. Maiiatt 

 said that he had been much interested in the presentation made, 

 and that the subject was most timely in view of the recent enact- 

 ment of the plant quarantine law which now furnishes, for the first 

 time in the history of the United States, a means of excluding for- 

 eign insect pests. It is therefore of especial importance just now 

 to make available a publication which will give descriptions and, 

 so far as possible, illustrations of all known important foreign insect, 

 pests, for the guidance of state inspectors and others engaged in 

 plant quarantine and inspection work. He said that he believed 

 Dr. Howard had in view the preparation of a comprehensive bulle- 

 tin covering this general subject, and that it was to be prepared 

 with the aid of the many experts which Dr. Howard had as his 

 assistants in the Bureau of Entomology. Such a publication, pre- 

 pared with the aid of these experts and edited by Dr. Howard, 

 should have a comprehensiveness and value which would make it 

 of great usefulness. 



The inspection of plant material imported by the Department 

 and other imported plant stock coming to the District of Columbia, 

 largely under the expert management of Mr. Sasscer, has shown 

 that much of such imported stock is infested, and the comparison 



