THE CANADIAN ENTOMOLOGIST, 39 



into the cocoon they retain the pupa more securely. The pupa and the 

 larva also in cocoon before its change, when disturbed, throw themselves 

 from side to side so rapidly as to give a sound like a shaken seed pod. 



July 15th, one pupa disclosed a male iinijuga, rather under size ; the 

 second, smaller one, failed to give an imago. 



Notes. — July nth, when taking dinner at a farm house, I saw a large 

 female of this species fly in at the open door ; it flew about the room until 

 captured. There was a specimen of P. candicans growing hard by. 



BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



We desire to call the attention of our readers to the following circular 

 lately issued from the Department of the Interior : 



Department of the Interior. 



Ofiice of the U. S. Entomological Commission, 



Providence, R. I., Jan'y ist, 1881. ) ^ 



Dear Sir, — 



The U. S. Entomological Commission designs preparing for publication 

 a bibliography of American (and Canadian) economic entomology. The 

 bibliography will contain references to papers, articles and notes in ag|i- 

 cultural and popular scientific periodicals, as well as journals devoted :to 

 bee culture, and as complete as possible references will be made to ento- 

 mological notes in those periodicals which appeared prior to 1850. T^e 

 titles of notes, articles, reports on works, will be entered under the name 

 of authors, or of periodicals, especially agricultural reports and papers 

 with brief digest of contents given in a line or two, in the same style as 

 in Mr. Mann's excellent bibliographical record of Psyche, the organ of the 

 Cambridge Entomological Club, of Cambridge. 



After due pains are taken such a record will necessarily be quite 

 imperfect. The compiler will have to rely much on aid from authors of 

 any and every article or note in economic entomology. Its completeness 

 will greatly depend on the care with which entomologists may prepare lists 

 of their own articles. Entomologists are, therefore, earnestly requested to 

 co-operate by sending full lists of their papers on any subject connected 

 with econojiiic entomology (not general or scientific entomology unless bear- 

 ing on the applied science) and prepared in the style of that of Psyche, to 

 the undersigned, at Providence, R. I. Very respectfully, > ' 



A. S. Packard, Jr. 



