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form of publication has been used by a number of entomologists with 

 a great deal of success. 



Another device for the popularization of scientific matter has been 

 adopted by the New York State agricultural experiment station at 

 Geneva and consists in prefacing every bulletin by a very brief synop- 

 tic account of its contents, and, in not a few instances, there is a popu- 

 lar edition of the bulletin as well as an extended one. This popular 

 edition is very little different from a circular treating of an individual 

 species except that the popular bulletin includes the same field as the 

 more extended publication, whether that treats of a single insect or a 

 group of insects. 



Monographic economic accounts of insects are exceedingly valuable, 

 and are absolutely necessary to the advancement of the science. 

 Recent years have witnessed the issuing of a number of noteworthy 

 publications of this character, among which may be mentioned Slinger- 

 land's account of the codling moth, Card and Gillette's studies of the 

 same insect, and other bulletins of a similar character. In such pub- 

 lications as these, we should have a summary of all that is known, 

 together with a mass of original information. This work is absolutely 

 necessary, and probably the best method of making it public in the 

 majority of cases is by the use of the bulletin. These bulletins, how- 

 ever, must of necessity be published at irregular intervals, and there- 

 fore can have little connection one with the other. 



This scattered method of publication has serious disadvantages and 

 the monographic accounts of economic groups are designed to remedy 

 this evil. TVe have a number of noteworthy publications illustrating 

 this line of effort, among which may be mentioned Forbes's excellent 

 account of insects injurious to indian corn, Forbes and Hart's economic 

 entomology of the sugar beet, Slingerland's climbing cutworms, and 

 others of like character. Such publications appeal to the popular 

 mind because, as a general rule, they approach the subject from the 

 aspect of the practical grower, and are of more general service than 

 the detailed monographic accounts of individual insects. 



The technical bulletin is a publication of entirely different character 

 and is. or should be, designed almost solely for the use of the eco- 

 nomic worker and not for the general public. These bulletins are 

 usually issued in limited editions and sent only to those who can use 

 them to advantage. They may be and frequently are largely system- 

 atic in character and should include monographic accounts of consid- 

 erable economic importance on such subjects as parasites, leaf feeders, 

 borers, etc. Excellent representatives of these are seen in Howard's 

 Study of Insect Parasitism, Marlatt's account of Nematina? of North 

 America, Coquillett's Revision of the Tachinida?, and Hunter's Aphi- 

 didre of North America. Such works as these, though frequently 

 embodying much S3 T stematic and biologic work which apparently has 



