94 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 1 



ings are simply unused, but remain in the key for the suggestive value 

 they have and for use under species to which they do apply. 



Practical usefulness of key. A fairly complete outline of this 

 sort is valuable for its continual suggestion when undertaking the 

 thorough study of any species. With any large volume of notes, par- 

 ticularly relating to one species, some system is indispensable. The 

 key given herewith has been put to thorough test in the large amount 

 of note material accumulated by the numerous agents of the Bureau 

 of Entomology during the six years of the Cotton Boll "Weevil investi- 

 gation. Because of its proven value in this work, it is presented here 

 as a suggestion of the possible divisions in the study of an economic 

 entomological subject and as a practicable means of so arranging the 

 records as to make them at all times easily accessible and completely 

 useful and also because the system seems to be of general applicabil- 

 ity in economic entomology. 



Key to Classification of Entomological Records 

 O Generalia, Continued. 



O Generalia. 



01 Bibliog-raphy. 



01.1 Indices and references. 



01.2 Special literature. 



01.3 State laws affecting entomology. 



01.31 Quarantine regulations. 



01.32 Inspection of nursery stock. 



01.8 Literature to secure. 



01.9 Miscellaneous literature. 



02 Statistical data. 



02.1 Climatological. (See 44 also.) 



02.2 Geological. 



02.3 Crop reports. 



02.4 Special census reports. 



02.5 Special crop statistics. 



03 Clippings. 



03.1 Entomological workers. 



03.2 Insect life histories. 

 (See 71 for arrangement.) 



03.3 Insect seasonal histories. 

 (See 71 for arrangement.) 



03.4 Insect control, natural. 



03.41 Climatological. 



03.42 Parasites. 



03.43 Predatory enemies. 



03.44 Diseases. 



03.5 Insect control, artificial. 



03.51 Traps. 



03.52 Insecticides. 

 03.521. Stomach poisons. 



(Arrange alphabetically.) 



03.522 Contact insecticides. 



03.523 Fumigants. 



03.53 Repellents. 



03 Clippiii|?s. 



03.54 Machines. 



03.55 Treatment of crop after har- 

 vesting. 



03.56 Restriction of spread. 



03.57 Cultural control. 

 03.6 Distribution. 



03.01 (Geographical. 



03.02 Geological. 



04 Accounts. 



04.1 Appropriations. 



04.2 Salaries. 



04.3 Equipment. 



04.31 Furniture and fixtures. 



04.32 Scientific apparatus. 



04.33 Tools and machinery. 



04.34 Library. 



04.35 Live stock. 



04.4 Maintenance. 



04.41 Supplies. 



04.42 Repairs. 



04.5 Postage, stationery, etc. 



04.51 Postage account. 



04.52 Stationery accounts. 



04.53 Telegraph accounts. 



04.54 Telephone accounts. 



04.6 Travel. 



04.7 Freight and express. 

 04.9 Contingent expenses. 



05 Species lists. 



05.1 Economic insects. 



05.2 Insects reported during corre- 

 spondence. 



