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cular we mail only to those parties interested in that crop. Or often 

 we wish to know some fruit or truck growers in a certain county and 

 can secure their names by running over this file. Below is a record 

 of literature sent the correspondent and the dates and subject-matter 

 of letters sent to and received from him. 



FOOD PLANT RECORD (3 BY 5 CARDS). 



The stamp on the letter also contains blank for the food of the 

 insect and the scientific name of the pest, together with number of 

 accession to collection and experiment number, if any. These items 

 are first entered on the Food Plant Record. This is on 3 by 5 cards. 

 These are arranged alphabetically according to food plants and genera. 

 All accessions to the collection and records of injury to various plants 

 are recorded on these cards, each insect being given a different card. 

 Thus at a glance we can secure a reference to all notes and specimens 

 of all insects recorded as affecting a given plant. On each card is 

 indicated the position of insects affecting that plant in the economic 

 collection. 



ACCESSION CATALOGUE (3 BY 5 CARDS). 



If specimens which are to be preserved accompany the letter they 

 are given a number in the accession catalogue. This is recorded on 

 3 by 5 cards. Each accession is given a separate card, the cards being 

 numbered consecutively with a numbering stamp. This card gives 

 the name, number of specimens of each stage of the insect and its 

 work, date and j)lace of capture, food, collector, and notes. At the 

 bottom are spaces for indicating the family and order of the insect. 

 This is to enable a clerk unfamiliar with the classification to record 

 the species on the distribution map to be explained below. 



All accessions are entered on the food catalogue, after which the 

 space on the accession catalogue marked "Food catalogue" is 

 checked. In the same way the accessions are entered on the distri- 

 bution map and the space on the accession card checked when so 

 entered. A blank on the accession card is left to indicate the name 

 of the party determining the species. In case this is some specialist 

 at a distance, the card is sent to him so that he can secure the full 

 record of the specimen, and he then signs his name in this space upon 

 determining it. In a space marked "Preserved" is indicated by 

 abbrevations the manner in which the specimen is preserved and 

 after "Col. No." is given the number of the block on which the speci- 

 men is to be found in the economic collection. This number is simi- 

 lar to the number of a library book catalogued by the decimal system, 

 and will be further explained later. 



By having a card for each accession, and the cards numbered by 

 machine, a number of men may be assigned a series of numbers with- 

 out having to refer to each other. Thus one is given cards numbered 



