27 



cular we mail only to tliosc pai'lirs iiilci'oslcd in lliat crop. Or often 

 wt' wish lo know some Iruil oi- Iruclc .i^rowcrs in a certain county and 

 can secure their names l)y running; ovei- tills file. Helow 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 (;5 V,\ ") ("ARDS). 



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

 insect and the scientific name of the pest, toucl her with numl)er of 

 accession to collection and experiment numlx'i-, if any. These items 

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

 These are arran,<i:ed alphabetically accoi-din^ to food plants and }jrenera. 

 All accessions to the collection and records of injui-y to various plants 

 are recorded on these cards, each insect being <j:iven a difTerent card. 

 Thus at a jjlance 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 aiTecting that plant in the economic 

 collection, 



ACCESSION CATALOGUE (:} RY CARDS). 



If specimens which are to be preserved accompany the letter they 

 are given a number in the accession catalogue. This is i-ecorded on 

 8 by /) cards. Each accession is given a separate card, the cards Ixdng 

 numbered consecutively with a numbering stamp. This card gives 

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

 work, date and place 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 entere<l on the food catalogue, after which the 

 space on the accession catalogue marked "Food catalogue" is 

 che(ked. In the same way the accessions are entered (m the distri- 

 l>uti<)n maj) and the space on the accession card checked when so 

 entcj-ed. A blank on the accession cai'd is left to indicate the name 

 of the |iar1y d<'terniining the species. In case this is some specialist 

 at a distance, the card is seiil to him so t hat he can secure the full 

 record of lli(> specimen, and he then signs his name in this space upon 

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

 abltrevations the manner in which the sp<M'imen is preser\ed and 

 after '"Col. No." is givj'U the nund)er of the block on whi<*h the speci- 

 men is 1(» be found in the economic collection. This nund>er is simi- 

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

 an<l will be further explained later. 



I>y having a card for each accession, and the cards numbere<l by 

 machine, a lunnber of m(Mi may be assigned a series of niunbers \\ilh- 

 out having to refer to <'ach other. Thus (»ne is i;i\ en car<ls niiniltered 



