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fied in zoological order; the correspondence is alphabetically arranged 

 by half years ; and the library is arranged in order of subjects and 

 catalogued on cards, article by article, under authors' names, this card 

 catalogue having subordinate subject indexes. 



The reference collection in entomology is in excellently made double 

 boxes, usually four specimens representing each species, one bearing a 

 species label, which shows, beneath, the date and locality of the speci- 

 men and the name of the person responsible for the determination. 

 The other three specimens have date and locality only, with sometimes 

 a species number, where it is possible that specimens of different but 

 similar species may get mixed by inadvertence in returning specimens 

 to the boxes. 



The miscellaneous, duplicate, and undetermined specimens are also in 

 labeled boxes (if dry), all classified, at least to families, each winter, 

 and all bearing a number corresponding to an entry in the accessions 

 catalogue. If the species has been determined, the specimen will also 

 bear a species catalogue number. The alcoholic economic and miscel- 

 laneous material is in vials and bottles, closely stored in racks, each 

 vial bearing at least an accessions catalogue number, this series being 

 arranged in numerical order. 



The accessions catalogue contains an entry for each time and place 

 at which collections have been made, showing date, place, collector's 

 name, and the general character of the collection, as nearly as it can 

 be conveniently described without determination. This catalogue has 

 also a broad column for cross references to the species catalogue. 

 These accessions catalogue numbers must be placed on every package 

 of specimens received, and, as packages are broken up and the contents 

 mounted, on each specimen, except where these are put into the refer- 

 ence collection, when the data indicated are written out on a label, as 

 above described. All note slips referring to these collections must also 

 make a cross reference to this accessions catalogue; that is, must bear 

 the proper accessions catalogue number. In brief, every specimen, 

 every note, and every entry in the species catalogue must show a refer- 

 ence to the accessions catalogue, and every entry in the latter must 

 finally refer to the species catalogue by as many numbers as there were 

 species in the collection represented by it. These latter references ena- 

 ble one to learn in a moment what any given collection consisted of. 



Material intended for the breeding cages is likewise entered and 

 numbered on the accessions catalogue, and this number is placed at the 

 head of the breeding-cage record, kept on slips like the other notes. 

 Whatever specimens are bred are similarly entered, references being 

 made by number to these entries in the body of the notes. 



The species catalogue is simply a numbered list of specific names, 

 with references against each entry to all the accessions catalogue num- 

 bers representing collections in which the species was found. These 

 references enable one to determine for each species all the dates and 



