PBOCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 961 



The upper space contains a single trough (a) and carries envelopes 

 with a base of 5^ inches. 



" Figure 2 represents the reverse of the same box, with two 

 smaller troughs (b, c) to contain envelopes of half the size. 



" Figure 3 shows a box of the same size, but designed for the 

 smaller-sized envelopes alone, and containing four troughs (d, e, /, g.). 



" Figure 4 is a larger box, of just double the depth of the others, 

 measuring 9 in. by 6 in. by 6 in. with a diagonal partition forming a 

 single trough above and below {h, i), capable of carrying envelopes 

 of a larger size. 



" (In figures 2, 3, and 4 the two lids have been omitted for the 

 sake of clearness.) 



boxes are designed for three sizes of envelopes, which gives 

 a sufiicient range for butterflies of any size. Size 1 is made from a 

 rectangle 8 in. by 5 in., size 2 from a rectangle 6 in. by 4 in., size 3 from 

 a rectangle measuring 4 in. by 2j in. 



" It is found in practice that a box made according to figure 1 

 will carry, without overcrowding, from 100 to 130 full envelopes in the 

 larger trough, and from 175 to 200 in each of the two smaller spaces. 

 Design 2 wUl hold in each of the four spaces 225 Lycajnidse, making a 

 total of. 900 insects. Design 3 will hold 75 or more filled envelopes 

 in each of the two spaces. 



" For convenience of examination the insects should be arranged 

 in families ; the genera alphabetically in each family, and the species 

 alphabetically in each genus. Subsequent additions can be slipped 

 into their places without disturbing those already in position. To 

 keep the envelopes in place when the troughs are only partly occupied, 

 triangular blocks of cork about f inch thick can be employed. For 

 use as collecting boxes the troughs can be charged with empty enve- 

 lopes, and the cork triangles will serve as markers to separate the unused 

 envelopes as they are filled. 



" The boxes illustrated are of the simplest design, as made by a 

 local tinsmith in Ceylon. They can be improved by a coating of black 

 japan on the outside. 



" Messrs. Watkins and Doncaster have adopted this design, and 

 are turning out boxes (to suit their special-sized envelopes) in stout 

 japanned zinc, with perforated partitions at the end of each trough 

 for the reception of naphthaline or camphor." {Spolia Zeylanica, VII. 

 pp. 164-166 (May 1911)). 



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