62 
HOW TO COLLECT 
Entomological forceps (two pairs), with curved ends for 
holding pins (from G. Buck, 242, Tottenham Court 
Iioad, London, W.). 
ENTOMOLOGICAL 
FORCEPS. 
Fine-pointed forceps (one or two pairs) : these are useful for 
arranging the legs and wings of specimens when pinned ; they can 
be obtained with the above. 
Needles (two or three) mounted in handles, — also for arranging legs 
and wings. 
Entomological pins (D. F. Tayler & Co., New Hall Works, 
Birmingham), Nos. 5 (Is. 6d per ounce), 7 (2s. 6d. per ounce), and 
20 (7s. Qd. per ounce). The No. 20 pin should be used for all but 
the very largest Diptera, such as Horse-flies (Tabanidse) and Bobber- 
flies (Asilidse) ; as it is exceedingly fine, an ounce will go a very 
long way. 
Common pins — a thousand or two, in paper packets. 
Gun-wad punches, Nos. 4, 12, and 20 bores (from any gun-maker), 
for punching discs of card. 
Cards (3-sheet Bristol board), from which to punch discs; a 
supply of the latter should be prepared ready for use. 
A pla.tyscopic lens (Messrs. Baker, 244, High Holborn, London, 
the case of a properly prepared jar the odour should be readily perceptible on 
removing the lid : if it is not, the reason may be that the mixture is too dry, 
when a little water poured on to the top layer will probably set matters right. 
After some months' use the cyanide loses its efficacy (to obviate this so far as 
possible the jar should never be allowed to remain open), and the mixture must 
then be renewed. 
A rough-and-ready method of mailing a hilling-jar or bottle is to cover the 
bottom with a layer of powdered cyanide, and to place above this a number of 
layers of blotting-paper. The layers of blotting-paper immediately in contact 
with the cyanide must be slightly damped ; but only sufficient water should be 
used to cause the cyanide to give off its odour. The top layer of blotting- 
paper must on no account be wet, and the less water used the better. 
