_Temporary Storage of Specimens._--If the entomologist is prevented from mounting his captures soon after returning from an expedition, or if, on extended collecting trips, time does not offer for this purpose, specimens of almost all orders except the Lepidoptera, Orthoptera, and Neuroptera may be placed in a small, tightly closing pill box, care being taken to keep the larger specimens apart from the small ones. In this way specimens will keep for an indefinite period, provided they are properly packed. In the case of the traveling collector, where the material is to be carried from point to point at great risk of breaking, specimens should be packed very carefully to prevent any shaking or rattling about in the boxes. This may be done by placing a round piece of soft paper on the top of the specimens in the pill box. This paper should be gently pressed down and the empty space above filled with other layers of paper or with cotton. The packing of specimens between cotton is not recommended, as it is a difficult and tedious task to afterwards free them from the adhering fibers. Layers of soft paper or, yet better, velvet, are preferable. [Illustration: FIG. 104.--Method of preserving Diurnal Lepidoptera in paper envelopes. (After Kiesenwetter.)] _Envelopes for Lepidoptera, etc._--On an extended trip, it will be found impracticable to mount and prepare insects requiring cumbersome apparatus for spreading, as Lepidoptera or Neuroptera, and a very excellent plan consists in folding the wings of the insect so that the lower surfaces come together and then placing it in a triangular envelope, as shown in the accompanying illustration. The collector should be provided with a quantity of paper of the requisite dimensions for making these envelopes, and specimens, as they are taken from the collecting bottle, may be rapidly inclosed in them, labeled, and packed away in a tight wooden (not tin) box containing a supply of naphthaline, the specimens thus occupying the minimum of space. Specimens secured in this way may be kept without further manipulation indefinitely or until time is found to relax and set them. This is also an excellent method of sending diurnal Lepidoptera and Dragon-flies through the mails and is preferable in some respects to mailing spread specimens. [Illustration: FIG. 105.--Spreading board for Lepidoptera.] [Illustration: FIG. 106.--Needle for spreading insects.]