. Elementary entomology. Insects. PRESERVING AND STUDYING INSECTS 345 May-flies, dragon-flies, and stone-flies. The pin is inserted in the metathorax, and a fine wire run from the end of the body into the thorax. In the case of the May-flies this wire should be left projecting to serve as a support for the posterior setae, which should be attached to the wire. The wings of both the May-flies and dragon-flies should be spread. This is done by means of a spreading board. Spreading boards. Fig. 480 shows the construction of a simple spreading board. Two soft-pine boards are placed parallel on sho
. Elementary entomology. Insects. PRESERVING AND STUDYING INSECTS 345 May-flies, dragon-flies, and stone-flies. The pin is inserted in the metathorax, and a fine wire run from the end of the body into the thorax. In the case of the May-flies this wire should be left projecting to serve as a support for the posterior setae, which should be attached to the wire. The wings of both the May-flies and dragon-flies should be spread. This is done by means of a spreading board. Spreading boards. Fig. 480 shows the construction of a simple spreading board. Two soft-pine boards are placed parallel on short crosspieces, the boards being at a slight angle to each other. The edges of the board should be from one sixteenth to one half an inch apart, depending on the size of the insects to be mounted. A thin sheet of cork is glued to the underside of the boards. When the spread- ing board is used, the insect is pinned in the ordinary man- ner and the pin is then forced through the sheet of cork until the dorsal portion of the insect is nearly level with the upper surface of the boards. The spreading board, of course, FlG" 48,a BToard, showing, Pm'tho* °f spreading Lepidoptera. (Reduced) must be selected with a groove wide enough to accommodate the body of the insect. After being placed on the spreading board, the wings of the insect are brought forward and held in position by narrow strips of paper or tracing cloth, as shown in the illustration. Glass-headed pins are handy for pinning the strips. The spreading board is then set away until the insect is thoroughly dry. In the case of the May-flies the front margins of the first pair of wings are brought forward until they are at right angles with the body. In the case of the dragon-flies the hind margins of the first pair of wings should be at right angles to the body. In pinning stone-flies, usually only the wings of the right side are spread,. Please note that these images are extracted from scanned page images that may have
Size: 1403px × 1782px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookpublisherbostonnewyorketcginnandcompany, booksubjectinsects
