Elementary entomology (1912) Elementary entomology elementaryentom00sand Year: 1912 354 ELEMENTARY ENTOMOLOGY Fig. 491. Method of mounting inflated larvae (After Washburn) The rolling is then continued until the entire contents of the body have been forced out through the posterior end. A straw or a glass tube which has been drawn out to a fine point is next in- serted through the open- ing. This may in turn be attached to a rubber tube and bulb, or the larva may be inflated by blow- ing gently through the tube. In order to keep the specimen on the end of the tube, it should be allowed to
Elementary entomology (1912) Elementary entomology elementaryentom00sand Year: 1912 354 ELEMENTARY ENTOMOLOGY Fig. 491. Method of mounting inflated larvae (After Washburn) The rolling is then continued until the entire contents of the body have been forced out through the posterior end. A straw or a glass tube which has been drawn out to a fine point is next in- serted through the open- ing. This may in turn be attached to a rubber tube and bulb, or the larva may be inflated by blow- ing gently through the tube. In order to keep the specimen on the end of the tube, it should be allowed to dry for a few minutes. To thoroughly dry the skin it is kept distended inside a glass lamp chimney, which rests in a pan of sand over a gas or alcohol flame, as shown in Fig. 490. When the skin is thor- oughly dried, it is removed from the glass tube and may then be mounted on an elbow pin by bending the point of the elbow into a loop, which is dipped into glue and inserted into the opening in the abdomen. Another method is shown in Fig. 491. Dissecting instruments. The number of different instmments required for the study of the anatomy of insects is not great. However, owing to the small size of the specimens studied, the instruments should be of the very best material. Forceps. Forceps should be of two kinds, curved-pointed and straight-pointed (Fig. 492). Both pairs should have very fine points which are slightly roughened. Scissors. Curved scissors will be found very useful in carrying on minute dissecting work, the difficulty being to secure a pair that will cut entirely to the point. In using the fine- pointed scissors, care must be exercised not to strain them by cutting too thick objects, ^^ Scalpels. These are of less importance in JJr''veSpoinL''d'lnd entomological work than in most other forms straight-pointed
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