5. Lateral view of a dragon fly to show the body sclerites.

All the abbreviations used in this plate are readily understood.

[PLATE II. Structures of Head, Mouth, Thorax & Genitalia]

1. Head of wasp from front.

2. Head of honey bee with mouth parts extended.

3. Head of Locustid from front, to show regions.

4. Head of a Lepidopteron from front.

5. Head of a cricket from front.

6. Labium of a cricket showing all usual parts.

7. Maxilla of Harpalus caliginosus, with all sclerites marked.