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This picture shows the hinder rings of the abdomen and the ovipositor. The ovipositor serves to pierce the plant tissues.

Oak Gall Fly

This picture shows the hinder rings of the abdomen and the ovipositor. The ovipositor serves to pierce…

"A typical Thysanuran (Machilis maritima). Female, ventral view. Mx1, Mx2, 1st and 2nd maxillae. ii-x, Appendages on 2nd to 10th abdominal segments. The eversible sacs on the abdominal segments are shown, some protruded and some retracted. Ovp, Ovipositor. Mn, Mandible, and Mxl. maxillula, dissected out of head." — The Encyclopedia Britannica, 1910

Thysanuran

"A typical Thysanuran (Machilis maritima). Female, ventral view. Mx1, Mx2, 1st and 2nd maxillae. ii-x,…