Adult Solomon’s Seal Sawfly are black, 8-9mm long, and emerge in late spring at about the time the host plant is coming into flower. The female uses her saw-like ovipositor to insert rows of eggs into the leaf stems. The larvae initially make small elongate holes in the foliage (as in above photo), but as they increase in size their appetite also increases. The fully grown larvae go into the soil where they overwinter and pupate in the following spring. Defoliated plants survive but may produce reduced growth in the following year.