Subfamily Trigonomiminae

Genera in the subfamily Trigonomiminae drop 3 to 326 eggs onto the soil or possibly onto vegetation. The spherical to slightly oval or oval eggs are creamy white to light or dark brown. They range in length from 0.24 to 0.32 mm and width from 0.16 to 0.32 mm. Damalis eggs have hexagons and tiny spicules on the surface. The eggs of Holcocephala have irregular pentagons and hexagons with thick or tall, thin ridges. Aeropyles are present on the eggs of Holcocephala. Damalis and Holcocephala eggs have one micropyle with the micropyle of the latter in a broad, smooth or floral-like area.

The egg stage of Damalis lasts 14 days and the larvae and pupae occur in the soil. First-instar larvae of Damalis have been described and figured. General information on Trigonomiminae pupae has been published.