Subfamily Stenopogoninae

Genera of Stenopogoninae deposit 3 to 20 eggs at a time in the soil. The eggs are suboval to elongate, and creamy white to white. The elongate eggs range in length from 0.90 to 2.29 mm and width from 0.52 to 0.77 mm. The suboval eggs of Archilestroides and Taperigna are 0.90 to 1.20 mm long and 0.60 to 0.72 mm wide.

Archilestroides eggs have raised bodies of irregular shapes and sizes. The eggs of Taperigna have hexagonal chorionic sculpturing. Both genera have aeropyles spread homogeneously on the egg surface and one or two circular to elongate micropyles in smooth areas.

Stenopogon larvae are known to feed on scarab beetle larvae and other insect larvae. The larvae of Grypoctonus in Japan have been described and figured, and Stenopogon spp. pupae have been described and figured.