Ultrastructure of the eggs of Reduviidae: II eggs of Harpactorinae (Insecta: Heteroptera)
The harpactorine eggs, laid in clusters and covered by spumaline secretions, are distinguished from the eggs of other reduviid subfamilies by the elaborate net-work-like chorionic collar extensions and opercular outgrowths. The collar extensions may be short with spongy structure, or considerably long with honeycomb structure terminating in filamentous apices. The body of the egg has prominent follicular markings and the anterior end is marked by a distinct collar having the spermatic groove, aero-micropylar openings and the sealing bar. The chorionic collar extensions and the opercular outgrowths, along with the aero-micropylar systems and the inner aerostatic layer, efficiently transport atmospheric oxygen to the interior of the eggs. The ultrastructure of the chorion, the operculum and the aero-micropylar system of 5 species of harpactorine bugs from Southern India is reported.