Moniliform egg-strings laid by Davidius moiwanus taruii Asahina & Inoue, a case of ”non-contact sitting oviposition” (Anisoptera: Gomphidae)

A case of ’’non-contact sitting oviposition (sensu EDA, 1960, Insect Ecol. 8: 82-88) and the formation of moniliform egg-strings in D. moiwanus taruii is described. This seems to be the second record of this type of oviposition and the first record of moniliform egg-string formation in Odonata. Some considerations are made on the types of oviposition in the Order, especially in relation to the adhesive power of the surface material of eggs.