Mating and laying sites of Uromenus brevicollis insularis, a Cyrno-Sardininian micro-endemic species, are described from observations conducted at night in several Corsican localities. Asphodelus ramosus was found to be a key host species as both mating and oviposition of this insect take place mainly on the erect dry stems of the plant. Some aspects of the meeting of the sexes are assessed: male stridulation does not appear to play an important role. The females lay their eggs, creating vertical lines in the stem by chewing regularly spaced holes containing nearly 3 eggs per hole. One to three laying lines can be observed on a single stem. Ferula communis is frequently used as an alternative laying site when A. ramosus is absent or rare, but in this case, the eggs can be attacked by woodpeckers (Dendrocopos sp.) or parasitized by Hymenoptera.
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Vol. 16 • No. 2