Revision of the Lachnaia tristigma (Lacordaire, 1848) species-group (Coleoptera: Chrysomelidae) and description of a new species Author Ruiz-García, Andrés Baselga And Javier text Zootaxa 2007 1630 39 46 journal article 10.5281/zenodo.179407 e00eaf33-9271-4122-91c0-982945054422 1175-5326 179407 Key to the species of the Lachnaia tristigma species-group 1. Median lobe of aedeagus shorter, with a small mushroom-shaped piece in the operculum ( Figs. 7–8 ). Sclerites of endophallus ( Figs. 13–16 ), with two lateral pieces short, not enlarged apically and markedly bent medially, and the unpaired central sclerite clearly broader than long. Spermathecal duct short and curled in numerous small loops ( Figs. 22–23 ). Iberian Peninsula and southern France ............................... ................................................................................................................... Lachnaia tristigma (Lacordaire) - Median lobe of aedeagus larger ( Figs. 1–6 ). Sclerites of endophallus ( Figs. 9–12 ), with two lateral pieces long, slightly bent medially. Spermathecal duct long ( Figs. 17–21 ) ......................................................... 2 2. Operculum of median lobe of aedeagus with a mushroom-shaped piece wider than the lateral arms ( Figs. 3–6 ). Sclerites of endophallus ( Figs. 10–12 ), with two lateral pieces sometimes bent but not enlarged apically, and the unpaired central sclerite as broad apically than basally, or broader basally. South-eastern Spain , from Malaga to Alicante .......................................... Lachnaia pseudobarathraea Daniel & Daniel - Operculum of median lobe of aedeagus with a mushroom-shaped piece as wide as lateral arms ( Figs. 1– 2 ). Sclerites of endophallus ( Fig. 9 ), with two lateral pieces enlarged apically, and the unpaired central sclerite broader apically than basally. North-western Spain : Galicia .................. Lachnaia gallaeca n. sp.