Opsiini leafhopper genus Libengaia Linnavuori (Hemiptera: Cicadellidae: Deltocephalinae) in Africa and India with description of one new subgenus and six new species Author Viraktamath, C. A. Department of Entomology, University of Agricultural Sciences, GKVK, Bengaluru 560065, India Author Webb, M. D. Department of Life Science, The Natural History Museum, Cromwell Road, London SW 7 5 BD, United Kingdom Author Yeshwanth, H. M. Department of Entomology, University of Agricultural Sciences, GKVK, Bengaluru 560065, India text Zootaxa 2024 2024-09-11 5507 1 104 122 http://dx.doi.org/10.11646/zootaxa.5507.1.4 journal article 10.11646/zootaxa.5507.1.4 1175-5326 13747694 09AC0223-FC47-4C34-8719-0376CD92C837 Key to species of Libengaia Linnavuori (males) 1. Subgenital plate with distal membranous appendage ( Fig. 5B ); each aedeagal shaft without process near apex ( Figs 2E , 3E , 4E )............................... Libengaia ( Libengaia ) , (Central and West Africa).............................. 2 - Subgenital plate without distal membranous appendage ( Figs 8C , 10B ); each aedeagal shaft with process near apex ( Figs 8F , 9F , 10F )… Libengaia ( Nandiana ) , ( India )................................................................. 11 2. Aedeagus with forks of ventral process spiculose ( Figs 3 DE).............................. L . ( L. ) immaculata sp. nov . - Aedeagus with forks of ventral process glabrous............................................................. 3 3. Aedeagus with ventral process twice branched ( Figs 2 DE)................................. L . ( L. ) brevistylus sp. nov . - Aedeagus with ventral process once branched ( Figs 3D , 4C )................................................... 4 4. Aedeagal shaft in lateral view with apex three pronged ( Fig. 5F )................................ L . ( L. ) trifida sp. nov . - Aedeagal shaft not as above............................................................................. 5 5. Greyish species with dark markings....................................................................... 6 - Pale yellow species, crown with or without two prominent or faint black transverse spots, dark mottling on pronotum and forewings reduced................................................................................... 10 6. Style apophysis 0.66 as long as style ( Fig. 4G ).......................................... L. ( L. ) longistylus sp. nov . - Style apophysis less than half as long as style ( Fig. 4B )....................................................... 7 7. Aedeagus ventral process serrated along ventral margin in lateral view ( Fig. 4D )................ L . ( L .) deemingi sp. nov . - Aedeagus ventral process not serrated along ventral margin in lateral view........................................ 8 8. Aedeagus ventral process much longer than shafts in lateral view............................................... 9 - Aedeagus with ventral process slightly shorter than shafts in lateral view ( Linnavuori 1969 : Fig. 26d)................................................................................................... L . ( L. ) nicias Linnavuori 9. Aedeagus with process on preatrium as long as shaft in lateral view ( Linnavuori 1969 : Fig. 26a).... L . ( L. ) helias Linnavuori - Aedeagus with process on preatrium much shorter than shaft or absent ( Linnavuori 1969 : Figs 24ab)................................................................................................ L . ( L. ) vermiculata (Melichar) 10. Aedeagus with ventral process more than 2× as long as shaft in lateral view ( Linnavuori 1969 : Fig. 24g )............................................................................................... L . ( L. ) milionia Linnavuori - Aedeagus with ventral process about 1.5× as long as shaft in lateral view ( Linnavuori 1969 : Fig. 25b)................................................................................................. L . ( L. ) narcissa Linnavuori 11. Aedeagal shaft apex with one apical process ( Figs 8F , 10E )................................................... 12 - Aedeagal shaft apex with two processes ( Figs 9F–H )............................. L . ( N. ) lamerallis Sunil & Meshram 12. Aedeagal shaft apex with process thin, of uniform width, directed anterodorsally ( Fig. 10F ).... L . ( N. ) ramamurthyi sp. nov . - Aedeagal shaft apex with process retrorse and widened distad of midlength ( Fig. 8F ).................................................................................................... L . ( N. ) bharatiensis (Malhotra & Sharma)