New oriental genus of leafhoppers in the tribe Coelidiini with descriptions of new species (Homoptera: Cicadellidae: Coelidiinae)

A new genus, Stijlolidia , and two new species, Stylolidia pectinata n. sp. (type species) and Stijlolidii cristata n. sp., from Malaysia are described and illustrated. A key to the males of the known species is also included. The Oriental leafhoppers of the tribe Coehdiini are composed of five rather distinct genera, three of which are fairly large and have speciated over the entire region (Nielson 1982). Two genera, Mahellus Nielson and Jenolidia Nielson, are small and geographically restricted. The former occupies the western edge of the Oriental region, whereas the latter is known only from Borneo. The new genus Stylolidia is described from two new species, S. pectinata (type-species) and S. cristata, from Malaysia. Both species have unusual characters, i.e., tubular aedeagi without processes and styles with prominent spines, which distinguish the genus from other Oriental genera in the tribe. The styles of S. cristata are similar to Lodiana iinica Nielson, but in the former each style has two rows of uniseriate spines whereas the latter has only one row. Key to males of Stylolidia 1. Style with long spines arising from apex pectinata , n. sp. I Style with two rows of short spines arising from inner lateral margin of apical half. . . . cristata, n. sp.