Revision of the Agathidinae (Hymenoptera, Braconidae) of Vietnam, with the description of forty-two new species and three new genera Author van Achterberg, Cornelis Author Long, Khuat Dang text ZooKeys 2010 54 1 184 http://dx.doi.org/10.3897/zookeys.54.475 journal article http://dx.doi.org/10.3897/zookeys.54.475 1313-2970-54-1 Coronagathis gen. n. Type species. Coronagathis cornifera sp. n. Etymology. Combination of "corona" (Latin for "crown" ) and the generic name Agathis Latreille because of the protuberances of the scutellum and the axillae. Gender: feminine. Diagnosis. Apex of antenna without spine; malar space somewhat protruding posteriorly (Fig. 109); area between antennal sockets with a pair of lamelliform crests (Figs 104, 105); frons with lateral carinae running to posterior ocelli; area behind antennal sockets rather deep and outer rim of antennal socket protruding; outer as pect of scapus sparsely punctulate and convex; malar suture absent; notauli complete and crenulate (Fig. 110); scutellum with pair of large horns and axillae protruding, wing-like (Figs 106, 110); second submarginal cell of fore wing rectangular and with an obsolete ramellus (Fig. 109); vein M+CU of hind wing about half as long as vein 1-M; hind wing with 2 + 4 hamuli; subbasal cell of hind wing narrower than plical lobe (Fig. 109); fore tarsal claws bifurcate, the inner tooth nearly as large as the outer tooth; outer face of middle tibia with one lateral and one apical peg; inner spur of middle tibia about 0.6 times as long as middle basitarsus; ventral carina of hind trochantellus weakly developed; inner and outer hind claw bifurcate, with a medium-sized subapical inner tooth; hind coxa enlarged and coarsely sculptured; first metasomal tergite smooth and depressed behind spiracles (Fig. 107); length of ovipositor sheath unknown, but probably about as long as apical height of metasoma or less. Phylogenetic position. Putative synapomorphous character states of the new genus Coronagathis are the horns of the scutellum, the wing-like axillae and the coarsely sculptured and elongate hind coxa, surpassing the apex of the first tergite. Its position is uncertain, but seems to be betweenthe genus Disophrys Foerster and the Coccygidium complex. Similar to Disophrys because of the carinae of the frons (present and running to the lateral ocelli) and the elongate hind leg. However, the derived character state of the short vein M+CU of the hind wing indicates that it belongs to the more derived group consisting of the Coccygidium complex and the genus Euagathis Szepligeti . The new genus lacks the synapomorphies of the Coccygidium complex as the apical antennal spine and the long inner spur of the middle tibia. It cannot be included in Euagathis , because Euagathis is characterised by the derived character state of the absent lateral carinae of the frons. The genus Hypsostypos Baltazar from Sulawesi and Sundaland is similar, but Hypsostypos has several autapomorphies. For example, the long impressed malar suture, the reduced notauli and the enlarged lamelliform antennal sockets. Distribution. Vietnam. Biology. Unknown.