Morphology and review of the odd genus Rhadinoscelidia Kimsey, 1988 (Hymenoptera, Chrysididae, Loboscelidiinae) Author Kimsey, Lynn S. Department of Entomology, University of California, One Shields Ave., Davis, California 95616 lskimsey@ucdavis.edu text Journal of Hymenoptera Research 2018 2018-02-26 62 45 54 http://dx.doi.org/10.3897/jhr.62.20888 journal article http://dx.doi.org/10.3897/jhr.62.20888 1314-2607-62-45 6F3C0E6BD5B647BB9B48833D8C816D89 FFA5E279FF83FF91FFB84E56FFDDFC6F 1222511 Genus Rhadinoscelidia Kimsey Rhadinoscelidia Kimsey, 1988:77. Type species: Rhadinoscelidia malaysiae Kimsey, 1988: 78. Monobasic and original designation. Diagnosis. Rhadinoscelidia is distinguished from Loboscelidia by the extreme reduction of the wing venation, short male flagellomeres, slender legs, and, in particular, the strongly constricted postocellar area of the head. Description. Vertex strongly arched dorsally, with ocelli at apex and sharply declivous posteriorly; genal fringe short, not extending onto cervical plate, separated from ventral surface by carina or flange, with separate anterolateral fringe; male scape length twice or more eye height, without transparent flange; male F-II-X less than twice as long as broad, apical flagellomeres about as long as broad; pronotum narrowed medially in dorsal view, broadly rounded laterally and dorsally, anterior fringe located on anterolateral angle or tubercle, less than 0.25 x eye height; mesopleuron with omaulus and without indication of scrobal sulcus; scutum with notauli; scutellum as long as scutum; metanotum narrow and parallel-sided; forewing without A or cu-a, venation occupying less than one-fifth of wing; membrane evenly stained, wing 0.2-0.3 x as long as broad; femora with small apical flanges; tibiae without transparent flange. Distribution. The genus is known from Hainan Island (China) (Liu and Xu 2011), Thailand, Laos ( Kimsey1988 ), Indonesia (West Java) (Kojima, Ubaidillah 1988) and Malaysia (mainland) ( Kimsey 1988 ). Key to species of Rhadinoscelidia

1	Hindtarsal claw edentate; eye small, separated by more than half its diameter from ocelli in lateral view (Figs 9 , 10 ); vertex rounded without carina or line posterior to or laterad of hindocelli (Fig. 10 )	Rhadinoscelidia chaesonensis Kimsey, sp. n.
-	Hindtarsal claw with one small subsidiary tooth; eye larger, separated by half its diameter or less from ocelli in lateral view (as in Fig. 11 ); vertex angulate and/or with carina or line posterior to and/or laterad of hindocelli	2
2	Flagellomere I twice as long as broad; frons with Y-shaped carina extending ventromedially from midocellus; West Java	Rhadinoscelidia halimunensis Ubaidillah
-	Flagellomere I 1.3-1.6 x as long as broad; frons with wrinkles or fine carinae radiating ventrally from midocellus	3
3	Vertex without transverse carina or sharp angle behind ocelli; flagellomere XI 1.9 x as long as broad; Hainan Is., China	Rhadinoscelidia delta Liu, Yao & Xu
-	Vertex with transverse carina or sharp angle behind ocelli; flagellomere XI 1.6-1.7 x as long as broad; Laos, Malaysia, Thailand	Rhadinoscelidia malaysiae Kimsey

Species descriptions