Eulophidae Of Costa Rica (Hymenoptera: Chalcidoidea), 4 The Genus Closterocerus Westwood S. Str. Author Hansson, Christer text Taxonomic Monographs on Neotropical Hymenoptera 2022 Oxford, England 2022-04-28 1 1 1 137 http://dx.doi.org/10.5281/zenodo.6464278 journal article 10.5281/zenodo.6464279 978-1-7397467-0-4 2754-9844 FE033A11-ACCB-4C6D-B185-63420F8CA79B Closterocerus tumidus sp.nov. ( Figs 178–181 ) Diagnosis. Female antenna with scape slightly flattened, widest medially, pedicel and flagellum not flattened ( Fig. 179 ); male scape strongly inflated ( Fig.181 ), ca 2× as long as wide; pronotal collar without a carina along anterior margin ( Figs 178, 180 ); midlobe of mesoscutum with three pairs of short setae ( Fig. 178 ); mesoscutum and mesoscutellum metallic purple with strong and dense reticulation ( Fig. 178 ); fore wing hyaline with apical margin and part below stigmal vein infuscate ( Fig. 179 ); hind tarsus with T1–3 white, T4 pale brown ( Fig. 179 ); length of body female 1.1–1.2mm , male 0.8–1.3mm . Female holotype : length of body 1.2mm . Antenna with scape, pedicel and F1 dark brown, F2–5 pale brown. Frons golden-green. Vertex metallic purple. Mesoscutum, mesoscutellum and dorsellum metallic purple. Propodeum dark brown with golden-green tinges. Coxae and femora dark brown; fore and mid tibiae infuscate with base darker, hind tibia dark brown with apex white; fore tarsus pale brown, mid and hind tarsi with T1–3 white and T4 pale brown. Fore wing hyaline with apical margin and part below stigmal vein infuscate; hind wing hyaline. Petiole dark brown. Gaster dark brown with metallic tinges. Antenna with scape slightly flattened, widest medially, pedicel and flagellum not flattened. Frons with strong reticulation; frontofacial suture V-shaped. Vertex with strong reticulation. Subtorular sutures missing. Occipital margin rounded. Pronotal collar without a carina along anterior margin. Mesoscutum and mesoscutellum with strong reticulation; notauli distinct in anterior one-half; midlobe of mesoscutum with three pairs of short setae. Dorsellum convex with weak reticulation. Propodeum smooth, without median carina; callus with two setae. Fore wing speculum closed; without a stigmal hairline and with radial cell ±hairy. Petiole very short, just a narrow band. Gaster oval-shaped; Gt 1 smooth, remaining tergites with very weak reticulation. Relative measurements: head length dorsal 15.5; head length frontal 24; head width 32; POL 7; OOL 3.5; lateral ocellus maximum width 2; eye length 16; malar space 6.5; mouth width not measurable; mesosoma length 41; mesosoma width 31; mesoscutellum length 17; mesoscutellum width 18.5; fore wing length 69; fore wing width 39; marginal vein length 33.5; postmarginal vein length 2; stigmal vein length 5; fore wing marginal fringe length 5; gaster length 45; gaster width 30. Variation in paratype material. Length of body 1.1–1.2mm . The paratype is similar to the holotype . Male ( Figs 180, 181 ). Length of body 0.8–1.3mm . Scape strongly inflated, pale brown with dorsal part dark brown. Vertex metallic purple, or with anterior one-half metallic blue and posterior one-half metallic purple. Mesoscutum metallic bluish-green, or metallic purple. Mesoscutellum golden, or golden-red. Propodeum metallic purple. Otherwise as in female. Hosts . Unknown. Distribution. Peru . Material examined. Type material. Holotype ♀ “ PERU : Cusco , Ollantaytambo , 19.xii.1983 , L. Huggert ” ( MZLU ) . Paratypes 1♀ 9♂ with same label data as holotype ( MZLU ) . Etymology. From the Latin tumidus = swollen, referring to the inflated male scape.