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 caelatus sp.nov. ( Figs 59, 60 ) Diagnosis. Antenna flattened, scape widest slightly below apex ( Fig. 60 ); pronotal collar with a carina along anterior margin ( Fig. 59 ); midlobe of mesoscutum with two pairs of strong setae ( Fig. 59 ); mesoscutellum with engraved reticulation ( Fig. 59 ); dorsellum concave; fore wing hyaline with a large infuscate spot below stigmal vein ( Figs 59, 60 ); stigmal vein elongate, 3.7× as long as wide and postmarginal vein 1.2× as long as stigmal vein ( Fig. 59 ); hind tarsus white ( Fig. 60 ); petiole as long as wide with sculpture on dorsal surface; length of body female 1.8mm . Female holotype : length of body 1.8mm . Antenna dark brown. Head with frons golden-green; vertex metallic bluish-purple. Mesoscutum and propodeum metallic bluish-green. Mesoscutellum and dorsellum golden-green. Coxae and femora dark brown with metallic tinges; tibiae and tarsi white. Fore wing hyaline with a large infuscate spot below stigmal vein, hind wing hyaline. Petiole black with metallic tinges. Gaster with Gt 1-2 metallic bluish-green, remaining tergites dark brown with metallic tinges. Antenna flattened, scape widest slightly below apex. Frons and vertex with strong reticulation, vertex smooth lateral of ocellar triangle. Frontofacial suture V-shaped. Subtorular sutures absent. Occipital margin rounded. Pronotal collar with a carina along anterior margin. Mesoscutum with strong reticulation; notauli distinct in anterior one-half; midlobe with two pairs of strong setae. Mesoscutellum flat, with strong engraved reticulation. Dorsellum concave and smooth. Propodeum smooth without median carina; callus with two setae. Fore wing speculum closed; without a stigmal hairline and with radial cell hairy. Petiole as long as wide with strong sculpture on dorsal part. Gaster ovate; Gt 1-2 smooth, remaining tergites with weak reticulation. Relative measurements: head length dorsal 20; head length frontal 26; head width 41; POL 7; OOL 4; lateral ocellus maximum width 3.5; eye length 21.5; malar space 6; mouth width 10; mesosoma length 60; mesosoma width 39; mesoscutellum length 23; mesoscutellum width 23; fore wing length 90; fore wing width 55; marginal vein length 48; postmarginal vein length 12; stigmal vein length 10; fore wing marginal fringe length 4; gaster length 61; gaster width 39. Male. Unknown. Hosts . Unknown. Distribution. Costa Rica . Material examined. Type material. Holotype ♀ “ COSTA RICA : Puntarenas , Buenos Aires , Cerro Frantzius , 2134m , 12.iii-12. iv.2001 , D. Rubí , MT, LS 574800_334750, #62125” ( NHMUK ). Etymology. From the Latin caelatus = engraved, referring to the engraved sculpture on mesoscutellum. Comments . This species has some odd features for a Closterocerus : a long postmarginal vein, radial cell hairy, but since it has a flattened antenna and infuscate pattern in fore wing it is provisionally placed here.