Chalcidid parasitoids (Hymenoptera: Chalcididae) of Opisina arenosella (Walker) (Lepidoptera: Xyloryctidae) on coconut palm in southern India Author Binoy, C. Independent researcher, Sreeragam, Chereekandy, Elathur, Kozhikode Kerala- 673303, India. Author Nivetha, S. 0009-0002-4102-911X sekarnivi25112000@gmail.com Author Arulprakash, R. 0009-0002-4102-911X sekarnivi25112000@gmail.com text Zootaxa 2024 2024-11-12 5537 4 493 510 http://dx.doi.org/10.11646/zootaxa.5537.4.3 journal article 10.11646/zootaxa.5537.4.3 1175-5326 14240326 26BA78B1-2B0D-4560-A393-1DC1C8E5342E Antrocephalus hakonensis (Ashmead, 1904) ( Figs 11–18 ) Material examined . Karnataka : 6♀ , 1♂ Coorg dt., Thalakavery , 27.xii.2019 , Coll. C. Binoy. Kerala : 11♀ , 4♂ Kozhikode dt., Elathur , Balussery , Pantheerankavu , 2018–2022, Coll. C. Binoy ; Tamil Nadu : All Coll. S. Nivetha , 5♀ , 8♂ Erode dt., Avalpoondurai , 01.xii.2023 ; 4♀ , 10♂ Karur dt., Pugalur , 13.xii.2023 ; 3♀ , 6♂ Tiruppur dt., Nathakadayur , 25.i.2024 . Diagnosis. Black; head in frontal view distinctly wider (1.3× excluding mandibles) than high ( Fig. 13 ); preorbital carinae joining with auricular carina and meeting with genal carina in the middle ( Fig. 13 , arrow); mesosoma sparsely punctate with small punctures, the interspaces smooth; scutellum distinctly longer than maximum width, and with conspicuous medio-longitudinal furrow ( Fig. 14 , arrow); axillae and sides of mesoscutum with tufts of silvery-white setae ( Fig. 14 ); metacoxa with dorsobasal tubercle; metafemur with inner basal tooth ( Fig. 17 , arrow). Female metasoma acuminate apically ( Fig. 15 ); male metasoma subglobose ( Fig. 18 ). Note . The specimens from Kerala have brown-black hind legs compared to entirely black specimens from Karnataka and Tamil Nadu .