Arrhenophagus, Aurivillius, 1888

Noyes, John Stuart, 2023, ENCYRTIDAE OF COSTA RICA (HYMENOPTERA: CHALCIDOIDEA), 4 Subfamily Encyrtinae: tribes Arrhenophagini, Habrolepidini, Cerapterocerini, Cheiloneurini, Trechnitini, Cercobelini, Polaszekiini, Protyndarichoidini, Gahaniellini and Syrphophagini (part), mainly primary parasitoids and hyperparasitoids of Coccoidea and Psylloidea (Hemiptera), Taxonomic Monographs on Neotropical Hymenoptera (Oxford, England) 2 (11), pp. 1-921 : 29

Key to Costa Rican species of Arrhenophagus

(Females)

1. Head in facial view ( Fig. 10) clearly higher than broad, with clypeal margin strongly emarginate at base of each mandible; truncate surface of clava ( Fig. 9) less than 0.6X as long as ventral surface of clava ............. chionaspidis Aurivillius (p. 29)

- Head in facial view as broad as high ( Fig. 11), with clypeal margin hardly emarginate at base of each mandible; truncate surface of clava ( Fig. 12) at least 0.8X as long as ventral surface of clava .................................................. albitibiae Girault (p. 30)