Euplectrus howelldalyi Hansson

Male. Length of body 2.0 mm. Antenna with scape yellowish-white with apex yellowish-brown, pedicel and flagellomeres 1–4 yellowish-brown, clava pale brown; scape slightly expanded and widest in apical part (Fig. 216), sensory pores confined to apico-ventral part, this area is yellowish-brown. Mandibles and palpi white. Head black and shiny, lower face predominantly white, (Fig. 214), pale area reaches almost to eyes. Frons close to eyes with one row of setae (Fig. 220). Vertex smooth (Fig. 221). Occipital margin with a strong carina behind ocellar triangle (Fig. 221). Mesosoma black and shiny (Fig. 213). Each sidelobe of mesoscutum with 13 setae. Scutellum 1.0× as long as wide; with strong engraved reticulation (Fig. 222). Dorsellum anteriorly with a narrow groove, medially 0.3× as long as length of dorsellum (Fig. 758). Propodeum smooth (Fig. 758); anteromedially with a semicircular cup; propodeal callus with seven setae. Legs yellowish-white (Fig. 213). Fore wing: costal cell with two rows of setae on ventral surface, and margin with four setae close to marginal vein; with 19 admarginal setae, in one row. Gaster with anterior ⅔ white with anterolateral margins dark brown, margin broken medially by white stripe, posterior ⅓ dark brown (Fig. 215). Ratios. HE/MS/WM = 2.1/1.0/1.3; POL/OOL/POO = 5.7/2.3/1.0; OOL/DO = 1.1; WE/WF/WH/HH = 1.0/1.9/3.8/2.7; LC/WS = 3.4; WH/WT = 1.2; PM/ST = 1.4; TS1/TS2/LT/LT1/LT2/LT3/LT4 = 3.6/2.5/6.7/2.5/1.3/1.0/1.5; LP/WP = 0.8; MM/LG = 1.1. Female. Unknown.

Costa Rica (Guanacaste Province).