Cercobelus epimetheus, Noyes, 2023

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 : 609-610

Key to Costa Rican species of Cercobelus

(Females and males)

1. Clava 3-segmented (e.g. Figs 1626, 1642, 1659, 1670) (females) ..................................2

- Clava entire (e.g. Figs 1631, 1643, 1652, 1664) (males) .............................................. 11

FEMALES

2 (1) Antenna (Figs 1626, 1640, 1655, 1656) with F1 without linear sensilla, at least a little shorter than F2 ..................................................................................................... 3

- Antenna (Figs 1659, 1670, 1678, 1680, 1685, 1693) with F1 with linear sensilla, at least as long as F2 ......................................................................................................... 5

3 (2) Fore wing (Fig. 1627) completely hyaline; syntergum (Fig. 1634) with numerous, dense pegs on apex, rasp-like .............................................. epimetheus sp.nov. (p. 611)

- Fore wing (Figs 1635, 1650) with a distinct infuscate area around stigmal vein; syntergum (Fig. 1653) not apically rasp-like ......................................................................... 4

4 (3) Hind tibia dark brown with a well-defined, basal, white band; scape (Figs 1640-1642) more than 4X as long as broad; antennal pedicel at least 1.8X as long as broad; hypopygium (Figs 1645, 1646) completely longitudinally divided medially, about as long as broad with slender, anterior apodemes long and slender ....................... ....................................................................................... adrastea sp.nov. (p. 613)

- Hind tibia entirely brown without a well-defined, basal, white band; scape (Figs 1655, 1656) less than 4X as long as broad; antennal pedicel not more than 1.6X as long as broad; hypopygium (Figs 1648, 1649) transverse, only partially longitudinally divided medially, at least 1.5X as broad as long and without slender anterior apodemes ............................................................ isara Noyes & Hanson (p. 614)

5 (2) Antenna (Figs 1559, 1670, 1678) with F4 transverse or subquadrate, less than 1.2X as long as broad ........................................................................................................ 6

- Antenna (Figs 1680, 1685, 1693; Hab. 251) with F4 at least 1.2X as long as broad ..... 8

6 (5) Apical half of fore wing (Fig. 1662) with a distinct elongate, infuscate, wedge-shaped area ..................................................................... sithon Noyes & Hanson (p. 615)

- Apical half of fore wing (Figs 1672, 1675) generally very weakly infuscate or hyaline .. ...............................................................................................................................7

7 (6) Fore wing with marginal vein punctiform (Fig. 1671), not longer than broad; spiracle on propodeum relatively small and separated from anterior margin by about its own diameter; hind tibia dark brown with a well-defined, white, basal band ............... ........................................................................................ pleiades sp.nov. (p. 616)

- Fore wing with marginal vein more than 1.5X as long as broad (Fig. 1676); spiracle on propodeum large and separated from anterior margin by about 0.3X its own diameter; hind tibia entirely brown without a well-defined white band ................. ........................................................................................ tartarus sp.nov. (p. 617)

8 (5) Fore wing with marginal vein (Fig. 1681) about 5X as long as broad .............................. ............................................................................ ulixes Noyes & Hanson (p. 619)

- Fore wing with marginal vein (Figs 1689, 1691; Hab. 251) punctiform, not longer than broad .................................................................................................................... 9

9 (8) Fore wing (Fig. 1688) hyaline with only a small infuscate area adjacent to stigmal vein; hind wing about 3X as long as broad................................ phanes sp.nov. (p. 620)

- Fore wing (Fig. 1691; Hab. 251) with infuscate area extending at least half way across wing below stigmal vein; hind wing more than 3.5X as long as broad ..............10

10 (9) Scape and flagellum concolourous amber-testaceous; width of head equal to length of pedicel and flagellum combined; fore and mid femora mostly dark brown; propodeum with submedian, longitudinal carinae .................................................. ........................................................................ godoyae Noyes & Hanson (p. 621)

- Scape pale orange, clearly paler than brown flagellum; width of head less than length of pedicel and flagellum combined; fore and mid femora mostly pale orange; propodeum with a single median longitudinal carina ............................................. .......................................................................... daphne Noyes & Hanson (p. 622)