Foenobethylus bidentatus Várkonyi & Polaszek, 2007

Várkonyi, Gergely & Polaszek, Andrew, 2007, Rediscovery and revision of Foenobethylus Kieffer, 1913 (Hymenoptera, Bethylidae), Zootaxa 1546, pp. 1-14 : 6-7

Foenobethylus bidentatus Várkonyi & Polaszek sp. nov.

(Figs. 4–7 and 20–22)

Description of Male Holotype.— Length of body 2.8 mm.

Head.— 1.13 times as long as wide, subquadrate in dorsal aspect, broadly rounded towards occipital carina. The distance from the eyes to the occipital carina equals the length of the eyes in dorsal aspect. Ocellar triangle forms a more or less right angle at the anterior ocellus. Lateral ocelli are placed slightly closer to anterior ocellus than the maximum diameter of the latter. Occipital carina at a distance from hind ocelli that is subequal to their maximum diameter. Surface of head finely coriaceous with sparse punctures. Length-to-width ratios of antennomeres: scape: 3.3, pedicel: 1.4, 1st flagellomere: 1.4, 5th flagellomere: 1.3. Terminal palpomere of maxillary palps over 4 times longer than wide.

Mesosoma.— With a length-to-depth ratio of 3.4 and length-to-width ratio of 2.2. Pronotum elongate and narrow anteriorly, with a narrow horizontal shelf protruding above base of propleuron. Length-to-width ratio of propodeal disc 1.3. Radius with a node in its basal 1/7. Metacarpus missing. Fore femur more slender than in the other species, with a length-to-width ratio of ca. 2.6. Hind trochanter without a ventral spine. Hind femur slightly flattened beneath, with two large teeth along its inner lateroventral edge.

Metasoma.— Eighth sternite with distal margin narrowly emarginate, centrally with dense setae. Subgenital plate with distal margin broadly and almost evenly emarginate, with long setae along its margin.

Male genitalia.— Distal part of parameres with long setae, central part narrow, almost stalk-like but with a dorsal swelling. Volsella with digitus small but clearly visible. Aedeagus as illustrated.

Colour.— Brown. First three antennomeres, palps, mandibles, tarsi, fore tibiae, mid and hind tibiae subbasally and apically yellow. Propodeal disc chestnut.

Etymology.— From Latin (bis meaning twice and denticulus meaning tooth). Named after the two large teeth on hind femora.

FIGURE 4–7. Foenobethylus bidentatus n. sp.: 4) dorsal aspect of head, 5) dorsal aspect of mesosoma, 6) lateral aspect of mesosoma, 7) ventrolateral aspect of hind trochanter and femur.