Stethoncus sulcator Aubert

Broad, Gavin R. & Shaw, Mark R., 2005, The species of four genera of Metopiinae (Hymenoptera: Ichneumonidae) in Britain, with new host records and descriptions of four new species, Journal of Natural History 39 (26), pp. 2389-2407 : 2397-2398

Stethoncus sulcator Aubert

Female

Body length 4.0– 5.4 mm. Fore wing length 2.8–3.8 mm. Antenna with 22–27 flagellar segments, shortened and somewhat laterally compressed (measurements as for S. monopicida ), F1 0.71 times as long as wide (1.2 times in anterior view); F2 0.63; middle flagellomeres 1.00; penultimate flagellomeres 1.10. Mesoscutum (measured as for S. monopicida ) approximately (ca 0.95 times) as wide as long. Propodeum with the lateromedian longitudinal carinae widest apart at the mid-length of the area superomedia, the area superomedia noticeably narrowed basally and anteriorly. Black, but with mouthparts, tegulae and legs (except hind coxae) yellowish brown. Antennae yellowish brown but infuscate, especially on inner surfaces of flagellomeres. Pterostigma from dark brown to black, with proximal corner paler, strikingly so when pterostigma very dark. Otherwise similar to description of S. monopicida .

Male

Similar to female but with antennal flagellum slenderer (central segments slightly longer than wide) and with the pronotum not as wide (see illustrations in Aubert 1965). Body length 4.2–5.2 mm. Fore wing length 3.0– 3.7 mm.

Comment

Distinguished from S. monopicida by the characters given under the account of that species.

Material examined

France: 1♀, Lot-et-Garonne , Bernac, 12–25 July 1993, Malaise trap ( R. R. Askew) ( NMS) . 5♀♀, 5 „„, ‘‘59.101 Germany, Ruthe Coll., Stethoncus sulcator Aub. J.F. Aubert det.’’ ( BMNH) .

Biology

Unknown.