Mesochorus illustris SCHWENKE, 1999

Riedel, Matthias, 2018, The types of Mesochorus GRAVENHORST (Hymenoptera, Ichneumonidae, Mesochorinae) described by W. SCHWENKE and deposited in the Senckenberg Deutsches Entomologisches Institut, Beiträge Zur Entomologie = Contributions to Entomology 68 (1), pp. 1-29 : 9

14. Mesochorus illustris SCHWENKE, 1999

( Figs 13a–c )

Holotype: "() Stiege 1.5 SO Harz 15.5.1988 37/88 H. Zoerner " [, no. 37/88, Germany: Saxony-Anhalt, Harz Mountains , 1.5 km SE of the district Stiege of town Oberharz, 15.5.1988, leg. K.H. Zoerner] ( SDEI).

Description: Missing: Head with antennae. Body length 3.2 mm. Mesoscutum coarsely and densely punctate; mesopleuron with coarse dense punctures dorsally and coarse but scattered punctures ventrally; metapleuron with superficial punctures. Area basalis almost rectangular, 1.5x longer than wide; area superomedia 2.3x longer than wide and 1.7x longer than the area petiolaris, costula in frontal 4/10 of length of area superomedia; area petiolaris ca. 0.9x as long as wide. Hind femur 5.5x longer than wide; hind metatarsus 0.47x as long as the hind tibia; hind claws with two basal teeth. Areolet shortly sessile, 2 nd recurrent vein proximal to its middle; nervulus interstitial; pterostigma 3.5x longer than wide, radial vein in its distal 0.6. 1 st tergite 3.0x longer than wide; postpetiolus 1.5x longer than wide, with central rim; 2 nd tergite 1.4x longer than wide; thyridium roundish. Stylet stabshaped, not distinctly clubbed apically, 1.3x longer than the 2 nd hind tarsomere.

Colour: Black. Pronotum and mesopleuron brownishred; hind edge of pronotum, tegula and wing base yellow; metapleuron brownish; mesoscutum blackish, with reddish central spot; scutellum reddish. Metasoma black; 2 nd tergite with narrow yellow apical margin. Legs yellowish. Pterostigma hyaline.

Remark: The species is correctly placed in the key of the

curvulus -group ( SCHWENKE, 1999: 35–37).

Figures

Fig. 13a-c: Holotype of Mesochorus illustris SCHWENKE: a. mesosoma; b. stylet; c. metasoma.