Mesochorus luminis 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 : 9-10

15. Mesochorus luminis SCHWENKE, 1999

( Figs 14a–d )

Holotype: "() Wittenberg-Lu 10– 30.8.1964 Lichtfalle H. Zoerner " [, without no., Germany: Saxony-Anhalt, Lutherstadt Wittenberg, light trap, 10– 30.8.1964, leg. K.H. Zoerner] ( SDEI).

Description: Missing: One antenna completely (one antenna with 25 flagellomeres and without tips glued on needle), left wings. Body length 3.3 mm. Flagellum with more than 25 flagellomeres; 1 st flagellomere 6.8x longer than wide and 0.66x as long as the eye; 2 nd flagellomere 4.7x longer than wide. Temple strongly narrowed behind eye, 0.4x as long as the eye width. Ocelli very large, OOD 0.65. Face with coarse dense punctures, slightly convergent ventrally, 0.95x as wide as the length of clypeus+face and 0.75x as wide as the eye length. Clypeus smooth, with few coarse punctures. Facial orbit with transverse rugae, malar space striate. MI 0.2. Mandible with two equal teeth. Genal carina reaching the hypostomal carina far from mandibular base. Mesoscutum with scattered fine hair-punctures; mesopleuron with few fine punctures dorsally, almost smooth ventrally; metapleuron with fine scattered punctures. Areae basalis and superomedia confluent; area basalis trapezoid, as long as wide; area superomedia 2.1x longer than wide and 1.5x longer than the area petiolaris, costula in its middle; area petiolaris 1.15x longer than wide. Hind femur 4.5x longer than wide; hind metatarsus 0.45x as long as the hind tibia; hind claws without visible teeth. Areolet pointed, 2 nd recurrent vein slightly proximal to its middle; nervulus interstitial; pterostigma ca. 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, completely and strongly striate; 2 nd tergite 1.05x longer than wide; thyridium transversal-oval. Stylet spatula-shaped, strongly clubbed apically; 1.4x longer than the 2 nd hind tarsomere.

Colour: Flagellum yellow, slightly infuscate apically. Face reddish; palps, mandible except teeth, malar space, gena and facial orbit cream-yellow; orbits otherwise reddish. Mesosoma reddish; hind edge of pronotum, wing base and tegula cream-yellow; mesoscutum with two lateral and one fronto-medial brownish spots; propodeum brownish; mesopleuron ventrally and metapleuron reddish-brown. 1 st tergite red basally; 2 nd tergite yellow in the apical 2.5/10 of tibial length; 3 rd tergite mainly yellow, brownish apically; following tergites blackish. Legs yellow; hind tibia cream-yellow, brownish in the apical 1/10 of tibial length. Pterostigma hyaline.

Remark: This species cannot be identified with the keys published by SCHWENKE (1999) and is misplaced there. SCHWENKE included the taxon in the dispar- group, probably due to the striate postpetiolus, but the venation of fore wing in Mesochorus luminis SCHWENKE is untypical for this species-group. The holotype of M. luminis belongs to the pectoralis -group sensu SCHWENKE and runs to no. 30 ( Mesochorus pharaonis SCHWENKE ) in the key for males ( SCHWENKE, 1999: 115–118). However, the type of M. pharaonis has a completely different colour pattern. Although SCHWENKE (1999: 100) (erroneously) mentioned a smaller size of ocelli for Mesochorus provocator AUBERT males (which would run to no. 32 in his key), a comparison of the available material shows no relevant differences.

Valid name: Mesochorus provocator AUBERT, 1965

syn. nov. Mesochorus luminis SCHWENKE, 1999 .

Figures

Fig. 14a-d: Holotype of Mesochorus luminis SCHWENKE:a. face; b. mesosoma; c. stylet, d. postpetiolus.