Mesochorus ( Stictopisthus ) flavescens FONSCOLOMBE , 1852

Mesochorus ( Stictopisthus) flavescens FONSCOLOMBE, 1852 (figs 4, 41, 53, 58, 82)

H o l o t y p e: (Ô)“ Mesochorus flavescens nob” (Paris), photos of type [MNH Paris] studied.

syn. Mesochorus pungens SCHWENKE, 1999: 58 , synonymized by RIEDEL (2018).

H o l o t y p e: (Ô) “Dessau-Anh. 117/88 4.7. leg. Zoerner” (SDEI, Müncheberg), type examined. syn. nov. Stictopisthus hispanicus SCHWENKE, 1999: 32 , Ô.

H o l o t y p e: (³) “El Soldado, Sierra Morena, 26.7.26, Seyrig” (Paris), photos of type [MNH

Paris] studied. D e s c r i p t i o n: ♀. Body length 3.0- 3.5 mm. Flagellum with 24-26 segments; 1st

flagellar segment 3.7-4.3× as long as wide and 0.50× as long as eye; 2 nd segment 3.0× and preapical segment 1.5-1.7× as long as wide. Temple moderately and roundly narrowed behind eye, dorsally 0.6-0.7× as long as eye. OED 1.4-1.8× ocellar diameter. Frons and occiput with sparse punctures. Face coarsely punctate, its width 1.3-1.4× combined length of face and clypeus and 1.1-1.2× eye length, with ± parallel sides. Mandible with two equally sized teeth, sometimes upper tooth slightly larger. MI 0.4-0.6.

Mesosoma strongly depressed, 2.2-2.3× as long as high. Mesopleuron with coarse but sparse punctures ventrally, shining. Metapleuron with slightly denser punctures, shining. Pronotum almost smooth. Propodeum completely carinate, but area basalis and area superomedia confluent. Area petiolaris wider than long. Hind femur 2.9-3.1× as long as wide. Areolet sessile or pointed frontally. Vein 1cu-a strongly postfurcal by 0.7-1.0× its length. Pterostigma 2.8× as long as wide. Apical part of metacarpus long, about as long as width of pterostigma.

1 st tergite 2.3-2.7× as long as wide; postpetiole coarsely striate or aciculate. 2 nd tergite 0.9× as long as wide. Thyridium comma-shaped, transverse. Ovipositor sheath densely pilose, stout, 5.6-6.2× as long as wide and about as long as hind metatarsus, slightly narrowed apically.

Color: black. Head reddish-yellow; occiput brownish. Two to three basal flagellomeres yellow, flagellum otherwise ochreous. Pronotum and mesopleuron reddish; mesoscutum brownish, with H-shaped central reddish mark or reddish with brownish lateral stripes and fronto-medial spot; scutellum, propodeum and metapleuron blackish. 1 st tergite black, sometimes 1 st sternite dark reddish. 2 nd tergite yellow, basolateral with dark brown medially confluent stripes; 3 rd tergite yellow, brownish laterally; following tergites yellowish-brown basally and yellowish apically. Legs reddish-yellow; hind tibia pale yellow, at narrow base and apical 0.1-0.2 (0.5-1.0× tibial width) ± brownish. Pterostigma hyaline or pale ochreous, with slightly darker margins.

³. Body length 3.5-4.5 mm. Flagellum with 27-29 segments; 1 st flagellar segment 5.9- 6.0× as long as wide and 0.60-0.63× as long as eye; 2 nd segment 4.1× and preapical segment 2.2× as long as wide. Temple moderately narrowed behind eye, dorsally 0.7-0.8× as long as eye. OED 1.4-1.8× and OOD 0.9× ocellar diameter. Occipital carina complete medially. Width of face 1.1-1.2× combined length of face and clypeus and 1.0-1.1× eye length, with parallel sides. Mandible with two equal teeth.

Mesosoma slightly or moderately depressed, 1.8-2.1× as long as high. Mesoscutum densely punctate. Mesopleuron with rather dense to dense punctures. Scuto-scutellar groove smooth. Propodeum completely carinate, but area basalis and area superomedia confluent. Hind femur 3.5-4.2× as long as wide. Areolet pointed to sessile frontally; vein 1cu-a strongly postfurcal by 0.5-0.8× its length. Pterostigma wide, 2.3-2.5× as long as wide. Distal part of metacarpus long, length 1.0× width of pterostigma.

1 st tergite 2.6-2.8× as long as wide; postpetiole coarsely aciculate. 2 nd tergite 0.9-1.0× as long as wide. Thyridium comma-shaped, at base of tergite. Stylet long, stick-shaped or slightly clubbed apically, 1.4-1.8× as long as 2 nd hind tarsomere.

Color: Head yellow. Palps, gena, mandible (except teeth), face, frontal margin and hind edge of pronotum, tegula, wing base, and fore and mid coxae and trochanters cream-yellow. Flagellum yellow basally, ± infuscate distally. Mesosoma reddish-yellow; mesoscutum with two brownish to blackish lateral stripes and blackish fronto-median spot; propodeum black in frontal 1/2-2/3. 1 st sternite dark reddish; 1 st tergite black, sometimes reddish basally; 2 nd tergite black, with triangular or arched yellow spot in apical ½; 3 rd tergite brown, with tongue-shaped yellow spot in basal 2/3; following tergites brown or vespoid. Legs yellow, hind femur with brownish suffusion apically, hind tibia cream-yellow, brownish in apical 0.15-0.2 (1.0-1.5× tibial width); hind tarsomeres yellowish, with ± brown tips. Pterostigma brown, pale yellow proximally and sometimes distally.

R e m a r k s: The correlation of sexes was confused by SCHWENKE (1999) who described the stylets (e. g. parameres) of ³ as apically pointed, but the parameres are stick-shaped and slightly clubbed apically (see photos of HT from Mus. Nat. Hist. Naturelle/Paris). It should be noted here that all known European ³³ with apically pointed parameres belong to Mesochorus unicinctor (THUNBERG) .

D i s t r i b u t i o n: West Palaearctic; examined material from Belgium *, Bulgaria, Corsica *, Czech Republic ( Moravia)*, Germany, Greece *, Poland *.