Mesochorus ( Stictopisthus ) nemoralis ( SCHWENKE , 1999)

Mesochorus ( Stictopisthus) nemoralis ( SCHWENKE, 1999) (figs 10, 47, 65, 86)

O r i g i n a l: Stictopisthus nemoralis SCHWENKE, 1999: 30 , ♀ ³.

H o l o t y p e: ( ♀) “Dessau 4 SW-SSW 18.5.1993 100/93 H. Zoerner” (SDEI, Müncheberg), type examined.

syn. Mesochorus roccanus SCHWENKE, 1999: 59 , synonymized by RIEDEL (2019).

H o l o t y p e: (³) “I, VR, Garda Rocca, 100-250 m, 20.5.83 Haeselb.” (ZSM), type examined.

syn. nov. Stictopisthus madeirensis SCHWENKE, 1999: 31 , ♀ ³.

H o l o t y p e: ( ♀) “Madeira Machico V.82, ex Palpita unionalis via Choeras suffolkiensis”

(ZSM), type examined. D e s c r i p t i o n: ♀. Body length 3.0- 3.5 mm. Flagellum with 26-27 segments; 1st

flagellar segment 3.6-4.6× as long as wide and 0.50-0.70× as long as eye; 2 nd segment 2.6-2.8× and preapical segment 1.7-2.0× as long as wide. Temple roundly narrowed behind eye, dorsally 0.7-0.8× as long as eye. OED 1.4-1.8× and OOD 0.9-1.0× ocellar diameter. Frons almost smooth. Face with coarse and irregular transverse rugosepunctation, its width 1.2-1.3× combined length of face and clypeus and 1.1-1.2× eye length, with parallel sides. Clypeus impressed centrally, almost smooth. Mandible with two equal teeth. MI 0.4.

Mesosoma moderately to strongly depressed, 2.3-2.5× as long as high. Mesoscutum densely punctate. Scuto-scutellar groove slit-shaped, smooth. Mesopleuron coarsely and rather densely punctate ventrally; speculum smooth and shining. Metapleuron with fine rather dense punctures. Propodeum completely carinate, but area basalis and area superomedia confluent. Sides of area superomedia narrowed in apical half; costula reaching at its middle. Area petiolaris as long as wide or slightly wider than long. Hind femur 3.0- 3.3× as long as wide. Inner apical spur of hind tibia 0.65× as long as hind metatarsus. Hind claws without visible teeth. Areolet sessile frontally; vein 2m-cu reaching its middle. Vein 1cu-a strongly postfurcal by 0.8-1.0× its length; postnervulus intercepted slightly distad its middle. Pterostigma 2.4-2.7× as long as wide; distal part of metacarpus 1.0× as long as width of pterostigma. Hind wing with 4 distal hamuli; nervellus slightly inclivous.

1 st tergite 2.3-2.9× as long as wide; postpetiole coarsely aciculate or striate. 2 nd tergite 1.0-1.2× as long as wide. Thyridium transverse, comma-shaped. Ovipositor sheath 4.8- 5.2× as long as wide and 0.9-1.0× as long as hind metatarsus, not narrowed and slightly bent upwards apically.

Color: Black. Head reddish-brown or yellowish-brown; stemmaticum often and occiput brown to black. Mesoscutum blackish, with H-shaped central fuscous spot or four longitudinal fuscous stripes which are confluent frontally; side of pronotum, mesopleuron and metapleuron reddish-brown, mesopleuron sometimes blackish dorsally; mesosternum with blackish suffusion; propodeum blackish at anterior half, reddish-brown apically. 1 st tergite blackish; 2 nd tergite blackish, with large triangular yellowish spot in apical half; 3 rd tergite with narrow yellow basal band or yellow basally and centrally, brown apically; following tergites brown, with narrow yellowish or greyish apical margins. Legs reddish-brown; hind coxa brownish; hind femur brown or with brown suffusion; hind tibia cream yellow, brownish in apical 0.2-0.3 (1× tibial width); hind tarsus brown or blackish, metatarsus yellow in basal 2/3. Pterostigma brownish.

³. Body length 3.5-4.5 mm. Flagellum with 27-29 segments; 1 st flagellar segment 6.0× as long as wide and 0.60-0.63× as long as eye. Temple moderately narrowed behind eye, dorsally 0.7-0.8× as long as eye. OED 1.4-1.8× ocellar diameter. Facial width 1.1-1.2× combined length of face and clypeus and 1.1× eye length, with parallel sides. Mandible with two equal teeth.

Mesosoma moderately depressed, 1.9-2.1× as long as high. Mesoscutum densely punctate; mesopleuron with sparse to dense punctures. Propodeum completely carinate, but area basalis and area superomedia confluent. Hind femur 3.5-4.2× as long as wide. Areolet pointed or sessile frontally; vein 1cu-a strongly postfurcal by 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; 2 nd tergite black, with triangular or arched yellow spot in apical half; 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 0.1-0.2 (1.0-1.5× tibial width); hind tarsomeres yellowish, with ± brown tips. Pterostigma brown, pale yellow proximally and sometimes distally.

H o s t s: Carcina quercana (FABRICIUS, 1775) (Lep., Depressariidae ) (ZSM), Acleris forsskaleana (LINNAEUS, 1758) (Lep., Torticidae) (ZSM), Apanteles ( Choeras) dorsalis (SPINOLA, 1808) (Hym. Braconidae ) in Palpita vitralis (ROSSI, 1794) (Lep., Crambidae ) (EDI, ZSM).

R e m a r k s: This species is closely related to Mesochorus flavescens FONSCOLOMBE. It differs by a darker coloration of hind leg and pterostigma, stouter ovipositor sheath and transversely rugose-punctate face.

D i s t r i b u t i o n: West Palaearctic; examined material from Czech Republic *, Germany, Italy, Madeira.