Mesochorus ( Stictopisthus ) bilineatus THOMSON , 1886

Mesochorus ( Stictopisthus) bilineatus THOMSON, 1886 (figs 1, 25, 34, 38, 55)

O r i g i n a l: Mesochorus ( Stictopisthus) bilineatus THOMSON, 1886: 344 .

Lectotype: (³) “ bilineatus ” (Lund), type not examined.

syn. nov. Stictopisthus sacromontis SCHWENKE, 1999: 30 .

H o l o t y p e: ( ♀) “Italia-Piemonte AL Sacro Monte di Crea, T.M. 29.VII.1986 Scaramozzino P.L.

leg.” ( ZSM), type examined. D e s c r i p t i o n: ♀. Body length 2.5-4.0 mm. Flagellum with 20-24 segments ; 1st

flagellar segment 3.2-3.6× as long as wide and 0.4-0.5× as long as eye; 2 nd segment 2.3- 2.8× and preapical segment c. 2× as long as wide. Temple moderately narrowed behind eye, dorsally 0.7× as long as eye. OED 1.4-1.8× and OOD 1.6× ocellar diameter. Occipital carina complete medially. Frons with very fine transverse granulation. Face coarsely punctate, with ± distinct transverse striation, its width 1.2-1.3× combined length of face and clypeus and 1.0-1.1× eye length, lateral margins convergent ventrally. Mandible with two equally sized teeth. MI 0.7-0.8.

Mesosoma moderately depressed, 1.9-2.0× as long as high. Mesoscutum densely punctate, shining. Mesopleuron and metapleuron densely and coarsely punctate. Scuto-scutellar groove smooth. Propodeum completely carinate, but area basalis and area superomedia confluent. Area superomedia 2.0× as long as wide; costula reaching at its middle. Area petiolaris hexagonal, slightly as long as wide. Hind femur 3.0-3.1× as long as wide. Inner apical spur of hind tibia 0.62× as long as hind metatarsus. Hind claws without visible teeth. Areolet sessile frontally; vein 2m-cu reaching ± proximad its middle. Vein 1cu-a strongly postfurcal by 0.5-0.8× its length. Postnervulus intercepted in its middle. Pterostigma 3.1× as long as wide. Anterior margin of radial cell 0.9× as long as pterostigma; distal part of metacarpus very short or entirely absent. Hind wing with 4 distal hamuli.

1 st tergite 2.1-2.4× as long as wide; postpetiole ± strongly aciculate. 2 nd tergite 0.7-0.9× as long as wide. Ovipositor sheath 6.0-7.1× as long as wide and 0.9-1.0× as long as hind metatarsus, slightly narrowed in apical 0.2, with long setae.

Color: black. Clypeus, face, frons, gena, temple, tegula and subtegular ridge yellow; stemmaticum and occiput, and sometimes frons medially brown to black. Flagellum yellow, fuscous apically. Mesosoma black; pronotum brownish, with wide yellowish margins; mesoscutum with yellow stripes laterally and sub-medially, confluent frontally. Scutellum yellowish or reddish, with baso-central fuscous spot. 1 st tergite black, often with yellowish spot or band apically; 2 nd tergite black, yellow in the apical 0.3-0.4; 3 rd tergite brown, yellowish in the basal 0.5-0.7; following tergites brown with narrow yellowish apical margins. Ovipositor sheath black. Pterostigma hyaline to ochreous. Legs yellowish; hind coxa reddish or brownish; hind femur sometimes with diffuse brownish suffusion; hind tibia narrowly black at base and narrowly infuscate apically; hind metatarsus narrowly brown at apex.

³. Body length 3.5-4.0 mm. Flagellum with 21-24 segments; 1 st flagellar segment 3.9× and 2 nd segment 2.9× as long as wide. OED 1.3-1.5× and OOD 1.5-1.7× ocellar diameter. Face width 1.2× combined length of clypeus and face and 1.0-1.1× eye length. Mesosoma 1.7-1.9× as long as high. Mesopleuron densely punctate. Hind femur 3.7-3.8× as long as wide. Vein 1cu-a strongly postfurcal by 0.5-1.0× its length. Area basalis and area superomedia confluent; costula weak. Area petiolaris wider than long. 1 st tergite 2.3× as long as wide; postpetiole coarsely aciculate. 2 nd tergite 0.8-0.9× as long as wide. Stylet 1.1-1.5× as long as 2 nd hind tarsomere, distinctly clubbed apically.

Color: Pronotum yellow-red, blackish laterally. Mesopleuron sometimes reddish-brown. Hind tibia narrow at base and apex brownish. Hind tarsus ± brownish. Color otherwise as in ♀.

D i s t r i b u t i o n: Transpalaearctic; examined material from Bulgaria *, France, Italy, Kazakhstan *, Mongolia *, Russia * ( Volgograd district), Turkey *.