Mesochorus ( Stictopisthus ) dilutoides, Riedel, 2025

Mesochorus ( Stictopisthus) dilutoides nom. nov. (figs 3, 19, 40, 57)

O r i g i n a l: Stictopisthus dilutus SCHWENKE, 1999: 30 , ♀, in Mesochorus preoccupied by RATZEBURG, 1844.

H o l o t y p e: ( ♀) “34.12, Türkei [ Turkey], Cukorova Citrus -Plant.” (ZSM), type examined.

D e s c r i p t i o n: ♀. Body length 2.8-3.5 mm. Tips of flagella broken off; 1 st flagellar segment 3.8-4.0× as long as wide and 0.50-0.56× as long as eye; 2 nd segment 3.5× as long as wide. Temple moderately and roundly narrowed behind eye, dorsally 0.7× as long as eye. OED 1.6-1.8× ocellar diameter. Face coarsely and densely punctate, its width 1.2-1.3× combined length of face and clypeus and 1.1-1.2× eye length, sides slightly convergent ventrally. MI 0.6-0.7, finely striate.

Mesosoma moderately depressed, 2.0-2.2× as long as high. Mesoscutum densely punctate, shining. Mesopleuron densely or rather densely and coarsely punctate. Propodeum completely carinate, but area basalis and area superomedia confluent. Area superomedia short; costula reaching at its middle. Area petiolaris hexagonal, about as long as wide. Hind femur 2.9-3.2× as long as wide. Areolet shortly sessile frontally. Vein 1cu-a strongly postfurcal by about its length. Pterostigma 2.9× as long as wide. Distal part of metacarpus 0.7-0.9× as long as width of pterostigma.

1 st tergite 2.3-2.5× as long as wide, postpetiole striate. 2 nd tergite 0.8-0.9× as long as wide. Ovipositor sheath slender, 6.9-7.2× as long as wide and 1.0-1.1× as long as hind metatarsus, almost bare and strongly narrowed in apical half.

Color: black. Head yellowish; face and occiput brownish. Basal flagellomeres yellowish. Mesosoma brownish; sometimes pronotum reddish and mesoscutum with H-shaped central red spot. Propodeum in basal 2/3 blackish. 1 st tergite dark brown, basally and apically yellowish; 2 nd tergite yellow, with brownish fronto-lateral spots; 3 rd tergite yellowish at base and brownish in apical third; following tergites brownish and slightly vespoid. Ovipositor sheath black. Legs brownish-yellow; hind coxa and hind femur with ± fuscous suffusion; hind tibia yellow, fuscous in apical 0.15-0.2 (0.7-1.0× tibial width). Pterostigma hyaline.

Ô unknown.

D i s t r i b u t i o n: Only known from Turkey.