Dimophora parva, Omatsu & ---, 2023

Omatsu, Yuji & Kazuhiko Konishi, 2023, Revision of the genus Dimophora Förster (Hymenoptera: Ichneumonidae: Cremastinae) from Japan, Zootaxa 5278 (3), pp. 537-554 : 549-551

Dimophora parva n.­­­sp.

Figs 25–31, 39

♀: Head (Figs 25, 26) 1.2–1.3 times as wide as long; POL/OD=1.8, OOL/OD=1.3–1.4, width of temple/OD=1.7– 1.8; face 1.9–2.0 times as wide as long; clypeus 1.4–1.7 times as wide as long; tentorial pit located on the ventral part of lower margin of eye; malar space 0.6–0.8 as long as basal mandibular width; antenna with 24 flagellomeres, 1st flagellomere as long as 2nd, which 3.2–3.8 times as long as wide.

Mesosoma (Fig. 27) 1.6 times as long as high; mesoscutum 1.0 times as long as wide; scutellum as long as wide; propodeum (Fig. 30) with area superomedia 0.5 times as long as area petiolaris, posterior 1/3–1/2 of lateral longitudinal carina in area dentipara absent.

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Wings. Fore wing (Fig. 28) 2.4–2.5 mm long, 2.6 times as long as wide; 2rs-m 0.6 times as long as 3rs-m; 1st abscissa of vein M as long as 2nd; areolet 0.6–1.0 times as long as wide; stigma 2.5 times as long as wide; sub-basal cell entirely covered with setae. Hind wing (Fig. 29) with 5 distal hamuli; sub-basal cell entirely covered with setae; 2nd abscissas of CU and AA absent.

Legs (Fig. 27). Fore tibial spur 0.3 times as long as 1st tarsomere, which 7.5–8.8 times as long as wide; Hind tibia 1.0–1.1 times as long as 1st tarsomere. Hind femur 4.4 times as long as high.

Metasoma (Fig. 27). T1 2.4–2.9 times as long as apical wide, 1.3–1.4 times as long as T2; petiole 2.0–2.9 times as long as wide; postpetiole 1.1–1.2 times as long as wide; T2 1.0–1.1 times as long as wide. Ovipositor length 1.1mm long, 2.2 times as long as hind 1st tarsomere.

Color. Head black; mandible brown except teeth; apical half of clypeus brown; apical margin of malar space brown; face along eye margin brown in one specimen; antenna dark brown except 7th to 11th flagellomeres whitish yellow. Mesosoma black; tegula brownish yellow. Fore and mid legs brownish yellow; 5th tarsomeres dark brown. Hind leg yellowish brown, darker dorsally. Wings hyaline and tinged with pale brown; veins pale brown; stigma brown. Metasoma dark brown; around basal 1/3 and apical 1/5 of T1 , basal and apical portions of T2 and T3 tergites reddish brown; 1st sternite brownish yellow. Ovipositor black.

♂: Unknown.

Type­­­ series.­­­ Holotype. ♀. “ 33°57 ‘28”N 134°25’ 10” E Ôkawara, Sanagouchi-son, Tokushuima, Shikoku, JAPAN, 4–7. vii, 2016, Malaise trap, K. Ôhara ” ( EUM) . Paratype. ­­­ Same locality, 1♀ (22–28. vii, 2016, MsT.), K. Ôhara ( EUM) .

Distribution.­­­ Japan (Shikoku) (Fig. 39)

Etymology.­­­ The specific name is from very small size.

Remarks.­­­ This species resembles D. evanialis in its small body size and shares a female antennal color pattern (Fig. 27) with one of the variations in D. evanialis . However, in this species, OOL is 1.3–1.4 times as long as OD, POL is 1.8 times as long as OD (Fig. 25), width of temple is 1.7–1.8 times as long as OD, face is 1.9–2.0 times as wide as long and posterior 1/3–1/2 of lateral longitudinal carina in area dentipara of propodeum is absent (Fig. 31). While in D. evanialis, OOL is 1.7 times as long as OD, POL is 1.1 times as long as OD (Fig. 33), width of temple is 1.1 times as long as OD, face is 2.4 times as wide as long and lateral longitudinal carina in area dentipara of propodeum is distinct (Fig. 32).