Monoblastus, Hartig, 1837

Choi, Jin-Kyung, 2023, A new species of the genus Monoblastus Hartig (Hymenoptera: Ichneumonidae: Tryphoninae) with a key to species from South Korea, Journal of Species Research 12 (4), pp. 321-325 : 322-323

Key to species of South Korean Monoblastus

(modified Kasparyan et al., 2018) 1. Hind tibia light yellow with blackish base and apex. Antenna with about 40 flagellomeres. Metasomal tergites black with hind margin narrowly reddish. Nervellus intercepted above or near the middle. Fore and mid coxae and all trochanters blackish brown. Metasoma black······························································ M. clauseni

- Hind tibia colouration not as above; if yellow then darkened only at apex. Antenna with about 20 - 33 flagellomeres. Nervellus intercepted below the middle. Fore and mid femora reddish yellow, all trochanters and trochantelli and hind tibia (except for blackish apex) light yellow ·············································································2

2. Apical tergites of metasoma completely ochreus-red, tergites 1 - 3(4) black. Fore and mid femora posteriorly with blackish markings. Oral carina high and short; occipital carina joining oral carina close to mandible ································································ M. erythrurus

- Apical tergites of metasoma brown or black. Fore and mid femora completely yellowish, without posterior dark markings ····························································· 3

3.Tergites 2 - 3 predominantly reddish in female and predominantly blackish with reddish pattern at base and apex in male ······································ M. koreensis

- All tergites black in both sexes ·································· 4

4. Head with dense and coarse punctures. Dorsal area of antenna dark brown and ventral area yellow. Tarsal claws with 3 - 4 strong teeth. Fore leg completely yellow························································· M. nigriventus

- Head with dense and distinct but not coarse punctures. Dorsal area of antenna black and ventral area dark brown. Tarsal claws simple, not pectinate ( Fig. 1J ). Fore leg yellow except coxa dark brown to black and femur yellowish brown ········ M. forsythia sp. nov.

Figures

Fig. 1. Monoblastus forsythia sp. nov. (Holotype) A. Habitus in lateral view; B. Ovipositor and ovipositor sheath; C. Apical ovipositor and ovipositor sheath; D. Head in frontal view; E. Head in dorsal view; F. Mesopleuron; G. Wings; H. First metasomal tergite in lateral view; I. Propodeum; J. Hind fifth tarsus and tarsal claw. Scale bars:A, G, 1.0 mm; B, D, E, F, H, I, 0.2 mm; C, J, 0.1 mm.