S. Mahunka szerk.: Folia Entomologica Hungarica 50. (Budapest, 1989)
The new species is known only from Vietnam, it occurs sympatrically with agnata in the northern part of the country. Ctenoplusia (Acanthoplusia) agnata (Staudinger, 1892) (Mém. Rom., VI: 547. - Plusia) Examined material: 3 males ( Ha Noi, military cemetery, S from the city, 18.1. 1986. leg. Mahunka and Oláh; 3 males, 1 female. Ha Noi, S from the city near Hong Song, 18. I. 1986, leg. Mahunka and Oláh; 1 male, Vinh Phu, Tam Dao, 1200 m, 20.1. 1986, leg. Mahunka and Oláh; 3 males, 1 female. Ha Noi, Quang Ba, Ho Tay, 7. V. 1987, leg. Mészáros, Oláh and Vásárhelyi. Slides Nos 2908, 3007 Ronkay (males). An eastern Palaearctic species expanding into the Oriental Region in SE China and at the Pacific Coast; it occurs sympatrically with the preceding species in N Vietnam. Ctenoplusia (Acanthoplusia* tarassota (Hampson, 19 13* (Cat. Lep. Phal., 13: 473. - Phytometra) Examined material: six females, Vinh Phu, Tam Dao, 1200 m, 20.1. 1986, leg. Mahunka and Oláh; 1 male, Da Lat, 1500 m, 14. X. 1988, leg. Mahunka, Oláh and Vásárhelyi; 1 male from same locality, 19. X. 1988, collected by the previous collectors. Slide No. 2790 Ronkay (female). An interesting montane forest species having the largest area from the taxa of this, mainly Indo-Australian subgenus. Plusia (s.l.) aeneofusa Hampson, 1894 (Moths Ind., II: 376. - Plusia) Examined material: a single male. Prov. Vinh Yen, Tam Dao, 840 m, 9.V. 1987, leg. Matskási, Oláh and Topái. Slide No. 2910 Ronkay. An unically modified species showing some virtual similarities with some of the members of the genera Ctenoplusia (phocea Hampson and phocina Dufay) , Thysanoplusia (bipartita Snellen) and Stigmoplusia (chalcoides Dufay, allocota Dufay and megista Dufay). Its characteristic morphological features are partly the same as those of the species of Acanthoplusia and some Ctenoplusia (s.l.) species but each of them appears in differently modified stage (see the double row of fixed, not removable setae on the ventral margin of v alva; the tubular, long vesica having only a terminal cornutus but with a distal diverticle similar to some species of Autographa; the inside hyaline sac of the vesica placed in the distal curve being far from the edge of aedeagus etc. (Figs 6-9)). It is almost certain that this species represents a distinct, monotypical genus, but for the correct interpretation of its phylogenetic connections further investigations are needed. Thysanoplusia reticulata (Moore, 1882) comb. nov. (Lep. Atk., p. 148. - Plusia) Examined material: 2 males, 1 female, Vinh Phu, Tam Dao, 1200 m, 20.1.1986, leg. Mahunka and Oláh; 3 males, 2 females, Vinh Phu, Tam Dao, 1200 m, S from the village, 21. I. 1986, leg. Mahunka and Oláh; 1 male, Prov. Vinh Yen, Tam Dao, 840 m, 9. V. 1987, leg. Matskási, Oláh and Topái; 1 female, Prov. Bac Thai, Quang Chu, 500 m, 24. V. 1987, leg. the previous collectors; 1 female. Da Lat, 1500 m, 14.X. 1988, leg. Mahunka, Oláh and Vásárhelyi. The separation of the groups of Trichoplusia (s.l.) is very problematic because of their overlapping characteristics and the high number of species known as Trichoplusia. According to Kitching (1987), in my opinion the ni-group ( Trichoplusia s. str. ) and the orichal- cea-group ( Thysanoplusia) are not monophyletic and these main lines should be separated on generic level. The genus Thysanoplusia was erected for the intermixta-group ( orichalcea and intermixta) , daubei (Boisduval) and ochreata by Ichinose (1973), from these four species only the first two can be considered as undoubtedly monophyletic. Later Holloway (1985) transferred two further taxa - bipartita (Snellen) and ekeikéi (Bethune-Baker) - to this genus. Kitching (op. cit. ) listed also florina (Guenee) and the species of the violascens group living in Madagascar as possible members of Thysanoplusia. Morphological evidences give the reason of interpretation as members of the genus Thysanoplusia not only the species of
