A review of the subgenus Delineatia Volynkin & Huang, 2019 of the genus Ammatho Walker, 1855, with descriptions of two new species from Taiwan and Vietnam (Lepidoptera, Erebidae, Arctiinae, Lithosiini) Volynkin, Anton V. Wu, Shipher Zootaxa 2020 2020-06-18 4801 2 237 250 BFJTM Volynkin & Wu Volynkin & Wu 2020 [151,761,1413,1440] Insecta Erebidae Ammatho GBIF Animalia Lepidoptera 9 246 Arthropoda species trangchim sp. nov. Delineatia  ( Figs 17, 18, 29, 34)  urn:lsid:zoobank.org:act: D7970D67-72AE-46DF-BBCA-F9AEC0AB73AB   Type material.   Holotype( Figs 17, 29): male, “  III.2014, Central Vietnam, Thua Thien-Hue Province, Annamite Mts, Bach Ma Mt.,  1400m, leg. local collectors”, slide ZSMArct. 2019-699 Volynkin(Coll. MWM/ ZSM).    Paratypes.  VIETNAM: 1 female, the same data as in the holotype, slide ZSM Arct. 2019-700 Volynkin(Coll. MWM/ ZSM);  6 females, the same data (Coll. CAV).   Diagnosis.Forewing length is 15 mmin the holotypemale and 16–18 mmin females. The new species can be easily distinguished externally from its closest relative  A. sublucanaby its broader forewing, pale candy body coloration (in  A. sublucanathose are intense crimson), pale candy forewing ground color with pale candy cilia (in  A. sublucanathe forewing is intense crimson with black cilia), pale red hindwing ground color and cilia (in  A. sublucanathe forewing is crimson with cilia black at apex and crimson along outer and anal margins), and slightly shorter radial strips in the postmedial area of forewing. Compared to members of the  A. delineatiaspecies-group,  A. trangchim  sp. n.can be recognized by its paler crimson coloration, evenly crimson cilia of both wings, and thinner postmedial line and radial strips in the postmedial area. The male genitalia of  A. trangchim  sp. n.differ from those of  A. sublucanaby their slightly shorter but medially broader uncus, slightly less elongated valva, longer and narrower apical thorn of the distal costal process directed more dorsally (in  A. sublucanathat is shorter and broader and directed distally), the well-developed trigonal subapical thorn of the distal costal process (in  A. sublucanathat is present as a short smooth protrusion), more angular distal end of the broad setose section of sacculus (in  A. sublucanathat is smoothly rounded), more massive distal saccular process, aedeagus being slightly more broadened distally, and more elongated and narrowed tip of the medial conical diverticulum (in  A. sublucanathat is shorter and broader). The female genitalia of  A. trangchim  sp. n.are similar to those of  A. sublucanabut differ by the narrower, crescent-shaped postvaginal plate (that is narrowly semilunar in  A. sublucana), shorter and posteriorly broader, wineglass-shaped antrum (that is narrowly conical in  A. sublucana), and slightly shorter spinulose area in the posterior section of corpus bursae.   Distribution. Central Vietnam( Thua Thien-Hue Province: Annamite Range).   Etymology. TrangChim is the moon goddess in the traditional Vietnamese mythology. 2640455349 2014-03 ZSM, MWM Vietnam 1400 Volynkin 9 246 1 Thua Thien-Hue holotype 2640455333 [199,1081,1621,1649] ZSM Vietnam 9 246 1 1 paratype 2640455387 MWM, ZSM Vietnam Volynkin 9 246 1 paratype 2640455328 [317,739,1658,1685] CAV Vietnam Volynkin 9 246 6 6 paratype