Arna bipunctapex (Hampson)

Kim, Nang-Hee, Choi, Sei-Woong & Kim, Sung-Soo, 2019, One new species and one new record of lymantriine moths (Lepidoptera: Erebidae: Lymantriinae) in Korea, Journal of Species Research 8 (3), pp. 288-293 : 289

Arna bipunctapex (Hampson)

ņģƚğṣ나® (ljḍ) ( Figs. 1A , 2A )

Somena bipucntapex Hampson, 1891: 57 . TL: [Inida] Nilgiri.

Artaxa bipunctapex : Kirby, 1892: 453.

Aroa bipunctapex : Swinboe, 1892: 191.

Euproctis bipunctapex : Collenette, 1932: 60.

Nygmia bipunctapex : Swinhoe, 1922: 483.

Arna bipunctapex : Holloway, 1999: 46.

Material examined. 1$, Chopyeong-gil, Gunoe-myeon, JN: Wando, N34°21 ʹ 38.30 ʺ E126°39 ʹ 51.93 ʺ, 77 m, 5.Ⅹ Ⅰ.2015. SS Kim.

Diagnosis. Distinguished by the relatively large wingspan (27 mm) with two black dots in the apical region of the forewing. Head with pectinate female antennae with short pectinations, broad and yellowish frons and porrect and long (about twice the eye diameter) labial palpi. Forewing ground color light yellow-brown, tinged with brown scales on the central fascia and a postmedian, and apical region with two black dots. Hindwing ground color light yellow tinged with brown scales. Female genitalia ( Fig. 2A ). Papillae anales broad with rounded outer margin; anterior apophyses almost equal length to posterior apophyses; antrum U-shaped, basally flat, with digitate arms laterally; ductus dursae long, twice the corpus bursae; and corpus bursae ovate without signum.

Distribution. Korea, Japan, China, Thailand, India, Nepal, Malaysia, Singapore.

Remarks. Worldwide, 12 species of Arna have been described. Arna larvae feed on Sepium, Terminalis , Shorea , and Caerya ( Holloway, 1999). Up to now, two species of Arna are known in Korea: A. pseudoconspersa (Strand, 1914) and A. bipunctapex . These two species are similar in the shapes of their central fascia and the two black apical dots on the forewing. A. bipunctapex can be distinguished from A. pseudoconspersa by the presence of a small dot between two blackish dots in the apical region of the forewing. The male genitalia of A. bipunctapex can be distinguished from those of A. pseudoconspersa by the absence of a process on the sacculus of valva in A. bipunctapex ( Wang et al., 2010; 2011). The female genitalia of A. bipunctapex can be distinguished from those of A. pseudoconspersa ( Fig. 2B ) by the shape of the antrum, basally flat with two lateral digitate arms in A. bipunctapex .

Figures

Fig. 1. Adults of two new Lymantriine species from Korea. Scale bar=10 mm.A. Arna bipunctapex(Hampson), B. Euproctis fulvatus sp. nov.

Fig. 2. Male and female genitalia of four Lymantriine species from Korea. A-C. Female genitalia, D-F. Male genitalia. A. Arna bipunctapex (Hampson), B. Arna pseudoconspersa (Strand), C-E. Euproctis fulvatus Choi and Kim sp. n. F. Euproctis wilemani Collenette (from Wang et al., 2010).