Pachynoa xanthochyta (Turner, 1933)

Rao, B. S. K. & Sivaperuman, C., 2022, New records of pyraloid moths (Lepidoptera: Pyraloidea: Crambidae) from India, Zoosystematica Rossica (Zoosyst. Rossica) 31 (1), pp. 20-26 : 23-24

Pachynoa xanthochyta (Turner, 1933)

( Figs 1C , 2F )

Material examined. India, Andaman and Nicobar Islands: South Andaman I., 1 female, Bambooflat , tsunami shelter, 11°42.596 ′ N 92°42.573 ′ E, 95 m, 2. VI.2019, Dilmani Kumari leg. (reg. no. ZSI/ ANRC / T/12734 ); Great Nicobar I., 1 female, Great Nicobar Biosphere Reserve , watch tower, 6°59.931 ′ N 93°52.892 ′ E, 123 m, 8.XI.2018, K.C. Gopi et al. leg. (reg. no. ZSI/ ANRC / T/12737 ) .

Redescription. Wing span 45–50 mm. Frons and vertex with yellow scales. Labial palpi light ochreous, upturned. Antennae fuscous. Patagia and tegula yellow with four and two black rounded spots, respectively. Thorax with two fuscous anterior dots.

Forewings narrow, elongate-triangular, with light yellow ground colour. Black wide subbasal stripes lying distal to basal costal spot. Series of black antemedial patches present. Discocellular patch black, roughly rectangular. Medial area light yellow, without patches. Series of slightly oblique black postmedial patches present. Six black rectangular subterminal patches present. Terminal area with yellow scales, broad at apex.

Hind wing yellow, with a series of black postmedial spots forming a broad stripe. Terminal area yellow.

Legs pale ochreous; anterior pair mostly dark fuscous.

Abdomen ochreous-yellow, dorsally with black patches on each segment, whitish near anal angle. Cilia yellowish.

Female genitalia. Papillae anales thick, densely covered with robust hairs. Anterior apophyses nearly as long as posterior apophyses; posterior apophyses with pointed tip. Antrum simple, narrow. Ductus bursae short, straight, without folds. Corpus bursae membranous, oval, without signum.

Distribution. Australia (Queensland), Bhutan ( Irungbam et al., 2016), Laos ( Ko, 2018). First record for India (Andaman and Nicobar Islands).

Remarks. The genus Pachynoa Lederer, 1863 comprises 14 described species, which are mostly distributed from India and Taiwan to the Solomon Islands ( Robinson et al., 1994; Nuss et al., 2013– 2021). Five species of Pachynoa were recorded from India, namely P. fuscilalis Hampson, 1891 , P. grossalis (Guenée, 1854) , P. hypsalis Hampson, 1896 , P. mineusalis (Walker, 1859) , and P. thoosalis (Walker, 1859) ( Ko et al., 2018) .

Figures

Fig. 1. Crambidae. Adults, general view. A, Glyphodes cosmarcha Meyrick, 1887; B, Palpita cirralis (Swinhoe, 1897); C, Pachynoa xanthochyta (Turner, 1933); D, Pagyda arbiter (Butler, 1879).

Fig. 2. Crambidae. Male genitalia (A–C), female genitalia (D–F). A, D, Glyphodes cosmarcha Meyrick, 1887; B, E, Palpita cirralis (Swinhoe, 1897); C, Pagyda arbiter (Butler, 1879); F, Pachynoa xanthochyta (Turner, 1933). Scale bars: 1 mm (A–C), 2 mm (E–F).