Eugauria albidentata ( Hampson, 1897 )

Wu, Zhi-Gang, Chen, Fu-Qiang & Wu, Chun-Sheng, 2015, Review of the genus Eugauria Snellen (Lepidoptera: Crambidae: Musotiminae) in China, with descriptions of two new species, Zoological Systematics 40 (4), pp. 470-475 : 472

Eugauria albidentata ( Hampson, 1897) ( Figs 2 , 5 )

Cataclysta albidentata Hampson, 1897 . Trans. Ent. Soc. Lond., 1897: 153. Type-locality: Java.

Eugauria compactalis Snellen, 1901 . Tijdschr. Ent., 43: 291, pl. 181, fig.12. Type-locality: Java.

Eugauria albidentata: Speidel & Mey, 1999 . Tijdschr. Ent., 142: 138.

Diagnosis. The species is different from others by the inner edge of the inner and larger white patch on the forewing slightly incurved. In male genitalia, the basal half of the valval costa is strongly scleorized, the broad sacculus bears an apical harpe, and the transtilla is small and papilla-like.

Descriptions. Adults. Wing span of male 12 mm. Head, thorax and abdomen dark fuscous; labial palpi upturned, dark fuscous on sides, length about 2 times of diameter of compound eyes, 2nd slender and 3rd segment pointed; maxillary palpi upturned; proboscis relatively short. Forewing dark fuscous; a dark spot at upper angle of cell; a larger white patch at postmedial area, extending from costa to Cu 1, its inner edge slightly incurved; a smaller crescent white patch at outside of the apical yellow band; a yellow band between the white patches; cilia dark fuscous. Hindwing dark fuscous; a black spot at middle of cell; anal angle with an incision; submarginal band with 5 connected black eye spots, eye spots with a silvery spot centrally; cilia dark fuscous.

Male genitalia. Uncus slender, pointed at apex; gnathos slender, as long as uncus, apex pointed, with dorsal teeth; tegumen with inverted V-shaped ridge dorsally; valva broadened form base to distal; costa with basal half strongly sclerotized, middle portion projected upwards; transtilla small papilla-like; sacculus broad and sclerotized, with a spine-like apical harpe; vinculum long; saccus large, rounded; juxta plate-like; aedeagus slender and sclerotized.

Female genitalia. Unknown.

Biology. This species feeds on the ferns of Nephrolepis Schott (Yen, Solis & Goolsby, 2004) . A life cycle lasts no more than 20 days (Yen, per. comm.).

Host plants. Nephrolepis sp.

Material examined. 1♂, Taiwan, Kuei-shan Is. (24.8ºN, 121.9ºE), 27 May 1999, Hsiau-Yue Wang (Ny1016) ; 1♂, Taiwan, Yilan, Fushan (24.7ºN, 121.7ºE), 620 m, 12 April 2008, Fu-Qiang Chen, deposited in IZCAS .

Distribution. China (Taiwan); Java.

Figures

Figs 2–4. Adults of Eugauria spp. (a. enlargement of forewing). 2. E. albidentata. 3. E. arcuosa Chen & Wu, sp. nov., holotype, ♂. 4. E. crenata Chen & Wu, sp. nov., holotype, ♂.

Figs 5–9. Genetalia of Eugauria spp. (a. aedeagus; b. dorsal view of apical gnathos). 5. E. albidentata, male. 6–7. E. arcuosa Chen & Wu, sp. nov., male and female. 8–9. E. crenata Chen & Wu, sp. nov., male and female. Scales bars=1mm.