Orvasca subnotata Walker, 1865

Wang, Houshuai, Wang, Min & Fan, Xiaoling, 2011, Notes on the tribe Nygmiini (Lepidoptera: Erebidae: Lymantriinae) from Nanling National Nature Reserve, with description of a new species, Zootaxa 2887, pp. 57-68 : 59

Orvasca subnotata Walker, 1865

( Figs. 7–8 , 30 , 44 )

Orvasca subnotata Walker, 1865: 502 ; Holloway, 1999: 54. Porthesia subnotata: Collenette 1932: 57 .

Euproctis polydorus Schintlmeister, 1994: 133 .

[ Porthesia scintillans: Chao 2003: 320 .] Misidentification

Diagnosis. Forewing length 11–16 mm. Both sexes are somewhat similar to the female of Somena scintillans , but the forewing is paler, crossed by two distinct, whitish median lines. Male genitalia ( Fig. 30 ): Tegumen broad; uncus short, acute, with a rugose protrusion at ventral part; valva bifid, the dorsal arm short, the ventral arm long. Female genitalia ( Fig. 44 ): Papilla analis small; ostium V-shaped; sterigma bilobed, M-like; ductus cylindrical, sclerotized at base; signum with a bicornute process.

Material examined. 13, Nanling National Nature Reserve, Guangdong, 2.V.2006; 23, 1Ƥ, same locality, 18.XI.2008.

Distribution. China (Zhejiang, Fujian, Hunan, Guangdong, Guangxi, Sichuan, Yunnan, Shanxi, Taiwan), Burma, India, Pakistan, Sri Lanka, Malaysia, Singapore, Indonesia.

Remarks. The species is often confused with Somena scintillans due to the similarity of superficial characters, but the male genitalia of both species are different; the latter can be easily distinguished by a broad and weakly bifid uncus.

Figures

FIGURES 1 – 26. Adults of Nygmiini species. 1 – 2. Arna bipunctapex, 1. male, 2. female; 3 – 4. A. bicostata sp. nov., 3. male holotype, 4. female paratype; 5 – 6. Somena scintillans, 5. male, 6, female; 7 – 8. Orvasca subnotata, 7. male, 8. female; 9 – 10. Artaxa angulata comb. nov., 9. male, 10. female; 11. Euproctis sakaguchii, male; 12. A. digramma, male; 13 – 14. Toxoproctis croceola comb. nov., 13. male, 14. female; 15 – 16. Nygmia uniformis, 15. male, 16. female; 17 – 18. Euproctis montis, 17. male, 18. female; 19 – 20. E. telephanes, 19. male, 20, female; 21 – 22. E. yunnanpina, 21. male, 22, female; 23 – 24. E. piperita, 23. male, 24. female; 25 – 26. E. flavotriangulata, 25. male, 26. female. Scale bar = 2 cm.

FIGURES 27 – 34. Male genitalia of Nygmiini species. 27. Arna bipunctapex; 28. A. bicostata sp. nov.; 29. Somena scintillans; 30. Orvasca subnotata; 31. Artaxa angulata comb. nov.; 32. Euproctis sakaguchii; 33. A. digramma; 34. Toxoproctis croceola comb. nov..

FIGURES 41 – 49. Female genitalia of Nygmiini species. 41. Arna bipunctapex; 42. A. bicostata sp. nov.; 43. Somena scintillans; 44. Orvasca subnotata; 45. Artaxa angulata comb. nov.; 46. Toxoproctis croceola comb. nov.; 47. Nygmia uniformis; 48. Euproctis montis; 49. E. telephanes.