Tylostega tylostegalis ( Hampson, 1900 )

Du, Xicui & Li, Houhun, 2008, A review of Tylostega Meyrick from Mainland China (Lepidoptera, Crambidae, Spilomelinae), with descriptions of four new species, Zootaxa 1681, pp. 51-61 : 52-53

Tylostega tylostegalis ( Hampson, 1900)

( Figs. 1 , 8 , 13 , 18 )

Entephria tylostegalis Hampson, 1900: 385 ; Leech, 1901: 448.

Pycnarmon tylostegalis: Klima, 1939: 21 ; Inoue, 1980, 106: 91; Inoue, 1982: 331; Wang et al., 2003: 197. Tylostega tylostegalis: Yamanaka & Yoshiyasu, 1992: 83 ; Wang & Speidel, 2000: 199.

Specimens examined. CHINA: 1 Ψ, Neixiang County (33°02' N, 111°50' E), Henan Province, 650 m, 12. VII. 1998, leg. Houhun Li; 1 ɗ, 1 Ψ, Tongbai County (32°21' N, 113°24' E), Henan Province, 300 m, 16–17. VII. 2001, leg. Dandan Zhang; 1 Ψ, Xinyang County (32°06' N, 114°07' E), Henan Province, 700 m, 13. VII. 2001, leg. Dandan Zhang; 2 ɗ, Huixian (35°27' N, 113°47' E), Henan Province, 780 m, 12. VII. 2002, leg. Xinpu Wang; 2 ɗ, 2 Ψ, Shaolinsi (34°30' N, 112°56' E), Henan Province, 700 m, 15–17. VII. 2002, leg. Xinpu Wang; 5 ɗ, 7 Ψ, Shibanyan (36°10' N, 113°42' E), Henan Province, 550 m, 21–23. VII. 2006, leg. Denghui Kuang & Hui Zhen; 4 ɗ, 2 Ψ, Huixian (35°27' N, 113°47' E), Henan Province, 550 m, 25–26. VII. 2006, leg. Denghui Kuang & Hui Zhen; 1 ɗ, Wangwu Shan (35°16' N, 112°10' E), Henan Province, 1100 m, 28. VII. 2006, leg. Denghui Kuang & Hui Zhen; 1 Ψ, Lushi County (34°03' N, 111°02' E), Henan Province, 1100 m, 8. VIII. 2006, leg. Hui Zhen & Denghui Kuang; 1 ɗ, She Xian (36°34' N, 113°40' E), Hebei Province, 700 m, 2. VIII. 2000, leg. Haili Yu; 1 ɗ, Ankang (362°41' N, 109°01' E), Shaanxi Province, 800 m, 2. VII. 2003, leg. Haili Yu; 2 ɗ, Daozhen Autonomous County (28°53' N, 107°36' E), Guizhou Province, 600 m, 29. V. 2004, leg. Shulian Hao; 17 ɗ, 4 Ψ, Yanhe Tujiazu Autonomous County (28°33' N, 108°30' E), Guizhou Province, 430 m, 5–6. VI. 2007, leg. Xicui Du; 1 ɗ, 1 Ψ, Jiulianshan (24°38' N, 114°33' E), Jiangxi Province, 20. VII. 2006, leg. Jiasheng Xu & Weichun Li.

Redescription. Adult ( Fig. 1 ). Wing span 19.0–24.0 mm. Frons yellowish­white or pale yellow except fuscous anteriorly. Antenna with ventral cilia about as long as diameter of flagellomeres in male, minute in female. Labial palpus white or yellowish­white, 2nd segment brown or fuscous dorsally and distally, 3rd segment yellowish­white or pale yellow. Patagium and tegula yellowish­white or pale yellow, with some brown scales. Thorax yellowish­white dorsally, each segment with a fuscous blotch. Forewing pale yellow mottled brown, with fuscous or blackish­fuscous patches at base; discoidal stigma and lines blackish­fuscous; lines broader on costa; postmedial line sinuous to CuA2, acutely retracted to lower cell, then to inner margin; a series of black spots along terminal margin. Hindwing yellowish­white, with fuscous patch at base, two broad brown blotches at distal half, and a short transverse stripe near inner margin; discoidal stigma blackish­brown, discoid; a series of black spots along terminal margin. Cilia of both fore­ and hindwings light brownish­yellow, slightly darker at base. Abdomen with 1st segment white, the remainder pale yellow and suffused with fuscous or blackish­fuscous on 2nd–5th segments dorsally.

Male genitalia ( Figs. 8 , 13 ). Uncus with height greater than basal width. Valva slowly narrowed from base to apex, with small triangular projection medially. Sacculus with dorsal margin strongly arched and bearing dense small teeth, with row of tooth­like processes below dorsal margin. Saccus triangular, bluntly rounded on anterior margin. Juxta with anterior margin rounded, posterior margin deeply concave and protruding posterolaterally. Phallus slightly curved, with two shorter and one longer spine­like cornuti.

Female genitalia ( Fig. 18 ). Apophysis anterioris about 2 times length of apophysis posterioris. Ostium sclerotized and wrinkled peripherally, with two more thickly sclerotized tranverse bands. Ductus bursae twisted, with basal 1/3 more thickly sclerotized, distal 2/3 with broad transverse stripes consisting of small granules. Corpus bursae elliptical or pear­shaped, slightly contracted on one side.

Distribution. China (Hebei, Jiangsu, Zhejiang, Fujian, Jiangxi, Henan, Guangdong, Sichuan, Guizhou, Shaanxi, Taiwan), Korea, Japan and Russia (Far East).

Figures

FIGURES 1 – 5. Adults of Tylostega spp. 1. T. tylostegalis (Hampson), ♂, Tongbai, Henan; 2. T. pectinata sp. nov., ♂, paratype, Daiyun Shan, Fujian; 3. T. luniformis sp. nov., ♂, holotype, Baoxing, Sichuan; 4. T. lata sp. nov., Ψ, paratype, Médog, Xizang (Tibet); 5. T. serrata sp. nov., ♂, paratype, Song County, Henan.

FIGURES 8 – 12. Male genitalia of Tylostega spp. 8. T. tylostegalis (Hampson), slide DXC 05121; 9 a. T. pectinata sp. nov., slide DXC 06352; 9 b. T. pectinata sp. nov., slide DXC 06597; 10. T. luniformis sp. nov., slide DXC 06348; 11. T. lata sp. nov., slide DXC 07043; 12. T. serrata sp. nov., slide DXC 05140.

FIGURES 13 – 17. Cornuti of Tylostega spp. 13. T. tylostegalis (Hampson), slide DXC 05121; 14 a. T. pectinata sp. nov., slide DXC 06352; 14 b. T. pectinata sp. nov., slide DXC 06597; 15. T. luniformis sp. nov., slide DXC 06348; 16. T. lata sp. nov., slide DXC 07043; 17. T. serrata sp. nov., slide DXC 05140.

FIGURES 18 – 21. Female genitalia of Tylostega spp. 18. T. tylostegalis (Hampson), slide DXC 06351; 19. T. pectinata sp. nov., slide DXC 07044; 20. T. luniformis sp. nov., slide DXC 06349; 21. T. lata sp. nov., slide DXC 06404.