Caissa longisaccula, Wu, Chunsheng & Fang, Chenglai, 2008

Wu, Chunsheng & Fang, Chenglai, 2008, A review of the genus Caissa Hering in China (Lepidoptera: Limacodidae), Zootaxa 1830, pp. 63-68 : 65-68

Caissa longisaccula sp. nov. (Figs. 3, 7)

Diagnosis: This new species is related to Caissa gambita Hering , but differs from the latter by the forewing with the medial fascia wider at costal margin than at inner margin. The new species is easily distinguished from the other species of this genus by the longer process of sacculus in the male genitalia.

Forewing length 9–12mm. Body light yellowish white; inner margin of tegula, hair-tuft of thorax and dorsum of abdomen brown. Forewing light yellowish white, medial fascia blackish brown, divided by a gray band, wider at costal margin; a indistinct waved blackish brown line from M3 to inner margin at outside of medial fascia; subterminal fascia from costal margin obliquely to tornus. Hindwing yellowish white to gray, apex and tornus respectively with a black dot.

Male genitalia: Tegumen laterally with thin hair; uncus with a short subapical process; gnathos long, apex pointed; valva wide, sacculus narrow and long, ending in a long process; juxta apically forked, which densely with small spines; aedeagus narrow and long, curved slightly, shorter than valva- length, with a lot of minute spines.

Female genitalia: Ductus bursae wider at base, the other portion narrow and long, spiral, densely with minute spines; corpus bursae large, ovate; signum composed of more than 10 star-like spines.

Food plants: Camellia, Corylus, Xylosma.

Holotype ɗ, Fujian, Mt. Longqi (600m), 1991. VIII.13, Song Shimei, gen. slide no. L06075.

Paratypes 1ɗ, same data as holotype; 2ɗɗ, Guangxi, Longsheng County (300m), 1963. V.26, Wang Chunguang, gen. slide no. L06074 ; 1ɗ, Hunan, Changsha, 1974. V.23 Zhang Baolin; 2ɗɗ, Chongqing, Fengdu County: Siping (610m), 1994. VI.2–3, Li Wenzhu; 3ɗɗ, Guizhou, Meitan, 1980. VI.30 Xia Huai’en; 1ɗ, 1975.VIII; 2ɗɗ, Shangdong, Yiyuan, 1981.VII.121ɗ, Beida forestry farm, 1981. VII.14; 2&&, 1ɗ, Liaoning, Fengcheng, 1964.VII., Wei Chenggui, gen. slide no. L06076ɗ, L06077&; 4&&, 7ɗɗ, Beijing, Shanbao, 1972. VII.23–25 Zhang Baolin, Zhao Jianming; 1ɗ, Beijing, 1974. III.18; 2ɗɗ, Anhui, xuancheng, 1979. VIII.23 Wang Sizheng, gen. slide no. L06081, L06082; 2ɗɗ, Zhejiang, Hangzhou, 1975. VIII.26 Yan Hengyuan; 1ɗ, Hangzhou plant garden, 1976. VI.12 Chen Ruijing, gen. slide no. L06078; 1ɗ, 1980. VIII.13; 1ɗ, Hubei, Shengnongjia: Songbai, 1984. VI.24.

FIGURES 5–8. Genitalia of Caissa spp. (a. male, b. aedeagus, c. female). 5. C. gambita Hering , Yunnan, Xishuangbanna, gen. slide no. L06080; 6. C. parenti Orhant , Yunnan, Menghai Co., gen. slide no. L06073 ; 7. C. longisaccula , sp. nov., ɗ, paratype, Anhui, Xuancheng Co., gen. slide no. L06081, &, paratype, Liaoning, Fengcheng Co., gen. slide no. L06077; 8. C. caii , sp. nov., paratype, Shaanxi, Ningshan Co., gen. slide no. L06079.

Other specimens examined: 3ɗɗ, Hubei, Junxian County; 1ɗ, Henan, Tongbai: Shuiliandong (300m), 2000. V.24, Sheng Xiaocheng; 1ɗ, Songxian, Mt. Songshan (1000m), 2002. VII.16–18, Sheng Xiaocheng. Distribution: Beijing, Liaoning, Shandong, Zhejiang, Anhui, Fujian, Henan, Hubei, Hunan, Guangxi, Sichuan, Guizhou.

Etymology: The specific name is derived from Latin longus (= long) and sacculus, corresponding to the long sacculus of the valva in the male genitalia.

Caissa caii sp. nov. (Figs.4, 8)

Diagnosis: It is easy to distinguish this new species from the other species of the genus by the forked apex of the gnathos in the male genitalia.

Forewing length 10–12mm. Head pale white. Body light yellowish white; inner margin of tegula, hair-tuft of thorax and dorsum of abdomen brown. Forewing light yellowish white, medial band blackish brown, quite wide, a arched white streak embedded in it near inner margin of wing; discal spot small, white; subterminal fascia waved, from costal margin obliquely to tornus; a black trigonal spot at costal margin before apex. Hindwing gray, apex and tornus respectively with a black dot.

Male genitalia: Tegumen laterally with thin hair; uncus with a short subapical process; apical portion of gnathos relatively short and wide, apex forked slightly; valva narrow and long, widening from base to apex, sacculus ending in a spine; juxta long, apical portion densely with small spines; aedeagus narrow and long, curved slightly, with a bar at apex and a lot of minute spines at base.

Holotype ɗ, Shaanxi, Ningshan County: Huoditang (1620m), 1979. VII.29, Han Yinheng. Paratype 1ɗ, same data as holotype, gen. slide no. L06079; 1ɗ, Hubei, Shengnongjia County: Jiuhu (1640m), 1980. VII.24.

Distribution: Hubei, Shaanxi.

Etymology: The specific name is named in honour of Mr. Rongquan Cai for his contribution to the classification of Chinese Limacodidae .