Bittacidae, Handlirsch, 1906

Zhang, Yan-Na, Du, Wei & Hua, Bao-Zhen, 2020, Three new species of the genus Bittacus Latreille, 1805 (Mecoptera: Bittacidae), with a key to the species of Bittacidae in South China, Zootaxa 4718 (3), pp. 381-390 : 382

Key to the species of Bittacidae in South China

1 Epandrial lobe prolongated apically, with complicated processes at inner, ventral and dorsal sides; gonocoxites with two long distal prolongations; Oriental Region...................................................................... 2

- Epandrial lobe simple and varying; gonocoxites without long prolongations; cosmopolitan........................... 3

2 Gonocoxite prolongated caudally; apex of proctiger approximately L-shaped; dorsal margin of epandrial lobe extending ventromesad into a long sabre-shape; gonostylus slender; Guangxi (Tianlin)............... Bicaubittacus yangi Tan & Hua, 2009

- Gonocoxite not prolongated caudally; apex of proctiger rounded, without processes; middle part of epandrial lobe with two processes on ventral margin; gonostylus short, broad basally; Guangdong (Mt. Yim Na)......................................................................................... Bicaubittacus longiprocessus (Huang & Hua, 2005)

3 A transverse band across ocellar triangle extending to compound eyes............................................4

- A transverse band across ocellar triangle not extending to compound eyes........................................ 5

4 Epandrial lobe approximately rectangular, rounded distally in lateral view, with a digital process on inner side; Guangxi (Mao’ershan)....................................................................... Bittacus lii Zhou, 2003

- Epandrial lobe trapezoid for the main body in lateral view, with a slender elongate lobe at ventro-distal apex; Guangxi (Napo)....................................................................... Bittacus monastryrskiyi Bicha, 2007

5 Epandrial lobe with a process at ventro-distal apex........................................................... 6

- Epandrial lobe without process at ventro-distal apex.......................................................... 8

6 Upper branch of proctiger truncated distally, with a pair of lateral processes; Guangdong (Mt. Yim Na)......................................................................................... Bittacus gressitti Chen & Hua, 2011

- Upper branch of proctiger digitate, without process.......................................................... 7

7 Epandrial lobe trapezoid for the main body in lateral view, with a slender elongate lobe at ventro-distal apex and a blunt process at dorso-distal apex; cerci elongate, slightly shorter than gonocoxites; Guangdong (Mt. Yim Na).... Bittacus longilobus sp. n.

- Epandrial lobe hat-shaped in lateral view, with a sharp process at ventro-distal apex; cerci as long as half length of gonocoxites; Guangxi (Mao’ershan)................................................................. Bittacus acutus sp. n.

8 One Pcv; wings with a cuneiform marking along R 5; Hainan (Bawangling)........... Bittacus hainanicus Tan & Hua, 2008

- Two Pcv; wings without marking along R 5 ................................................................. 9

9 Wings with two middle streaks in a V-shape; epandrial lobe sub-triangular in lateral view; upper branch of proctiger bootshaped; Guangdong (Tsao Kok Wan)............................................... Bittacus shaoguanensis sp. n.

- Wings only with four markings, each at ORs, FRs, OM and the distal end of CuP; epandrial lobe rectangular in lateral view; upper branch of proctiger digitate; Hainan (Diaoluoshan)..................... Bittacus diaoluoshanus Chen & Hua, 2011