Dolichocephala

Liu, Xiaoyan, Wang, Mengqing & Yang, Ding, 2014, The genus Dolichocephala newly found in Shaanxi Province (China), with descriptions of three new species (Diptera: Empididae), Zootaxa 3841 (3), pp. 439-445 : 440

Key to species of Dolichocephala from China

(modified from Yang 2008)

1 Wing with many small white spots ( Fig. 5 ); clasping cercus rather wide, not finger-like or spine-like ( Fig. 6 )............. 2

– Wing with 6–8 large, distinct white spots ( Figs 1 , 3 ); clasping cercus rather narrow, finger-like or spine-like ( Figs 2 , 4 )..... 4

2 Hypandrium with a wide tuft of loose bristles at apex; dorso-apical corner of clasping cercus obtuse.................... 3

– Hypandirum with a narrow bundle of tight bristles at apex; dorso-apical corner of clasping cercus somewhat acute ( Fig. 6 ).................................................................................... D. qinlingensis sp. nov.

3 Male cercus nearly quadrate, with a small inner process basally; epandrial lamella without antero-dorsal process................................................................................................... D. sinica Horvat

– Male cercus somewhat triangular without inner process basally, but with nearly acute posterior corner; epandrial lamella with short antero-dorsal process................................................................. D. irrorata Fallén

4 Wing with only six large white spots; clasping cercus relatively thick, finger-like................................... 5

– Wing with 7–8 large white spots ( Figs 1 , 3 ); clasping cercus thin, spine-like ( Figs 2 , 4 ).............................. 7

5 Thoracic pleuron with a blackish dorsal stripe; clasping cercus strongly curved inward and nearly geniculate; distiphallus nar- row in dorsal view..................................................................................... 6

– Thoracic pleuron without dorsal stripe; clasping cercus weakly curved inward apically and not geniculate; distiphallus very wide or broad in dorsal view...................................................... D. orientalis Yang, Zhu & An

6 Mesonotum blackish; clasping cercus with a separate tubercle at base; basiphallus rather wide with angulate posterior process in lateral view.................................................... D. guangdongensis Yang, Grootaert & Horvat

– Mesonotum dark yellow with anterior and lateral portions blackish; clasping cercus without separate tubercle at base; basiphal- lus rather narrow without angulate posterior process in lateral view.............................. D. hainanensis Yang

7 Wing with 7–8 large white spots all rounded ( Figs 1 , 3 ); tarsi apically dark brown.................................. 8

– Wing with eight white spots (middle spot in anterior row and outer two spots in posterior row not rounded); tarsi entirely dark brown......................................................................... D. cuiae Yang, Zhang & Yao

8 Wing with eight hyaline spots, apical spot (in cell r5) large and distinct ( Fig. 3 ); clasping cercus long spine-like, distinctly lon- ger than width of epandrial lamella ( Fig. 4 ).................................................... D. longa sp. nov.

– Wing with seven hyaline spots, apical spot (in cell r5) very small and indistinct ( Fig. 1 ); clasping cercus short spine-like, shorter than width of epandrial lamella ( Fig. 2 )................................................. D. brevis sp. nov.

Figures

FIGURES 5 – 6. Dolichocephala qinlingensis sp. nov. (male). 5. Wing; 6. genitalia, lateral view.

FIGURES 1 – 2. Dolichocephala brevis sp. nov. (male). 1. Wing; 2. genitalia, lateral view.

FIGURES 3 – 4. Dolichocephala longa sp. nov. (male). 3. Wing; 4. genitalia, lateral view.