Procystiphora

Jiao, Kelong & Bu, Wenjun, 2010, Notes on the genus Procystiphora Felt, 1915 (Diptera: Cecidomyiidae) with description of one new species inducing galls in branchlets of a bamboo in China, Zootaxa 2717, pp. 53-61 : 54

Key to males of all known Procystiphora species

1. Third flagellomere with neck distinctly longer than node .............................................................. P. coloradensis Felt

- Third flagellomere with neck as long as or shorter than node...................................................................................... 2

2. Hypoproct with lobes pointed apically ........................................................................................................ P. junci Felt

- Hypoproct with lobes rounded apically ....................................................................................................................... 3

3. Gonocoxite with two triangular mediobasal lobes, including shorter dorsal one and longer one clasping aedeagus; hypoproct not deeply emarginate, with stout lobes 1.4–1.5 times as long as wide; antenna with 20–21 flagellomeres; wing length 3.7–3.8 mm .......................................................................................................... P. uedai Sato & Yukawa

- Gonocoxite with long mediobasal lobe(s) clasping aedeagus; hypoproct emarginate deeply with slender lobes 2.4– 3.0 times as long as wide; antenna with 15–18 flagellomeres; wing length 2.3–2.4 or about 2.8 mm ....................... 4

4. Gonocoxite with mediobasal lobes apically blunt and concave at outer margin; aedeagus a little longer than gono- coxite; empodium longer than the tarsal claw ..................................................................................... P. gerardi Meyer

- Gonocoxite with stout and apically rounded mediobasal lobe; aedeagus distinctly shorter than gonocoxite; empo- dium as long as the tarsal claw ................................................................................................. P. phyllostachys sp. nov.