Thaia

Key to males of Thaia View in CoL from China

1 Anal tube without apical process Thaia ( Thaia) View in CoL ........................................................................................................... 2

– Anal tube with apical process extending ventrally from 10th segment Thaia ( Nlunga) View in CoL ............................................. 7

2 Aedeagal shaft with one or more basal processes......................................................................................................... 3

– Aedeagal shaft without processes ................................................................................................................................. 5

3 Base of aedeagus with single long, fingerlike process......................................................................... T View in CoL . ( Thaia) nigra

– Base of aedeagus with pair of processes....................................................................................................................... 4

4 Dorsal apodeme of aedeagus expanded, approximately scissorlike............................................... T View in CoL . ( Thaia) oryzivora

– Dorsal apodeme of aedeagus small, approximately trapezoidal....................................................... T View in CoL . ( Thaia) subrufa

5 Dorsal apodeme of aedeagus with pair of small, toothlike processes.......................................... T View in CoL . ( Thaia) formosana

– Dorsal apodeme of aedeagus without toothlike processes............................................................................................ 6

6 Aedeagal shaft long and slim, tubelike, without serrations.......................................................... T View in CoL . ( Thaia) longipenia

– Aedeagal shaft short, lamellate, with ventral serrate comb.............................................................. T View in CoL . ( Thaia) barbata

7 Apical process of anal tube bifurcate at apex................................................................................. T View in CoL . ( Nlunga) sinuata

– Apical process of anal tube not bifurcate at apex ........................................................................................................ 8

8 Ventral appendage of pygofer with few small, serrations both at base and apex ......................... T. ( Nlunga) anchora View in CoL

– Ventral appendage of pygofer without serrations ......................................................................................................... 9

9 Aedeagus with two pairs of processes ( Figs 7, 8 View FIGURES 1 – 9 )....................................................... T. ( Nlunga) View in CoL mengyanga sp. nov.

– Aedeagus without processes.......................................................................................................... T View in CoL . ( Nlunga) maxima