Merogomphus spp., 1904

Key to the males of Merogomphus spp. View in CoL of the Western Ghats

1 Mid-dorsum of abdomen without extensive yellow markings.................................................. 2

Mid-dorsum of abdomen with extensive yellow markings ( Fig. 15g –h View FIGURE 15 ).............................. M. longistigma

2 Cerci tips approaching each other ( Fig. 15f, i, l View FIGURE 15 ); genital ligula has short flagella................................... 3

Cerci tips parallel to each other ( Fig. 15c View FIGURE 15 ), genital ligula has long flagella........................... M. aryanadensis

3 Middle yellow stripe on lateral pterothorax is inconspicuous, yellow mark on mid-dorsum of S3 is absent ( Fig.15d–e View FIGURE 15 )............................................................................................ M. flavoreductus

Middle yellow stripe on lateral pterothorax is prominent, yellow mark on mid-dorsum of S3 is present ( Fig. 15j–k View FIGURE 15 ).......................................................................................... M. tamaracherriensis

Key to the females of Merogomphus spp. of the Western Ghats

1 Mid-dorsum of abdomen without extensive yellow markings.................................................. 2

Mid-dorsum of abdomen with extensive yellow markings......................................... M. longistigma

2 Yellow mark on mid-dorsum of S3 is absent................................................................ 3

Yellow mark on mid-dorsum of S3 is present.............................................. M. tamaracherriensis

3 Middle yellow stripe on lateral pterothorax is prominent......................................... M. aryanadensis

Middle yellow stripe on lateral pterothorax is inconspicuous...................................... M. flavoreductus