Protoplotina Miyatake, 1994

Key to species of Protoplotina Miyatake

1. Body pale yellowish brown, elytra with a black stripe starting a little before inner corners of basal margin and running along suture for nearly three-quarters of its length ( Fig. 20a, b View FIGURE 20 ). Associate line of abdominal postcoxal lines strongly recurved inwards. Distributed in northern India........................................................ P. nigrosuturalis Poorani

- Body dark pitchy brown to black, each elytron with a transverse median yellow or reddish marking. Associate line of abdominal postcoxal lines oblique, enclosing a more or less triangular area with basal line.................................... 2

2. Elytron fully dark brown or dark brown with a barely visible, dark reddish median macula ( Figs. 15c, d View FIGURE 15 ) or paler brown with a yellowish, narrow, transverse band across middle ( Fig. 15b View FIGURE 15 ), occasionally united to form a single transverse band ( Figs 15a View FIGURE 15 , 16b, c View FIGURE 16 ). Abdominal postcoxal lines variable ( Fig. 17d–g View FIGURE 17 ), complete or incomplete with an associate line apically recurved or straight. Male genitalia ( Figs. 17h–j View FIGURE 17 ), female genitalia ( Fig. 17k View FIGURE 17 ), and spermatheca ( Fig. 17l, m View FIGURE 17 ) as illustrated. Distributed in South India ( Tamil Nadu)................................................................ P. ambigua Poorani

- Elytron dark brown with a reddish or yellowish-brown median macula. Abdominal postcoxal lines constant, incomplete with an associate line. Male and female genitalia different from above............................................... 3

3. Elytron with a transverse, ill-defined reddish band at middle, its external borders somewhat paler; a curved row of punctures present on either side of suture. Associate line of abdominal postcoxal lines touching basal line. Female with spermatheca having a well differentiated nodulus and ramus, cornu tubular and apically rounded. Distributed in Vietnam............................................................................................... P. vietnamica Miyatake

- Elytron with a transverse oval, yellowish spot at middle ( Figs 18a View FIGURE 18 , 19a View FIGURE 19 ); lacking a curved row of punctures on either side of suture. Associate line of abdominal postcoxal lines not touching basal line ( Figs 18i, j View FIGURE 18 ; 19b View FIGURE 19 ). Female with spermatheca lacking well-differentiated nodulus and ramus, cornu apically tapering, much narrowed to acute ( Figs 18h View FIGURE 18 , 19c View FIGURE 19 ). Distributed in northeastern India.................................................................... P. sp. near vietnamica