Terthrothrips Karny 1925

Key to Terthrothrips species from China (females)

1. Pronotal am stout and well developed, much longer and stouter than ocellar setae, expanded at apex; aa absent... T. palmatus

-. Pronotal am reduced to minute and fine setae, shorter or as long as ocellar setae, pointed at apex; aa absent or present...... 2

2. Pronotum with 4 pairs of well developed capitate setae (aa, ml, epim and pa) (Fig. 2)................................ 3

-. Pronotum with 3 pairs of well developed capitate setae (ml, epim and pa)......................................... 4

3. Pronotal am as long as ocellar setae, fine and acute; metanotum smooth medially with polygonal reticulation laterally; pelta long hat-shaped (Fig. 7) with slender lateral lobes and distinctly sculptured........................... T. levigatus sp. n.

-. Pronotal am variable in length, but not longer than ocellar setae; metanotum sculptured with polygonal reticulation medially; pelta irregularly hat-shaped and weakly sculptured.................................................... T. parvus

4. Fore tibiae with apparent tubercles on inner margin........................................................... 5

-. Fore tibiae without tubercles on inner margin................................................................ 6

5. Antennal segment VIII longer than segment VI; pelta bell-shaped with short lobes laterally............ T.ananthakrishnani

-. Antennal segment VIII much shorter than segment VI; pelta broadly trapezoidal, with indistinct lateral lobes...... T.apterus

6. Eyes approximately 1/3 of head length, equally developed ventrally and dorsally; antenna brown with median segments slightly pale; metanotum smooth medially with polygonal reticulation laterally; pelta irregularly hat-shaped and weakly sculp- tured........................................................................................ T. strasseni

-. Eyes slightly shorter than 1/4 of head length, smaller ventrally than dorsally; antenna uniformly brown; metanotum entirely smooth; pelta triangular and smooth without any sculpture........................................ T. trigonius sp. n.