Clitostethus

Yu, Guoyue, Montgomery, Michael E. & Yao, Defu, 2000, Lady Beetles (Coleoptera: Coccinellidae) From Chinese Hemlocks Infested With The Hemlock Woolly Adelgid, Adelges Tsugae Annand (Homoptera: Adelgidae), The Coleopterists Bulletin 54 (2), pp. 154-199 : 158

Key to Species of Clitostethus of China

1 Elytra black with apex lighter --------------------------------------------------------------------------------- 2

1′ Elytra reddish brown without black area; body length 1.7 mm -------------------- ------------------------------------------------------------------------------- C. wenbishanus Yu , new species

2 Head black; body length 1.6 mm -------------------------------------------- C. nigrifrons Yu

2′ Head yellow ------------------------------------------------------------------------------------------------------------------- 3

3 Lateral lobes of tegmen shorter than one­half length of median piece --- 4

3′ Lateral lobes of tegmen longer than one­half length of median piece ---- 5

4 Siphonal capsule with distinct outer process; body length 1.5 mm ------------ ------------------------------------------------------------------------------------------- C. brachylobus Peng et al.

4′ Siphonal capsule with indistinct outer process; body length 2.0 mm --------- ----------------------------------------------------------------------------------- C. bawanglingensis Peng et al.

5 Siphonal capsule with distinct outer process; body length 1.7–2.1 mm ---- ------------------------------------------------------------------------------------- C. acutisiphonicus Peng et al.

5′ Siphonal capsule with indistinct outer process; body length 1.5 mm --------- ---------------------------------------------------------------------------------- C. sternalis (Pang and Gordon)