Apanteles metacarpalis

Liu, Zhen, He, Jun-Hua & Chen, Xue-Xin, 2014, The grandiculus- and metacarpalis - group of the genus Apanteles Foerster, 1862 (Hymenoptera, Braconidae, Microgastrinae) from China, with descriptions of eight new species, Zootaxa 3765 (5), pp. 435-457 : 443

Key to species of metacarpalis -group of Apanteles from China

1. Metacarp at most twice as long as its distance from apex of the marginal cell...................................... 2

- Metacarp at least three times as long as its distance from apex of the marginal cell.................................. 6

2. Basal field of T2+3 very small; ovipositor sheath truncate apically. China (Neimenggu); Italy, Mongolia................................................................................................... A. pelopea Nixon, 1973

- Basal field of T2+3 larger; ovipositor sheath not truncate apically............................................... 3

3. T1 not strongly narrowed posteriorly; T2 slightly transverse; vein cu-a straight and perpendicular to vein 1-1A. China (Hebei)......................................................................... A. transtergum Liu & Chen , sp. n.

- T1 strongly narrowed posteriorly; T2 triangular to subtriangular; vein cu-a more or less curved and oblique inwardly...... 4

4. Vein 1-1A short, only 1/5 of fold of vannal lobe; antenna distinctly shorter than body; ovipositor sheath hammer-like.................................................................................... A. malleus Liu & Chen , sp. n.

- Vein 1-1A relatively long, about 1/3 of fold of vannal lobe; antenna almost as long as body length; ovipositor sheath not ham- mer-like............................................................................................. 5

5. Wings milky-white; penultimate antennomere only slightly longer than wide; apical margin of clypeus weakly elliptic; very black. China (Shanxi); Palaearctic Region........................................ A. metacarpalis (Thomson 1895)

- Wing membrane hyaline; penultimate antennomere 1.5× as long as wide; apical margin of clypeus strongly elliptic; not that black, pruinose. China (Jilin, Liaoning)............................................ A. dumosus Liu & Chen , sp. n.

6. T1 parallel-sided at anterior half, but abruptly strongly narrowed to apex at posterior half; antenna distinctly longer than body; apical margin of clypeus emarginated. China (Zhejiang)....................... A. cosmopterygivorus Liu & Chen , sp. n.

- T1 subparallel and gradually constrict posteriorly; antenna at most as long as body; apical margin of clypeus straight...... 7

7. Basal field of T2+3 very small; penultimate antennomere only slight longer than wide; spurs of hind tibia of equal size.................................................................................. A. incurvus Liu & Chen , sp. n.

- Basal field of T2+3 larger; penultimate antennomere at least 1.5× as long as wide; inner spur of hind tibia very distinctly longer than outer one. China (Ningxia); Palearctic region...................................... A. corvinus Reinhard, 1880