Couplet 23.

History

[1] Fourth antennal segment never modified; a sexual mod...

[2] Mandibles of ordinary form, short and only slightly ...

[6] Scutellum posteriorly with at most a single, short, ...

[10] Mandibles not forming a beak

[13] Marginalis rarely as long as this and then the radia...

[15] Propodeal keel simple

[17] Radial cell more or less open at apex eith...

[1] Fourth antennal segment never modified; a sexual mod...

[2] Mandibles of ordinary form, short and only slightly ...

[6] Scutellum posteriorly with at most a single, short, ...

[10] Mandibles not forming a beak

[13] Marginalis rarely as long as this and then the radia...

[15] Propodeal keel simple

[17] Radial cell more or less open at apex eith...

Half the apical circumference of the scape raised to form a rim or flange, each extremity of which forms an angular projection; pronotum with a deep pit on each side, separated by a flat, shining bridge and each filled below with a tuft of pubescence. (A spurious radialis encloses a long, very narrow, radial cell, (fig. 102); scape about one and a half times longer than flagellum 1)

apical circumference of the scape simple; pronotum without a deep, pubescence-filled pit on each side

future couplets

Radialis virtually absent or showin... ...
Psilomma Foerster

Radialis better developed, either s... ...
Zygota Foerster