Tribe Crabronini

1  Mandible notched externoventrally, simple apically; if notch is indistinct, then terga I-IV are laterally carinate and folded under

2

1’ Mandible not notched externoventrally, often dentate apically

3

2  Terga I-IV laterally carinate and sharply folded under, sterna flat or concave

Anacrabro

2’ Terga III-IV without lateral carina, rounded laterally, steran convex

Entomognathus

3  Scapal basin with lateral carinae which may be continuous dorsally

Enoplolindenius

3’ Scapal basin ecarinate laterally

4

4  Occipital carina forming a complete circle separated from hypostomal carina, mandible with inner basal spinous tooth; omaulus present

Moniaecera

4’ Occipital carina incomplete or joining hypostomal carina; mandible without inner basal spinous tooth; omaulus present or absent

5

5  Omaulus and postspiracular carina absent; or if omaural area is angulate, recurrent vein ending at middle of submarginal cell

Rhopalum

5’ Omaulus and postspiracular carina present; or if not, recurrent veing ending well beyond middle of submarginal cell

6

6  Ocelli in an equilateral or subequilateral triangle; propodeum smooth or finely sculptured; no verticaulus

Crossocerus

6’ Ocelli in a low triangle except in a few Lestica which have the gena greatly compressed toward the vertex and a few Ectemnius, which have a verticaulus; propodeum various

7

7  Verticaulus absent but sometimes replaced by an angle or sharp tooth; female pygicial plate always flat

8

7’ Verticaulus present (very short in some Ectemnius); female pygidial plate flat or more commonly gutterlike

9

8  Jugal lobe longer than hindwing submedian cell; mandible simple apically; pygidial plate present in male but no tibial shield

Lindenius

8’ Jugal lobe shorter than hindwing submedian cell; mandible usually bidentate apically, pygidial plate usually absent in male but tibial shield often present

Crabro

9  Orbital fovear absent or shallow and evanescent, if limited by a fine inner ridge then upper frons without close moderate to coarse punctuation; male with 12 antennal articles or rarely 13

Ectemnius

9’ Orbital foveae distinct; upper frons with coarse or moderate and close punctuation

Lestica

Key Main