Liris laboriosus, (F. Smith)

Pham, Phong Huy & Antropov, A. V., 2021, Contributions to the knowledge of the spheciformes fauna (Hymenoptera: Ampulicidae, Crabronidae, Sphecidae) from Vietnam, Russian Entomological Journal 30 (3), pp. 314-322 : 317

KEY TO FEMALES (Females of L. laboriosus (F. Smith) are unknown)

1. Outer margin of mandible rather shallowly notched; head and thorax with golden pubescence; scape, pedicel, and legs except basal portions ferruginous; wings purplish dark brown; body length 14–20 mm .............................. ............................................ Liris aurulentus (Fabricius)

— Outer margin of mandible markedly deeply notched .... 2

2. Disc of pygidium with a bare and polished wedge-shaped area enlarging from base to middle; pygidial setae black; body length 10 mm ............ Liris robustoides (William)

— Disc of pygidium without bare and polished wedge-shaped area ................................................................................ 3

3. Mesopleuron shining and punctuate; pronotum in middle highly raised only nearly mesoscutum; body length 6–9 mm .......................................... Liris festinans (F. Smith)

— Mesopleuron coriaceous or dull; pronotum in middle markedly depressed only below mesoscutum .............. 4

4. Hind femora and all tibiae reddish; propodeum without lateral carinae; body length 11 mm ................................ ............................................ Liris larriformis (William)

— All tibiae black ............................................................... 5

5. Setae on head, thorax and pile bands on metasomal ternum golden; metasomal sternum with carina extending from near base to middle; body length 15 mm ....................... .................................................. Liris deplanatus (Kohl)

— Setae on head, thorax and metasomal bans of pile silvery ....................................................................................... 6

6. Anterior bevel of clypeus lobe impunctate and polished; body light; body length 10–13 mm ................................ ..................................................... Liris difficilis Tsuneki

— Anterior bevel of clypeus lobe punctate and dull; body dull; body length 10–13 mm .. Liris subtessellatus (F. Smith)