How to key with Gauld:

• Spiracle placed 0.6 of the way along the 1st tergite
• 2m-cu with a single bulla
• Female with non-rigid ovipositor sheath (if long)/subgenital plate not triangular in profile. Male without elongate, spine-like gonosquama
• Gaster with tergites 2-4 depressed, tarsal claws never pectinate

• Hind leg with fifth tarsal segment more than 1.5 times as long as the second, flagellum slightly clavate
  -> To LABENINAE

• Mandible long and slender, labrum exceptionally large. Ovipositor very short (as seen here)
  -> To LABIUM

Labium species keyed with Turner & Waterston:

• Antennae more than 30-jointed
• Face and clypeus not entirely fused or in the same plane, scarcely pilose (hairy)
• Hind empodia elongate, at least two-thirds of the length of the tarsal ungues (claws), mesonotum (mesoscutum) without broad black facia on each side

• Mesonotum (propodeum) shining, smooth or finely punctured.
  Dentiparal area unarmed, or at most with inconspicuous tooth (i.e. around apophyses)

• Flagellum of antenna always with several apical joints ferruginous or ochraceous (orange)
• Dentiparal area more coarsely sculptured than the external or both smooth and shining
• Hind femora ferruginous
• Antenna more than 40-jointed
• Mandibles simple (not bi-dentate)
• Dentiparal area armed, the carinae strongly raised forming small teeth at the outer angles

• Antenna 47-jointed, face yellow, closely and evenly punctured
  -> To L. approximatum

This seems to match with the gbif record here fairly well:
https://www.gbif.org/occurrence/2366166881

@dhobern, @maddigiannotta, thoughts?

I have collected the specimen and can provide higher resolution and further photos.