Aulacophilinus amblygnathus, Menke, 2016

Menke, Arnold S., 2016, A Re-evaluation of the Generic Limits of Pison Jurine, and a New Species of the Genus Aulacophilinus Lomholdt (Hymenoptera: Crabronidae: Trypoxylini), Proceedings of the California Academy of Sciences 63 (11), pp. 333-340 : 337-338

Key to Species of Aulacophilinus la. Forewing with two submarginal cells............................................ 2 1b. Forewing with three submarginal cells........................................... 4

2a. Gastral segment I in the form of a slender petiole with tergum swollen only at apex (Fig. 1); propodeal side not delimited above by carina; Solomon Islands (Rennell I.)...................................................................... rennellensis Lomholdt

2b. Gaster sessile, segment I not forming a petiole; propodeal side sometimes delimited above by carina; Australia, Norfolk I................................................... 3

3a. Mesopleuron with omaulus; face, scutum and mesopleuron areolate rugulose; pronotum with transverse crenulate carina; northern Australia....................... weiri (Naumann)

3b. Mesopleuron without omaulus; face, scutum and mesopleuron punctate; pronotum without transverse carina; widespread in Australia, Norfolk I................ caliginosus (Turner)

4a. Body entirely black; New Guinea............................. amblygnathus sp. nov. 4b. Body not entirely black, either mandibles or legs and abdomen extensively amber colored; Australia..................................................................... 5

5a. Mandible amber colored, abdomen and legs black; ocellocular distance 0.75 or more times hindocellus diameter; frons densely punctate, interspaces dull; propodeal side delimited dorsad by carina that may be irregular and crenulate; anterior veinlet of third submarginal cell about one third length of posterior veinlet; southwestern Australia........... mandibulatus (Turner)

5b. Mandible black, abdomen and legs largely amber colored; ocellocular distance less than half diameter of hindocellus; frons coarsely punctate-areolate, interspaces shiny; propodeal side without carina dorsad; anterior veinlet of third submarginal cell half length of posterior veinlet; northern and eastern Australia.............................. pyrrhicus (Naumann)