Williamsita (Androcrabro)

Williamsita cf. bivittata, copyright David Francis.

Belongs within: Crabronini.

The subgenus Androcrabro of the genus Williamsita is an Australasian group of wasps with a modified antenna in the male (Bohart & Menke 1976).

Characters (from Bohart & Menke 1976): Eyes naked, inner orbits convergent below; scapal basin simple, without median tubercle, ecarinate; ocellar triangle broader than high; gena simple; occipital carina incomplete, curving anteriorly beneath head, not ending in a tubercle; male antenna with 13 articles; flagellum with first article elongate in both sexes, male flagellum with at least one article modified, without ventral hair fringe; palpal formula 6-4; mandible apically bidentate in both sexes, female with preapical tooth on inner margin, externoventral margin entire, inner margin without basal tooth; pronotal collar carinate anteriorly; scutum with strong admedian lines and notauli, scutal flange terminating on lateral margin above tegula, prescutellar sulcus foveate; axillae, scutellum, and metanotum simple; postspiracular carina continuous with omaulus, verticaulus present; sternaulus, hypersternaulus, and mesopleuraulus absent; propodeum weakly to moderately sculptured, dorsal face with enclosure weakly or not defined; lateral propodeal carina absent; recurrent vein joining submarginal cell at its outer third; hindwing normal, jugal lobe a third to a half length of submedian cell; gaster sessile; male with quadrate pygidial plate, that of female very narrow, concave.

<==Williamsita (Androcrabro Leclercq 1950) C85
    |--W. (*A.) neglecta (Smith 1868) [=Crabro neglectus] C85
    |--W. (A.) bivittata (Turner 1908) [=Crabro bivittatus] C85
    |--W. (A.) bushiella Leclercq 1974 C85
    |--W. (A.) manifestata (Turner 1915) [=Crabro (Solenius) manifestatus] C85
    |--W. (A.) ordinaria (Turner 1908) [=Crabro ordinarius] C85
    |--W. (A.) riekiella Leclercq 1974 C85
    |--W. (A.) serena (Turner 1915) [=Crabro serenus] BM76
    |--W. (A.) smithiensis Leclercq 1954 [=Crabro tridentatus Smith 1868 non Fabricius 1775] C85
    |--W. (A.) tasmanica (Smith 1856) [=Crabro tasmanicus] C85
    `--W. (A.) vedetta Leclercq 1974 C85

*Type species of generic name indicated

REFERENCES

[BM76] Bohart, R. M., & A. S. Menke. 1976. Sphecid Wasps of the World. University of California Press: Berkeley.

[C85] Cardale, J. C. 1985. Vespoidea and Sphecoidea. In: Walton, D. W. (ed.) Zoological Catalogue of Australia vol. 2. Hymenoptera: Formicoidea, Vespoidea and Sphecoidea pp. 150–303. Australian Government Publishing Service: Canberra.