The features shown in this image are diagnostic for Bembix palmata males. The bright yellow clypeus is concave apically, has prominent round lobes laterally (curved solid arrow), and has a small median, basal ridge (star). The labrum is depressed near the base (dotted arrow), and also bright yellow. And the shape of the extremely broad front basitarsus (straight arrow) is unique.

Bembix palmata

Image courtesy Reiner Richter
https://inaturalist.ala.org.au/observations/147447501

The best chance to see the sternal process of males is when they are feeding at flowers. This species has a high ridge on S2, right-angled at the apex (straight arrow).

The yellow marks on the sides of the propodeum (curved arrow) are also visible from this angle. Note too the yellow marks on the extreme lateral sides of T1, highlighting the extent to which the dorsal tergites wrap around ventrally.

Bembix palmata

Image courtesy Reiner Richter
https://inaturalist.ala.org.au/observations/147447501