Lateral ocelli separated by 0.4X their widest diameter from each other and about 1.8X their widest diameter from
eye margin. Antennae with 22-23 flagellomeres.
pronotum and mesoscutum (
1,
2) shiny, impunctate. T1 about 1.5X as long as broad.
clypeus light yellowish to white, face (
1,
2,
3) yellow to pale orange, frons (
1,
2) varying from mostly pale orange to entirely brown;
occiput orange.
mesosoma pale orange above, fading to nearly white ventrally (Fig. 2).
metasoma with T1 entirely brown, remaining tergites mostly brown with yellow apical
margin. Fore and mid legs yellow. Most of
hind femur and
tibia yellow, with extreme apices brownish; tarsomeres dark brown to black.
fore wing hyaline, apex dusky.
Physotarsus glabellus is similar to several other smooth-bodied species that have hyaline wings with an infumate apical spot, most notably
P. eliethi Gauld,
P. jamesi Zhaurova,
P. leucohypopygus Zhaurova,
P. niveus Zhaurova, and
P. oculatus Zhaurova. As in
P. jamesi and to some extent
P. eliethi the
hind femur is entirely or almost entirely dark yellow to orange in
P. glabellus. T1 is dark brown in
P. glabellus but orange or mostly orange in
P. jamesi and
P. eliethi has the
first flagellomere about 10X longer than wide.
