Lateral ocelli separated by about 0.6X their widest diameter from each other and about 2.0X their widest diameter from
eye margin.
antenna with 24-27 flagellomeres.
pronotum and mesoscutum (
1,
2) shiny, impunctate. T1 about 2.2X as long as broad. Anterior
margin of
clypeus white, rest of
clypeus,
head and
mesosoma orange except anteromedian 0.6 of propodeum (
1,
2,
3) brown, rest white.
metasoma with T1 white anteriorly, brown posteriorly; rest of tergites brown with narrow, white apical margins.
hind leg dark brown to black except coa posteriorly and ventrally, most of
femur, and part of
tibia white.
fore wing hyaline, apex weakly infumate.
Physotarsus niveus is similar to several other smooth-bodied species that have hyaline wings with an infumate apical spot, most notably
P. eliethi Gauld,
P. glabellus Zhaurova,
P. jamesi Zhaurova,
P. leucohypopygus Zhaurova, and
P. oculatus Zhaurova. As in
P. leucohypopygus and
P. oculatus the
hind femur on the outer or anterior face (
1,
2,
3) is entirely or almost entirely dark brown to black in
P. niveus but unlike the other two species, the
hind femur is extensively white on the posterior face (
1,
2,
3). The ocellar field is dark brown in
P. oculatus but the
head above is completely orange in
P. leucohypopygus and
P. niveus_. The propodeum (1, 2, 0001248">3) is entirely orange in
P. leucohypopygus but dark brown anteriorly and white posteriorly in
P. niveus.
