1986] 
Rasnitsyn — Fossil Tiphiidae 
99 
Figure 7. Geotiphia orientalis, holotype, no. 3429/100. Paleontol. Inst. Acad. 
Sciences, USSR, Moscow. 
Comparison. As preserved this species is very similar to foxi- 
ana, differing in having a longer pterostigma, the posterior side of 
cell 3rm shorter, and the metasomal segments without light spots 
[The latter difference may be meaningless because the color pattern 
is known only for the metasonal sterna in foxiana and possibly only 
for terga in orientalis]. 
The above data show considerable taxonomic and anagenetic 
evolution of the subfamily Myzininae since the early Oligocene, an 
interval of about 35 million years. Both fossil genera have been 
replaced with a wide array of living genera, and even the most 
primitive modern genus, Myzinum Latreille, is probably further 
away from its Oligocene predecessors than these predecessors are 
from their anthoboscine ancestor. A paleontological history is not 
