1979] 
Carpenter — Permian Insects from Oklahoma 
281 
CUP CUA | MP | 
Figure 14 (above). Misthodotes edmundsi, n.sp. Photograph of holotype, MCZ 
5184 (hind wing). Length of wing, 10 mm. Permian of Oklahoma. 
Figure 15 (below). Misthodotes edmundsi, n.sp. Drawing of holotype. Lettering 
as in figure 12. Permian of Oklahoma. 
This species is named for Dr. George F. Edmunds, Jr., University 
of Utah, in recognition of his outstanding contributions to the study 
of mayflies. The species is close to obtusus but differs in the wing 
shape; in obtusus the costal margin is consistently slightly concave, 
and the costal area remains wide until the very base of the wing; the 
maximum width of the wing of obtusus is nearer the base. Also, the 
wing of obtusus lacks maculations. In addition to wing shape, 
edmundsi differs from biguttatus (from Elmo) in having the center 
maculation much larger and irregular. 
Two other specimens from the Midco beds are apparently Mis¬ 
thodotes ovalis Tillyard, a species described from Elmo on the basis 
of a single wing. This is the largest species of Misthodotes known; 
