278 
Psyche 
[June-September 
Figure 11 (above). Misthodotes obtusus. Sellards. Photograph of hind wing 
(neotype): YPM 5470, from Permian of Kansas. Length of wing, 10 mm. 
Figure 12 (below). Misthodotes obtusus Sellards. Drawing of fore wing, based 
on MCZ 4386ab, from Permian of Kansas. Length of wing, 10 mm. Lettering 
as in figure 2. 
Since the type of obtusus was accidentally destroyed in 1927, I 
subsequently designated (1933) specimen numbered YPM 5470 in 
the Peabody Museum at Yale University as the neotype of obtusus. 
The differences between the fore and hind wings of Misthodotes 
and the nature of the cubital-anal area of the wings have not been 
definitely known. From a survey of all the Elmo specimens in both 
the Peabody Museum and the MCZ collections, I believe that we 
can now make a better diagnosis of the genus than has previously 
been possible and it seems advisable to summarize that before con¬ 
tinuing with the account of the Midco specimens. 
The best specimen of the fore wing of obtusus from Elmo is MCZ 
4386, which shows the complete venation, except for the cubital- 
anal region (figure 12). It should be noted that the costal area near 
