7« 
Psyche 
[March 
Text-figure 15. Oedischia williamsoni Brongniart. Original drawing, 
based on type in Inst. Paleont., Paris, pc is the precostal area. 
sented in any Permian deposit. In the Elmo limestone there is one 
genus which appears to belong to the Oedischiidae and which is 
close to Metoedischia from the Permian of the Soviet Union. There 
are also representatives of three other families, two of them new. 
It should be noted that there are many additional orthopteroids 
present in the Yale and Harvard collections from the Elmo lime- 
stone, almost all of them undescribed. But none of them, so far as 
can be determined now, belong to the Orthoptera. They will be 
treated in the next part of this series of papers. 
Family Oedischiidae Handlirsch 
Oedischiidae Handlirsch, 1906, p. 700. 
Fore wing: usually thin, only slightly coriaceous; precostal space 
well developed ; Sc extending well beyond mid-wing, with several 
branches; M dividing at about a third of the wing-length from the 
base into MA, which is not clearly convex, and MP, which is mark- 
edly concave; MA usually anastomosed with Rs; Cu forked near 
the base, the posterior branch, CuP, strongly concave; the anterior 
branch (CuA) forking at least once, in part coalescing with a cross 
vein leading from M, and eventually forming several branches which 
lead to the hind margin; CuP unbranched; at least three anal veins; 
cross veins numerous, in some species forming a reticulation in certain 
parts of the wing. (See text-figure 15) 
Hind wing unknown. Body unknown, except for legs; hind legs 
long and modified for jumping. 
This family is known from the Upper Carboniferous of France 
(Commentry) and Germany and the Permian of USSR and pos- 
sibly Czechoslovakia. The species described below constitutes the 
first record of the family in North American deposits. 
Unfortunately, almost all specimens of Oedischiids consist of iso- 
lated wings. The type-species of Oedischia ( williamsoni Brong- 
niart) is represented by two fragmentary specimens showing the fore 
