1976] 
Carpenter — Permian Insects 
341 
SC 
Figures 4 and 5. Opisthocladus. Fig. 4, O. arcuatus, n.sp.; drawing of fore wing, 
based on holotype, no. 5882ab, M.C.Z. Length of wing as preserved, 13 mm. Fig. 
5, O. strictus, n.sp.; composite drawing of fore wing, based on both wings of holo- 
type. Length of wing as preserved, 7 mm. 
CUA for most of their lengths and by the branches of M arching 
abruptly from M+CUA before mid-wing. No close relatives are 
known. 
Family Tococladidae Carpenter 
Tococladidae Carpenter, 1966, p.76. 
This family was designated for a single genus and species, Toco- 
cladus rallus Carpenter (1966) from Elmo. Two other species, 
representing a new genus, are described below. One of these, 
Opisthocladus strictus, is of particular interest since it is based on 
a specimen that shows some details of the body structure, which 
has not previously been known in this group of Protorthoptera. 
