468 
Psyche 
[December 
area and slightly convex just before the apex. Sc terminating at 
the end of the second third of the wing on R; Rs with 3 branches, 
first of them forked ; MA slightly concave soon after its origin ; 
MP with 2 branches arising anteriorly. CuA slightly concave in 
the first third of its course, CuP forked; cua-cup area very broad; 
anal area with about six parallel branches, not widely spaced. 
Cross veins not very dense, sometimes connected. Stronger and 
more regular cross veins in the anal area and also in rs and m 
areas. Long hairs are present in a cluster in the r-m area at the 
base and bordering the proximal part of the anterior margin and 
the whole posterior margin. Cuticular thickening in rows probably 
present. 
Breyeria boulei differs from lachlani as previously indicated. 
Family Eugereonidae Handlirsch 
Eugereonidae Handlirsch, 1906: 388; Carpenter, 1964: 104. 
Dictyoptilidae Lameere, 1917: 194. 
Peromapteridae Handlirsch, 1906: 79; Handlirsch, 1919: 11; Handlirsch, 
1921: 130. 
Type genus: Eugereoji Dohrn, 1866 (Lower Permian of Ger- 
many). 
The family Eugereonidae has been recently (1964) reviewed 
by Professor Carpenter, who synonymized the Dictyoptilidae with 
it and discussed E tiger eon and the Commentry genus Dictyoptilus. 
Details of that study are not repeated here. On the basis of my 
own studies of Commentry material, I am adding certain details on 
the structure of the wing base of Eugereonidae and the related 
family Calvertiellidae which were not included in previous papers 
(Carpenter 1964, Kukalova 1964). To keep the revisional study 
as nearly complete as possible I am including in this paper figures 
of all Commentry Eugereonidae (Figures 42, 43, 44, 45). 
The Eugereonidae are made spectacular by the more or less 
pronounced reduction of the hind wings, which often (to varying 
degrees) differ from the fore wings in shape and venation. The 
tendency to reduce the hind wings apparently occurred repeatedly 
in families of Palaeodictyoptera. Sometimes, the hind wings are 
broader but slightly shorter (Dictyoneuridae, Mecynostomatidae, 
some Spilapteridae) while in others the hind wings are as long 
as the fore wings but are narrower (Lycocercidae) . Extremely 
shortened hind wings are so far known in two families — Eugereoni- 
dae and Megaptilidae. 
Within the Eugereonidae, as understood in this paper;, the 
