io6 
Psyche 
[June 
fore wings are tegminous and their shape, sculpturing, as well as the 
remnants of the veins, recall the Protocoleidae. In Dermelytridae, 
n. fam., the venation is the most reduced in the Protelytroptera, so 
far known. The veins are only weakly indicated at most, never show- 
ing the whole venational pattern. The fore wings are elytra-like in 
shape and convexity, but with very little sclerotization. The origin 
of Dermelytridae, n. fam., remains uncertain so far because of its great 
specialization. 
Probably belonging to the Dermelytridae is the specimen designated 
(without figure) by Tillyard (1924) as Permophilus (?) minor. 
Genera included: Dermelytron, new genus; Psychelytron , new 
genus; Chanos elytron, new genus. 
Genus Dermelytron, new genus 
Fore wing: more or less oval, convex but very little sclerotized; 
sutural margin broad; costal expansion projecting only very little; 
setae making patches in the subcostal area; apex directed posteriorly; 
anterior margin strengthened, convex, very slightly concave beyond 
the costal expansion; posterior margin slightly concave; CuP and one 
of the anal veins sometimes weakly indicated. 
Relationship. Dermelytron, n. gen., differs from Chanos elytron, n. 
gen., by the smaller costal expansion and oval shape of the fore 
wings. From Psychelytron , n. gen., it differs in posteriorly directed 
apex. 
Stratigraphic occurrence: Upper Permian of Australia. 
Type-species: Dermelytron conservativum, n. sp. 
Dermelytron conservativum, n. sp. 
Text-figure 11 
Fore wing: 50-7.2 long and 2.5-3. 1 turn, broad, uniformly darkly 
colored ; setae making two small patches in the subcostal area ; apex 
rounded. 
Relationship. Dermelytron conservativum, n. sp., differs from Der- 
melytron pigmentatum , n. sp., in the uniformly dark pigmentation 
of the fore wing, without darker spots, and in the rounded apex. 
Holotype : No. In 45725 (reverse). Specimens No. In 45514, 
In 45768, In 45522, In 32758 are also the same species. British 
Museum (N.H.), London. Collected in Upper Permian, Belmont, 
N.S.W. 
