98 
Psyche 
[June 
Relationship. Austrelytron , n. gen., differs from the genus Proto- 
coleus and Phyllelytron , n. gen., by having fewer branches on veins, 
less numerous cross veins and by the nature of the tubercles, which 
are not flat and numerous, but pointed and isolated, and also ar- 
ranged in rows on the veins. 
Stratigraphic occurrence: Upper Permian of Australia (N.S.W.). 
Type-species: Austrelytron tillyardi n. sp. 
Austrelytron tillyardi, n. sp. 
Text-figure 5 
Fore wing: 11 mm. long, 4 mm. broad; sutural margin narrow; 
tubercles pointed, forming regular rows on the veins; the areas be- 
tween the veins covered by dense granulation and very isolated, ir- 
regularly distributed tubercles; costal expansion projecting only a 
little; branches of R very irregular, distinct, connected with few cross 
veins; all main veins distinct; R straight, Ri directed anteriorly 
towards costal margin well before apex ; Rs well developed ; M 
branched, fused for a long distance with the simple CuA; CuP long, 
straight, concave; anal veins simple, of irregular form. 
Holotype: No. In 45525 (obverse). British Museum (N.H.), 
London. Collected in Upper Permian, Belmont, N.S.W. 
Family Permophilidae Tillyard, 1924 
Permophilidae Tillyard, 1924, Proc. Linn. Soc., N.S.W. 49:434 (Coleoptera) ; 
Laurentiaux, 1953, Traite de paleont. 3:475 (Paracoleoptera) ; Carpenter, 
1954, Classification of Insects, p. 824 (Coleoptera). 
Diagnosis. Fore wing: tegminous, only slightly convex; sutural 
margin well developed ; wing surface covered on both dorsal and 
ventral surfaces by dense granulation and isolated, more or less dis- 
tinct tubercles, sometimes more frequent in the basal part; setae 
present in a distinct patch; costal expansion projecting, circular; wings 
narrowed abruptly before the pointed apex; venation much reduced, 
restricted to the basal part of the wing, in the distal part completely 
missing. 
Relationship. Tillyard (1924) established the new family Permo- 
philidae, which he considered to be coleopteroid, ancestral to recent 
Hydrophilidae. According to his description, the type-species, Permo - 
philus pincombei Tillyard, 1924, is large in size (21 mm.) with 
pointed apex, without definite longitudinal striae, but with traces of 
delicate, branching venation here and there, with the surface fur- 
nished in several places with very weakly formed, flattened tubercles. 
