1969] 
Kukalovd — Palaeodictyoptera 
171 
second segment is very indistinct. There are actually ten segments 
visible in this specimen. 
In PI. ornata , as well as in many other Palaeodictyoptera, the 
lateral parts of each tergite are separated by a longitudinal line from 
the main portion of the sclerite. The structural significance of this 
is not clear. Carpenter (1969, p. 306) suggests that they might be 
the actual ventral margins of the tergites, their impressions resulting 
from the flattening of the abdomen during preservation. On the other 
hand, they might be homologous with the so-called “lateral lamellae” 
of some mayfly nymphs, the function of which is apparently uncer- 
tain. 
Description of Genus 
Wings equal in length, or the hind pair a little longer. Wing 
membrane with variable color markings ( transverse bands spots, longi- 
tudinal stripes). Hind wing always broader in the proximal half, but 
similar in venation to the fore wing. Cuticular thickenings and r-m 
cross vein present. R without terminal branches, Rs pectinate; MA 
and MP forked several times; CuA with several branches, CuP 
simple or weakly forked. Cross veins not very numerous. 
Head about as broad as the prothorax; eyes large, projecting; 
clypeus large, oval, with median ridges and transverse striations; 
beak long; antennae long, thin, with long segments. Prothorax nar- 
rower than and about half as long as the mesothorax; prothoracic 
lobes cordate, with about ten veins, sometimes branched, and nu- 
merous cross veins; in some species the lobes are strongly sclerotized 
and the venation is not visible. Meso- and metathorax almost equal 
in length ; legs short and weak. Abdomen relatively narrow, shorter 
than the wings. Ovipositor short, cerci in the females robust, densely 
covered by hair; their structure in males is unknown. 
Species of Homaloneura present in the Commentry shales: H. 
elegans Brongniart, 1885 ; H. bonnieri Brongniart, 1893 ; H. punctata 
Brongniart, 1893; H. bucklandi Brongniart, 1893; and H. lehmani 
sp. nov. The genus is also represented in the ironstone nodules of 
Illinois (Westphalian) by H. dabasinskasi Carpenter, 1964. 
Homaloneura elegans Brongniart 
Figures 1 & 2 
Homaloneura elegans Brongniart, 1885: 66, pi. 3, fig. 2; Brongniart, 1893: 
318, pi. 17, figs. 11-12, pi. 18, fig. 1; Handlirsch, 1906: 108, pi. 12, 
fig. 2; Lameere, 1917: 147; Handlirsch, 1919: 20. 
The photograph of the type specimen was first published by Brong- 
niart in 1885 an d his figure (17-11), in 1893. Brongniart referred 
