1969] 
Kukalova — P alae o diet y opt era 
18 
Homaloneura lehmani, sp. nov.* 
Figure 8 
The holot3^pe of this species is Brongniart’s 17-15, which was 
figured by him in 1893 as H. ornata\ the specimen is in the Institute 
of Palaeontology in Paris, where I was able to make a careful exam- 
ination of it. The specimen is very well preserved and shows the 
complete insect with four wings and many details of body structure. 
It is the only specimen of Palaeodictyoptera so far found which shows 
the beak in a bent condition; it suggests flexibility of the sheath and 
the tendency for the stylets to remain together. Another unusual 
structure is the presence of vestigial, almost scale-like, sclerotized 
prothoracic lobes, completely without venation. The clypeus is prob- 
ably better preserved than that in any of the specimens of Palaeo- 
dictyoptera from Commentry, and it shows the very fine parallel 
striations which make a continuous series of bands. 
Wings subequal in length, the hind pair somewhat longer. Wing 
membrane relatively strong, dark ? with transverse light bands. Cuticu- 
lar thickening strengthening Ai for a short distance in the region 
of its curve towards the posterior margin. Supporting r-m cross 
vein weak, running obliquely from the stem of M to the very base 
of Rs. Main veins with many short branches. Fore wing: length 
23 mm, width, 7.2 mm ; broadest shortly beyond midwing, narrowing 
towards the base; apex pointed, the apical part curved posteriorly; 
posterior margin slightly convex just before apex; Rs with 6-7 
pectinate, simple branches; MA forking three times; MP forking 
3-5 times; CuA with 3-5 pectinate branches, often forking; CuP 
with two forks; cubital branches in fore wing arranged very ob- 
liquely; about 5-6 anal veins, mostly forked; cross veins few, weak. 
Hind wing: length 23 mm, width 9 mm. Anal area abruptly ex- 
panding just beyond the wing base. 
Body structures: Head 1.5 mm long, broader than prothorax. 
Eyes very large, 1.5 mm long, projecting. Clypeus oval, with median 
ridge and about eight pairs of parallel transverse striae. Preserved 
length of beak 4.3 mm; prothorax narrowing anteriorly, about half 
the length of the mesothorax; prothoracic lobe length 2.3 mm, width 
2 mm; prothoracic lobes vestigial, heavily sclerotized, cordate, the 
venation completely absent, but with a longitudinal median furrow, 
terminating just below the apex of the lobe. Mesothorax as long as 
metathorax. Abdomen shorter than the wings; first segment slightly 
*Named in honor of Professor J. P. Lehman, Director of the Institut de 
Paleontologie, Paris. 
