1964] 
Carpenter — Dictyoptilus 
107 
seems very similar to Eugereon cn the basis of the parts of the wings 
known in both genera. The basal portions of the fore wings are, in 
fact, so much alike that generic distinction is not apparent ; the hind 
wings, however, show a few differences, e.g. the area between Rs and 
MA in Eugereon is fully twice as wide as that of Dictyoptilus. 
The type-species of Dictyoptilus (renaulti) is known only from 
two specimens, each consisting of the middle part of a fore wing. 
However, the venational pattern included is so much like that of the 
type-species of Cocker elliella ( peromapteroides) that the generic syn- 
onomy given above seems obvious. 
Dictyoptilus is at present known only from the Commentry shales, 
in France. Two species (sepultus and peromapteroides) have been 
described in addition to renaulti. These are quite clearly very close 
and might well belong to one species. However, since the specific 
names, which have already become established in the literature, pro- 
vide convenient means of referring to individual specimens, I am 
treating them as distinct. 
Dictyoptilus renaulti Brongniart 
Dictyoptilus renaulti Brongniart, 1893, Recherches. Hist. Ins. Foss.: 391, pi. 
22, figs. 13,14; Lameere, 1917, Mus. Nat. Hist. Natur., Bull. 23:103. 
This species was based on the two specimens (herein designated 
22-13 and 22-14) figured in Brongniart’s Recherches, each repre- 
senting middle portions of a wing. Specimen 22-14 was examined by 
me at the Museum National, but 22-13 could not be found in the 
collection. The former is presumably part of a fore wing, on the 
basis of its venation ; 2 the venation of the hind wing beyond the basal 
part is unknown in Dictyoptilus. 
Brongniart’s figure of this fossil is correct, as noted by Lameere 
2 Brongniart’s figure shows a minute fragment of another wing in front of 
the wing of renaulti , which suggests that the latter was a hind wing. How- 
ever the venation of specimen 22-14 is not like that of a hind wing, as known 
in peromapteroides \ and the figures in Brongniart’s Recherches, although 
generally accurate so far as the fossils are concerned, are often imaginary 
with respect to the presence of other fossils on the individual pieces of shale. 
See Carpenter 1943, p. 529-530. 
Explan at on of Plate 13 
Fig. A. Dictyoptilus sepuHus (Meunier). original drawing of fore wing 
based on type in Laboratoire do Paleontologie. Paris. Fig. B. Dictyoptilus 
peromapteroides (Meunier) original drawing of hind wing based on type 
in Laboratoire de Paleontologie, Paris. 
Lettering: c. costa; Sc. subcosta; RI. radius; RS, radial sector; MA anter- 
ior media; MP, posterior media; CuA, anterior cubitus; CuP, posterior 
cubitus; — , concave veins; If, convex veins. 
