1962] 
Sharov — Lithophotina 
103 
wing, R has 4-5 branches in pectinated form, which are directed 
toward the fore margin. MA at the center of the wing length forms 
two branches, of which the fore branch divides again close to the 
apex, and the hind one forms two short branches at the very apex. 
The vein MP is merged with CuA and its base apparently forms 
one of the cross-veins. MP + CuA dichotomizes and forms seven 
branches. 
Between R, M and their branches there is a double row of cells. 
The anal portion in the holotype is missing; evidently it was torn 
off while the wing was being carried by currents of water before it 
was buried. The longitudinal and cross-veins are colored with brown 
pigment. 
The hind wing (Figure iB) was found by G. M. Byers in July 
of 1953 in the same deposits at the Park County station. The length 
of the hind wing is 18 mm. The different character of the venation 
of the fore and hind wings, and also the ratio of the length of the 
fore wing to the length of the hind wing of L. floccosa, is very close 
to that of Chaeteesa filata Burm. (Figure 2), which is the reason 
for placing the specimen of the hind wing found by G. M. Byers in 
the same species, i.e. L. floccosa. 
Sc ends at a distance less than two-thirds of the length of the 
wing from the base. R has three oblique branches. Rs is simple and 
does not branch. M is joined with R only at the base of the wing, 
proximal to the beginning of MP. MA forms three branches in the 
same sequence as in the fore wing. MP has the character of a cross- 
vein but is stronger in comparison with the other cross-veins. MP + 
CuA forms three branches. In the distal portion of the wing between 
the longitudinal veins there is a double row of cells. Both the longi- 
tudinal and the cross-veins are colored with brown pigment. 
Although there is no doubt about the closeness of the Manteodea 
to the Blattodea, the interpretation of the venation of the former, 
particularly with respect to the hind wing, remains questionable (see 
Smart, 1956, p. 550). In such cases the study of fossil material is 
extremely desirable, and the fossil representative of the Manteodea 
examined here actually permits a simple solution of some debatable 
questions on the venation of these insects. (See figure 2). 
Chopard (1949) and Ragge (1955) find an independent RS in 
the fore wing of some Manteodea, the nature of which becomes clear 
upon examination of the fore wing of Lithophotina, where R has 
the same type of pectinated branching as in most Blattodea. In 
Chaeteesa, as Smart (1956) has correctly noted, the remains of these 
