76 
Psyche 
[March 
margin beyond Sc; costal space forming the basal, posterior lobation 
as in rotundum ; Ri with one or more distal branches; C11A2 absent 
as a distinct vein; area between CuA and CuP small; cross veins 
much as in rotundum. Pronotum broad, with curved lateral exten- 
sions; anterior border concave; with very little extension; no pos- 
terior extension. Head of moderate size. 
Holotype: No. 2137, Museum of Comparative Zoology, collected 
in lower layer of the Elmo limestone by F. M. Carpenter. This 
consists of a complete insect, showing both fore wings and parts of 
the body. Unfortunately, the hind wings are overlapped and rest on 
the abdomen in such a way that their venation cannot be untangled. 
This species differs from rotundum and maculosum by its much 
smaller size, broader fore wing, relatively longer Sc, the apparent 
loss of CuA2 and the presence of a smaller space between CuA and 
CuP. 
The preservation of both fore wings enables a comparison of the 
venation of the two wings in this one specimen. As can be seen 1 in 
figure 10, there are differences in the branching of all main veins in 
the two wings, especially of MA, MP, and CuA. In all probability 
the coalescence of MA with Rs is subject to similar fluctuation, al- 
though it occurs in both wings. The prothorax is clearly preserved, 
showing the pronotum proper and the thin, lateral extensions. As 
shown in the figure, the extensions are absent posteriorly and are 
scarcely present anteriorly, although they are well developed laterally. 
This is in contrast to the structure in the liomopterids as well as in 
the euryptilontids, in both of which the extensions are well developed 
posteriorly. 
The head is preserved in a dorsal view and shows no structural 
details, apart from indications of small compound eyes. 
Family Tococladidae, new family 
Fore wing: costal marginal; wing margin very nearly straight, 
narrowed basally; Sc extending to about mid-wing, with oblique, 
unbranched veins leading to margin; similar branches from R to 
margin beyond Sc; Rs arising well before mid-wing, with several 
long branches; M independent of R basally; MA with long, simple 
branches; MP unbranched; area between CuA and CuP traversed 
by numerous, strong cross-veins, not forming a reticulation; CuP 
nearly straight, not extending markedly along posterior margin ; no 
separate vena dividens; anal veins numerous and well defined; cross 
veins distinct and simple over virtually all the wing, including the 
