338 
Psyche 
[September-December 
to several cross veins in the costal area; branching of RS variable; 
in some specimens R2+3 and R4+5 are forked but in others they 
are simple; branching of M+CUA also variable. 2 CUP is close to 
1A and appears to follow the anal fold for most of its length. 
Holotype: no. 15561, Peabody Museum, Yale University. As 
shown in Tillyard’s figure, this consists of a poorly and incom- 
pletely preserved fore wing, lacking the posterior region and hav- 
ing most of the veins faintly preserved. I have carefully studied 
this specimen and I find no clear evidence that R1 is forked, as 
shown in Tillyard’s figure; the anterior veinlet shown is almost 
certainly one of the several cross veins in that area. Also, M+CUA 
does not coalesce with RS as figured by him; there may be a short 
connection between these two veins, though it is not visible in 
any specimen. 
Two additional fore wings of problematica are now at hand and 
have been used in part as the basis of the foregoing description of 
the genus and species. One of these, no. 5895ab, Museum of Com- 
parative Zoology, consists of a complete and very well preserved 
fore wing (figure 1). It is the same size as the type and differs only 
in the number of branches of RS and M: R2+3 is deeply forked 
and there is one less terminal branch of M. However, these are 
the kinds of variations that usually occur within species of orthop- 
teroids (see Carpenter, 1966). It should also be noted that in this 
fossil CUA is directed distally at its termination, away from CUP, 
not towards CUP; this is probably correlated with the absence of 
the terminal fork on CUA. The anal area is not sharply marked 
off, except for the slight indentation of the hind margin at the end 
of CUP. The cross veins are only faintly preserved in this fossil; 
in the accompanying figure only those that can positively be dis- 
cerned are shown; others may be present, as indicated in the other 
specimens of this insect. 
The second new specimen consists of an incomplete wing, no. 
YPM 27536, Peabody Museum, Yale University (figure 2). It is 
slightly larger than the other two specimens, with a length of 12 
mm and width of 3.5 mm. The differences between this specimen 
2 It is not possible to distinguish between the branches of these two veins (M and 
CUA), since they do not show convexities or concavities. I have arbitrarily as- 
sumed that the last fork of M+CUA comprises CUA, and the other branches, M. 
