1983] 
Burnham — Geraridae 
23 
type specimens, I find no characters by which to separate either 
genus from Gerarus. Because there are no significant differences in 
venation between R. inopinus, G. constricta and G. danielsi (com- 
pare fig. 6 with fig. 7), synonymy at this point seems justified. 
Rossites inopinus FMNH PE 3304. Specimen examined. Obverse 
and reverse halves. Only the basal half of the hind wing is preserved, 
but it shows CUA and CUP very clearly. Length of the wing as 
preserved measures 29 mm; actual length is estimated as 40 mm. 
New material 
FMNH PE 5276. Obverse and reverse halves. This specimen is, 
without doubt, the most spectacular of all specimens examined for 
this study. Both halves are excellent, and the obverse half gives a 
particularly good three-dimensional effect (see fig. 11). The latter 
also shows the entire prothorax and part of the head. The base of 
the vertical spine at the anterior end of the prothorax may be seen in 
the reverse half. Parts of all three legs are visible in the specimen and 
unequivocally demonstrate the gracile nature of the femora. 
FMNH PE 31973. Obverse and reverse halves. An almost perfect 
specimen of a single G. danielsi fore wing. The apex of the wing is 
missing, but the anal area is remarkably well preserved in this 
specimen. 
FMNH PE 31988. Obverse and reverse halves. This is a poor 
specimen: fore and hind wings overlap, and are only partially pres- 
ent. However, venation and size both place it in G. danielsi. 
FMNH PE 32023. Obverse and reverse halves. This is not a well- 
preserved specimen, but venation and size both conform to the 
species description. 
FMNH PE 32027. Obverse half. The prothorax, pterothorax, and 
basal areas of the right hind wing and left fore wing are evident. The 
prothorax bears the characteristic arrangement of nine spines and 
also has a tiny lateral spine projecting from its anterior left side. 
Although smaller than the other specimens in this species (width of 
fore wing is 12 mm) it is included in G. danielsi because it is, in all 
other respects, identical to the holotype. 
FMNH PE 32029. Obverse and reverse halves. This specimen, 
which has an impressive array of spines on the prothorax, and a 
vertical spine at its anterior tip, is magnificent. Hind wings are pre- 
served, but overlap. 
