23 
Homoptera. 
A number of Homoptera from the Eocene of Rocky Mountains 
has been described first by Scudder and later on by Cockerell, 
whilst Homopterous finds from the old world are scanty. They only 
consist of a Hammapteryx anglica from England (Cockerell), a Cer- 
copidium rugulosum from Greenland (Heer), and an undetermined hind 
wing from Scotland (Gardner). 
In cement-stone remains of 5 species of Homoptera now have 
been procured, one specimen of each. It has been proved that they 
all may be referred to the superfamily Fulgorina and within this to 
relatively the Ricaniidœ , the Flatidce and the Cixiidce. 
Ricaniidæ. 
Hammapteryx paucistriata n. sp. 
The find represented in fig. 12 according to the many cross¬ 
vein sin the costal membrane must belong either to Ricaniidœ or 
Flatidœ , the two Fulgorin families with many cross-veins in the costal 
area. Unfortunately the anal area of the wing with the most dis¬ 
tinctly separating family characters is missing, but the curious up¬ 
wards curve of the distal part of Subcosta, the anterior branch of 
which even completely coalesces with Costa, is only met with in a 
certain number of genera within the Ricaniidœ , and not in any Flatid, 
although Médius being much more richly ramificated than Cubitus 
perhaps might be suggestive of the reverse. 
The form described here so completely agrees with the Tertiary 
(exclusively Eocene) Ricaniid genus Hammapteryx that I do not 
hesitate in referring it to this latter. Within the Hammapteryx 
genus 4 American species are at present known: H. reticulata 
Scudder, H. tripunctata Cockerell, H. (?) lepidoides Cockerell, and 
H. (?) ceryniformis Cockerell together with a species from the Eocene 
deposits of England: H. anglica Cockerell. From the first 4 forms 
it is distinguished by the relatively few longitudinal veins in the 
apical part of the wing, and from the last one, at any rate, by the 
low costal membrane. 
Wing relatively narrow in proportion to length; costal membrane 
rather narrow with ca. 30 cross-veins. Costal vein joins the costal 
margin a little distally to the outermost third part of the wing. The 
anterior branch of Subcosta joins with Costa at about three fifths 
of the wing, measured from base, whilst its posterior branch soon 
bifurcates, and the anterior branch of this latter bifurcation is strongly 
opistocurved and once more bifurcated. Radius issues from the basal 
