1890 .] 
569 
[Scudder. 
not only from the modern types, but from the European tertiary 
insects. This feature is the great length and slenderness of the 
stigmatic cell, due to the removal of the base of the stigmatic vein 
to the middle (or to before the middle, sometimes even to the base) 
of the long and slender stigma and its slight curvature ; and it is a 
fact of particular interest in this connection that in the only wing 
we know from the secondary rocks precisely this feature occurs, as 
illustrated in Brodie’s work (see pi. 4, fig. 3). So, too, the cu- 
bital space is largely coriaceous, so that the postcostal vein maybe 
considered as exceedingly broad and merging eventually without 
the intervening lack of opacity, into the stigma proper. As a gen- 
eral rule, the wings are also very long and narrow, and the legs ex- 
ceedingly long. In all these characteristics the American plant 
lice appear as a rule to differ from the forms so far described from 
the European tertiaries. 
The single winged species figured by Berendt from amber, how- 
ever, shows precisely this character as far as the length of the stig- 
matic cell is concerned, which is about two-fifths the length of the 
wing. It will be interesting to know whether the other species of 
the Baltic amber will show a similar departure from the condition 
of the stigmatic cell in modern types. Not a single one of the 
Florissant forms can be referred to an existing genus. 
The Fulgorina are fairly well represented in tertiary deposits 
and by a considerable variety of forms, all the subfamilies being 
represented except the Tropiduchida, Derbida and Lophopida ; 
and what is curious, each of the subfamilies is represented both in 
European and American strata, excepting only the Issida confined 
to Europe and the Achilida found only in America, each by a single 
species, the one in Radoboj, the other at Florissant. America is 
far richer than Europe both in the number and diversity of its ful- 
gorine fauna, but especially in the diversity. About half the Eu- 
ropean species have been referred to Cixius alone, and Diaplegma, 
a genus of Cixiida, is the most abundant American type. 
With onty a single exception, all the fossil species of Jassides 
that have been recognized in tertiary deposits of any kind have 
been drawp from the subfamily Jassida as Stal separates them. 
This is equally true when we extend the ground to America which 
possesses half as many species as Europe, and as already stated is 
the more remarkable here since the Membracida are now such a 
prevailing type in North America. Again, the vast proportion of 
