SCUDDER. ] TERTIARY LAKE BASIN OF FLORISSANT. 283 
belonging to a new genus, has been described under the name of [- 
thymnetes guttatus. There are about the same number of Acridii, a sin- 
gle species of Phasmida, and two or three Blattariae, one of which has 
been described under the name of Homoeogamia ventriosus. But the 
mass of Orthoptera, including about 50 specimens and 8 to 10 species, 
belong to the Forficulariae; two of them, Labidura tertiaria and L. 
lithophila, have been described, but they are among the least interest- 
ing, several of the species exhibiting forceps of very great length; an 
entire plate has been devoted to them in a forthcoming report, with 
twenty-four figures, and theremaining Orthoptera, with nineteen figures, 
will occupy another. 
The Neuroptera are made up in large part of Phryganidae, but no 
larval cases have been preserved ; there are about 100 specimens repre- 
senting 15 or 20 species which are determinable, and which occupy one 
plate of the report and parts of others, including twenty-two figures; 
besides these there are several hundred which perhaps a severer study 
will classify; one species has wings 2 centimeters long, while others are 
minute; several of the subfamilies appear to be represented, true Phry- 
ganidae certainly, and probably Rhyacophilidae, Leptoceridae, and 
Hydropsychidae. 
The collections embrace seven genera and twelve species of plani- 
pennian Neuroptera, occupying one plate with fifteen figures. All of 
the species and four of the genera are new, and belong to five families. 
The Raphidiidae are the most numerous, embracing Raphidia with a 
single species and Inocellia with four; the species referred to Raphidia 
hardly belongs to it in a strict sense, since the costal vein is excessively 
short, there are no costal veinlets, and the sectors do not originate ob- 
liquely from the radius, but more indirectly by transverse veins ; all the 
species of Inocellia, which fall into two sections, differ from living types 
and also from the species found in the eocene amber of the Baltic, in 
having no transverse series of regular discoidal areoles below the ptero- 
stigma. A single species of Osmylus represents the Hemerobidae, and 
differs from living forms, as does also the amber species, in the simple 
character of the costal nervules, the much smaller number of sectors, 
and the limited supply of cross-veins in the basal half of the wing, giv- 
ing this region a very different appearance from its rather close reticu- 
lation in modern types. It may here be noticed as a very general rule 
that the neuration of the wing is much closer in modern Planipennia 
than in their tertiary representatives. There are four species of Chry- 
sopidae, referable to two genera, each of them extinct; Chrysopidae 
have not before been recognized in tertiary strata, the single species 
poorly figured by Andra, and never carefully studied, being much more 
probably one of the Hemerobidae; these two genera, called Palaeo- 
chrysa and Tribochrysa are allied to the living Nothochrysa, but differ 
from modern types in the zig-zag course of the upper cubital vein and 
in its direction, which is through the middle of the wing, as well as by 
the smaller number of sectors, and the entire absence of any transverse 
series of gradate veinlets; Palaeochrysa is represented by asingle species, 
Tribochrysa by three, and the genera differ from each other in the course 
of the upper cubital vein, which in Palaeochrysa is direct and bordered 
by comparatively uniform cells, while in Tribochrysa it is doubly bent 
in the middle, and is therefore bordered by very unequal cells. The 
single species of Panorpidae, referable to a new genus, has already been 
described under the name of Holcorpa maculosa ; it differs from Panorpa 
in the entire absence of cross-veins, and is remarkable for the spots on 
the wings. No planipennian Neuroptera have been found in the Green 
