280 BULLETIN OF THE 
field. Therefore it does not belong to the wing. Several fainter cross veins — 
I have counted six — are therefore very doubtful, the more as some are only 
te-be seen near the margin. A little before the end of the costal field the 
mediastina turns in a sudden curve to the scapularis. The transversal vein 
going from the same spot to the costalis is not straight, as represented in the 
figure, but waved, much finer, perhaps forked, with indications of similar veins 
near by. Shortly before its end the costalis seems to start externally in a very 
acute angle another vein. This doubtful vein may belong to another wing, or 
it may be a dilatation of the costalis, or it could represent very long cilia, of 
which indications seem to appear.in other places. The fork, as it is called by 
the author, I believe to be represented only by a fragment of the wing, which 
lies above the main wing. The two veins nearer to the base (the external one 
believed to be the internal branch of the fork) belong to the main wing. The 
length of the main wing is about 15mm., the breadth 5mm., probably a 
little smaller than the dimensions given by the author (18 mm.). Formerly 
the insect was said to have an expanse of wings of two or two and a half inches. 
Of the basal part of the marginal field the marginal half seems to be broken 
off. I purposely say seems, because the slab shows here some indieations of 
breaking; but the costalis can be followed around the curve and partly on the 
narrowed part of the field. There are here indications of a recurrent vein, 
which is common in some Hemerobide. A light impression around the wing 
on the slab suggests perhaps the presence of another wing, a little larger and 
bluntly pointed. If this should be the case, the main wing would represent a 
hind wing, and what is to be seen of the base speaks in favor ofit. 'The vena- 
tion of the base is much disturbed by the circular elevated lines formerly sup- 
posed to represent a stridulating organ; a view now formally retracted by the 
author. It might be, as he states, a malformation on the base of the wing, or 
produced by something lying underneath. Perhaps the circular lines are the 
margins of the telescoped segments of the abdomen, which, if present at all, 
must have been here, In this case the more erystallized parts of the stone are 
easily explained, as such occurrences are found commonly in the abdomen 
of Odonata and other insects from Solenhofen, and in the mouth parts of 
Eugereon 
I am not able to classify the insect except that it belongs to the Neuroptera 
(sensu strictiori). "There is nothing in the venation similar to Pseudoneuroptera. 
When the mediastina ends before the tip and is connected with the costalis 
and scapularis in Pseudoneuroptera, the upper connection is entirely different, 
and by a straight cross vein, which is not to be found here. Only some Ptero- 
nareys belonging to the Perlidæ have a connection somewhat similar to that 
of the Xenoneura. What we see of the yenation is more nearly allied to the 
Chauliodes type than to any other. The mediastinal field is somewhat, re- 
lated to Sialis, but more to some Mantispide, to the genera Trichoscelis and 
Symphrasis, namely, to the costal half of S. varia, The venation has no simi- 
larity to Coniopteryx, Raphidia, and Ephemera, and bridges in no way the gulf 
between the Neuroptera and Pseudoneuroptera, as stated by the author. 
