280 BULLETIN OF THE 



field. Therefove it does not belong to the wing. Several fainter cross veins — 

 I have counted six — ai'e therefore very doubtful, the more as some are only 

 to 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 i'orked, 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 bv 

 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 15 mm., the breadth 5 mm., 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 indications 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 Hemerobidae. A light impression around the wing 

 on the slab suggests perhaps the presence of another wing, a little larger and 

 blunth' 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 of it. The vena- 

 tion of the base is much disturbed bj' 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 crystallized parts of the stone are 

 easily explained, as such occurrences are found commonly in the alxlomen 

 of Odonata and other insects from Solenhofen, and in the mouth parts of 

 Engereon. 



I am not able to classify the insect except tliat 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 P.seudoneuroptera, the upper connection is entirely different, 

 and by a straight cross vein, which is not to be found here. Only some Ptero- 

 narcys belonging to the PerlidsB have a connection somewhat similar to that 

 of the Xenoneura. What we see of the venation 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 Mantispida;, to the genera Trichoscelis and 

 Symphrasis, namely, to the costal half of S. vnria. Tlie venation has no simi- 

 larity to Coniopteryx, Raj)lnilia, and Ephemera, and bridges in no way the gulf 

 between the Neuroptera and P.seudoneuroptera, as stated by the author. 



