CLASSIFICATION OF PALEOZOIC INSECTS. :;i7 



In the other fragment particularly studied (fig. 10) there are two large spots, as before, 

 in the scapular-externomedian interspace, but they are more widely separated ; a single 

 large one in the interspace beneath, situated mid-way between the two ; but one of inter- 

 mediate size, though apparently belonging to the larger series, in the same interspace 

 nearly halfway between the inner and the margin. The smaller spots are distributed in a 

 very irregular and evidently meaningless way ; they are less frecpient than in the first 

 specimen found, but on the other hand there is a third series of mere dots, to the number 

 of twenty or more, scattered about the apical part of the wing in the scapular area and just 

 above it, below the apical branch of the mediastinal vein. A point unnoticed in the pre- 

 vious specimen, and perhaps from its preservation not discernible, is the fine but pro- 

 nounced serration of the entire costal margin (fig. 9), which is armed with a close-set series 

 of conical dentations, two or three times longer than broad, and separated by about their 

 own width from each other; they are about (1.30 mm. long. 



The wing in both specimens is of a dark brown color, the spots blackish brown, and the 

 interspaces broken by a fine weak tracery of delicate irregular veins, having a general 

 transverse disposition. 



The smaller fragment is 57 mm. long and 23.5 mm. broad; the larger 55 mm. long and 

 46 mm. broad, the latter being the breadth of the wing, the length of which was not far 

 from 80 mm. The smaller fragment appears to belong to an even larger wing. 



The original specimen was sent to me by Prof. A. H. Worthen, through Mr. L. Les- 

 quereux, and came from Mazon Creek. 111. The smaller came from the same place and was 

 sent me for study by Mr. Lacoe, in whose collection it bears the number 2025. 



Meganthentomum foimosum. 



Acridites formosum Gold., Fauna Saraep. Foss., u, 18-20, pi. 2, fig. 18. 



Megathentomum formosiim Scitdd., Proc. Bost. Soc. Nat. Hist., xviii, 359. 



This species differs from the preceding in the absence of sj)ots and dots, and in having 

 a more rounded and less triangular form and a more abundant branching, the externo- 

 median vein having four principal offshoots and thirteen ultimate veinlets against scarcely 

 more than half that number in the American form. Both have the same weak reticula- 

 tion and are of about the same size. 



Fischbach, Germany. 



[Hemipteroid Palaeodictyoptera.] 



A 



Eugeieon Eockingi. 



Eugereon Bockingi Dohbx, Palaeontogr., xm, 333-340, pi. 41, 

 Permian deposits of Birkenfeld, Germany. 



B 



Fulgorina Ebersi 



Fulgora Ebersi Dohrn, Paleontogr., xvi, 131-133, pi. 8, fig. 2. 



Fulgorina Ebersi Gold., Faun. Saraep. Foss., n, 28-30, 51, pi. 1, figs. 16-17. 



Carboniferous deposits of Saarbriicken, Germany. 



