350 SAMUEL II. si l DDl.l; ON THE 



A few species which have been mentioned; figured or described ;is coming from paleozoic 

 rocks have not been introduced above and may Jiere be briefly referred to : — 



Wuephemerites primordialis Scudd. (Proc. Bost. Soe. Nat. Hist., xix. 248-249), is no in- 



sed at all. but the ball' of a leaf of Cyclopteris. 



The three species which I described briefly and figured poorly in the Geol. Surv. 111., vol. 

 m. under the generic name of Ephemerites (wrongly printed Euphemerites) are also prob- 

 ably plants. 



TAbellula carbonaria Scudd. (Can. Nat.. (2) vm, SS-89, fig.), as a recent examination 

 shows, is more probably the abdomen of an Arachnid, one of the Anthracomarti. 



Termitidium amissum Gold. (Faun. Saraep. Foss., n, 17. pi. 1. fig. 6), is too fragmen- 

 tary to be of any value, and it would be impossible to determine its position, 



Termitidium rugosum Gold. (Ibid. pi. 1, fig. 14). which Dohrn first described as perhaps 

 the remains of an orthopteron (Palaeontogr., xvi, 184, pi. 8, fig. 4). shows no vein attach- 

 ments, and is, therefore, of very uncertain position. 



Corydaloides Seudderi Brongn., (Bull. Seances Soc. Ent. France, 1885, p. xiii) has not 

 yet been figured and the description of it is only provisional, so that its precise position 

 cannot be discussed at present. A photograph Mr. Brongniart has kindly sent me shows 

 that it is an interesting insect. 



I venture to add the figure of an obscure fossil (pi. 32, fig. 2) showing most of the veins 

 of the two overlapping wings, but generally without their attachments, so that their rela- 

 tion to each other cannot be determined ; it is impossible to say until further material is 

 at hand where it belongs. It was found by Mr. R. D. Lacoe near Pittston, Penn., in coal 

 C of the Boston Mine and bears the number 2029 in his collection. 



A species to which I had given the MS. name of Termes longitudinalis (see Lacoe's list 

 of paleozoic insects, p. 15) is omitted here, because from an accidental circumstance it could 

 not be obtained for reexamination before the plates went to the engraver. It is not a 

 Termes and will be considered on a future occasion. 



Explanation of the Plates. 

 Plate xxix. 



Fig. 1. Gerapoiiijms blattinoides, §, Mazon Creek, 111. Drawn by J. H. Blake. 

 Fig. 2. Archegogryllus priscus, leg, f , Talmadge, Ohio. Drawn by S. H. Scudder. 

 Fig. 3. Archegogryllus priscus, wing, •t r 2 -, Talmadge, Ohio. Drawn by J. H. Emerton. 

 Fig. 1. Eucaenus ovalis, f. Mazon Creek, 111. Drawn by Kalheriue Peirson. 

 Fig. 5. Gerapompus extensus, £, Mazon Creek, 111. Drawn by Katherine Peirson. 

 Fig. 6. Didymophleps contusa, -j-, Vermilion Co., 111. Drawn by .1. S. Kiugsley. 

 Fig. 7. Cheliphlebia elongata, $, Mazon Creek, 111. Drawn by Katherine Peirson. 

 Fig. 8. Gerapompus extensus, J, Mazon Creek, 111. Drawn by Katherine Peirson. 

 Fig. 9. No. 2055. Sec p. 325, f, Mazon Creek, 111. Drawn "by S. F. Denton. 

 Fig. 10. Dieconeura rigida, f, Pittston, Penn. Drawn by J. S. Kingsley. 

 Fig. 11. Genopteryx constricta, f , Mazon Creek, 111. Drawn by Katherine Peirson. 



