78 THE CLASS OF INSECTS. 



In the Coal-lx'cls of Xew Brunswick and Xova Scotia, Dr. 

 Dawson, Mr. Barnes, and Professor O. C. Marsh liave discovered 

 several interesting Neuropterous and 

 Ortho})terous insects ; among them a 

 Cockroach, Archinndacris Arodica (PI. 

 1,* fig. 2). In Europe, Carboniferous 

 insects have been discovered at AVettin, 

 Saarbriick, etc. 

 The insects from these two fonn- 

 ations show^ a tendency to assume gigantic and strange shapes. 

 They are also comjyrehensive types, combining the characters of 

 different families and even different suborders. The most re- 

 markable instance is the Eucjereon Boecldngii Dohrn, from the 

 Coal Formation of Germany. It has been referred by Dr. 

 Hagen, with some doubt, to the Hemiptera, from its long im- 

 mense rostrum into which all the mouth-parts are produced, the 

 labium ensheathing them as usual in the Hemiptera. Its fore- 

 legs are large and raptorial ; but the filiform manj'-jointed an- 

 tennae, and the net-veined wings are Neuropterous characters. 

 Hence Dohrn considers it as a comprehensive t^-pe uniting 



* EXPLANATION OF PLATE 1. 



Fig. 1. Micmiia Sronsoni. A Neiiropterous insect found in iron-stone concre- 

 tions in tlie Carboniferous beds at Morris, Illinois. The figure is magnified one- 

 third, and has all its parts restored; the dotted lines indicate the parts not existing 

 on the stone. Reduced from a figure in the Memoirs of the Boston Society of Xat- 

 ural History, Vol. I. 



Fig. 2. Archimulacris Acadica. Wing of a Cockroach observed by ]\Ir. Barnes 

 in the coal-formation of Nova Scotia. 



Fig. 3. Platephemera antiqua. A gigantic May-fly obtained by Mr. llartt in the 

 Devonian rocks of New Brunswick. 



Fig. 4. Xylohius sigillarUc. The Myriapod (or Gally-worm) Icmnd in the coal- 

 formation of Nova Scotia, by J. W. Dawson. Copied from a figure in Dr. Dawson's 

 Air-breathers of the Coal-period. Magnified. 



Fig. 5. Lithentomnm Hdrtii. A Neuroptei'ous insect, the specimen first dis- 

 covered by Mr. Hartt in the Devonian roclis of New Brunswick. This fossil, and 

 those accompanying it, are the oldest insect-remains in the world. 



Fig. 0. Three liicets from the eye of an insect, considered by Dr. Dawson a 

 Dragon-fly. It was found in coprolites of reptiles in the rocks containing the My- 

 riapod, represented in Fig. 4. Copied from Dr. Dawson's figure, greatly magnified. 



Fig. 7. IJomothetus fossiUs. A Neuropterous insect from the Devonian rocks of 

 New Brunswick ; it was discovered by Mr. Hartt. 



Fig. S. napJnphlchium Barnesn. A curious Neuropterous insect, of lai'ge size, 

 probably allied to our May-flies; taken by Mr. Barnes from the coal of Cape Bre- 

 ton. 



These figures, with the exception of 1, 4, and 0, are of life size, and borrowed 

 from the new edition of Dr. Dawson's Acadian Geology. 



