Scudder — Fossil Insects of North America. 



177 



wing of a cockroach, and was found in the Coal Measures of Frog 

 Bayou, Arkansas, The fo lowing section, which I owe to the favour 

 of M. Lesquereux, will give an idea of its stratigraphical position : — 



Millstone Grit 



200-300 ft. 



Shale with Cordaites and wing of insect 



2 ft. 



Frog Bayou Coal 



2 ft. 



Sandstone with Sigillaria Siigmaria, etc. 



12 ft. 



1st Archimedes Limestone 



30 ft. 



Sub-Carhoniferous Sandstone 



30 ft. . 



2nd Archimedes Limestone 



1 



20 ft. 



An upper wing, quite similar to the foregoing in general appear- 

 ance, was recently discovered by Mr. James Barnes in the coal 

 measures of Pictou, Nova Scotia. It differs from Blattina venusta in 

 the curve of the costal border — affecting the direction of nearly every 

 vein in the wing — as well as in the extent and direction of the 

 mediastinal vein and in the distribution of the veins in the anal area. 

 Nor does it agree even generically, so far as I can determine, with 

 any of the fossil cockroaches enumerated by Giebel in his Fauna der 

 Vorwelt, so that I have considered it the type of a new genus. 

 Through the favour of Dr. Dawson, I have been permitted to examine 

 this fossil. It will be described and figured under the name of 

 Archimulacris aoadicus in the forthcoming edition of his Arcadian 

 Geology. 



Several years ago, a wing — possibly of the same species — was 

 found at the Joggins, Nova Scotia, by Professor Marsh, of New 

 Haven. According to his recollection, it was similar in appearance 

 to Lesquereux's Blattina, but it was packed away at the time of its 

 collection, and has never since been examined. 



Mr. Barnes has discovered another wing of very great interest ; it 

 was obtained in the Coal-measures at Schooner Pond, Cape Breton, 

 on Boss's Lease, two feet above a seam of coal. Dr. Dawson kindly 

 sent me a photograph of the wing; it will be described in his 

 Arcadian Geology under the name of Haplophlebium Barnesii. 

 The wing is quite well preserved, although the base is not present 

 and a portion of the apex is concealed by a fern leaf ; it is very long 

 and narrow, giving an expansion to the insect of fully seven inches. 

 The extreme simplicity of the neuration probably places this insect 

 among the EpJiemerina, although the form of the wing, and the reti- 

 culation which appears vaguely on the photograph, recall the 

 Odonata ; other features of the wing resemble the Odonata, and it is 

 not impossible that Haplophlebium forms a synthetic type, combining 

 essential characters of Odonata and EpTiemerina. 



3 See also Sill. Amer. Journ. Sc. and Arts. [2], xliv., p. 116. 



(To he concluded in our next.) 



