74 FOSSIL INSECTS OF THE BRITISH COAL MEASURES. 



So far I am in agreement with Handlirsch, but I regard the enlarged areas 

 between the inner divisions of the radial sector and the cubitus, and between the 

 cubitus and the anal veins, as more suggestive of the Protorthoptera, notably 

 Thoronysis ingbertensis, Amnion. More than this cannot be said, and PseiuLo- 

 fouquea cambrensis must be regarded provisionally as Palaeodictyopterid, with a 

 possibility of Protorthopterid or even Orthopterid affinities. 



INCERTtE sedis. 



Genus ARCHJEOPTILUS, Scudder. 



1881. Arch&optilus, Scudder, Geo]. Mag. [2], vol. viii, p. 295, 



A wing of unusually robust type. Only one is known, consisting of not more 

 than the basal fifth of a whole wing whose total length may have been 25"4 cm. to 

 35*5 cm. The fragment is too small for a correct determination of its systematic 

 position, and has been referred to widely separated families by various workers. 



Archseoptilus ingens, Scudder. Plate IV, fig. 9 ; Text-figure 23. 



1881. ArehseoptiluB ingens, Scudder, Geol. Mag. [2], vol. viii, pp. 295, 300. 



1883. Archseoptilus ingens, Scudder, Mem. Bost. Soc. Nat. Hist., vol. iii, pp. 217. 223, pi. xvii, 



figs. 10—12, 



1885. Archseoptilus ingens, Brouguiart, Bull. Soc. Amis Sci. Nat. Rouen [31, ami. xxi, p. 60. 



1885. ArchaeoptUm ingens, Scudder, Zittel's Handbuch der Palaeoutologie, vol. ii, p. 757. 



1893. ArcJuvopt litis ingens, Brouguiart, Faune Eiitom. Temps Prim., p. 498, pi. xxxvii, fig. 6. 



1906. Arehseoptilus ingens, Handlirsch, Die Fossilen Iusekten, p. 117, pi. xii, fig. 18. 



Type.— Basal fifth of wing, in counterpart; British Museum (no. I. 3997). 



Horizon ami Locality. — Middle Upper Coal Measures; between Shelton and 

 Clay Lane, near Chesterfield, Derbyshire. 



Specific Characters. — Wings very large ; costa, subcosta, and radius broad 

 and robust. The costal border spiny. Interstitial neuration of stout transverse 

 nervures. 



Description. — Only the basal part of the wing and its counterpart are 

 preserved, having a total length of 43 mm., and a greatest breadth of 33 mm. 

 Seudder's estimate of the length of the whole wing as 35'5 cm. is probably 

 excessive. 



Scudder (lor. cit., 1881) thus describes the specimen: "All the principal veins 

 are a millimetre or more thick, and the cross-veins of the upper interspaces are 

 tolerably distant, stout, prominent, and generally simple. The marginal (costa) 

 vein, forming the front (outer) border of the wing is studded with short oblique 

 spines (? macrotrichia). The other veins lie at very different levels on the stone, 



