74 FOSSIL INSECTS OF THE BEITISH COAL MEASUKES. 



So far I am in agreement with Handlirsch, but 1 regard the enlarged areas 

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

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

 Tln>i-uiii/xis iiif/l>t>rft'iix!x, Aminon. More than this cannot be said, and /V/i//,i- 

 /'iiiii/iK'it cambrensis must be regarded provisionally as Palreodictyopterid, with a 

 possibility of Protorthopterid or even Orthopterid affinities. 



INCERT^E SEDTS. 

 Genus ARCHJEOPTILUS, Scndder. 



1881. Arcli:n>]>til>is, Scudder, (leol. Mai,'. J2 ', vol. viii, p. 2'.'.V 



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 

 o5'5 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. 



Archaeoptilus ingens, Scudder. Plate IV, fig. ( .; Text -figure '2:>. 



1881. Archn'optihis iiiijcim, Scudder, Geol. Mag. [2], vol. viii, pp. 295, 300. 



1883. Ar<'Ji;>'<i 1 itiln.t /'//;/(//.-, Scudder, Mem. Bost. Soc. Nat. Hist., vol. iii, pp. 217, 22o, pi. xvii. 



tigs. 1012. 



1885. Arclin'fuitihix ni//r//x, llnm-mail. Bull. Soc. Amis Sci. Nat. Rouen [3], turn, xxl, p. (JO. 

 1S85. An-li;i-'i/ililiif ///i/i //s. SiMiddi'i-, Zittcl's llaudlnicli der Pahi'ontoloi,'ic', vol. ii, p. 757. 

 ls c .i;3. Ai-<-li;i'tijit!lii* iiiiji'ii*, Iii-on^uiart, Faune Kutmn. Temps Prim., p. 1-08. j>l. xxxvii, fig. 6. 

 .l/-i7/,-n////7//x Ingens, Handlirsrh, Die Fossilen Insekten, ]>. 117. pi. xii, fig. 18. 



'/'///"'. Basal fifth of wing, in counterpart ; British Museum (no. T. 3!97). 



llnrr.i'ii inn/ l,iicnli/i/. Middle I'pper Coal Measures; between Shelton and 

 Clay Lane, near Chesterfield, Derbyshire. 



N/)ir///Y Characters. Wings very large; cosia. subcosta, and radius broad 

 and robust. The costal border spiny. Interstitial iienration of stout li-ansverse 

 nervnres. 



I >i'xi-ri]ilimi. Onlv the basal part of the wing and its counterpart are 

 preserved, having a total length of !-'> mm., and a greatest breadth ol ']} mm. 

 Scudder's estimate of the length of the whole wing as o-V'i cm. is probably 

 excessive. 



Scudder (/i/c. o'/., 1SS1) thus deserilies the specimen: "All the principal veins 

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

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

 vein, lormiiiL;' the I'ronl (outer) border of the wing is studded with short oblique 

 spines (r macro! richia). The other veins lie al very different levels on the stone, 



