Hi' FOSSIL INSECTS OF THE BRITISH COAL MEASURES. 



across just beyond the point of division of the two main branches. The outer 

 branch remains undivided until near the margin, where it forks twice, ending on 

 the inner side of the wing-apex in three divisions. The inner branch forks into 

 two equal twigs, the outer breaking up twice by equal forking into four divisions, 

 while the inner twig forks once. Most of the divisions of the inner branch of the 

 median end on the distal portion of the inner wing-margin. 



Two incomplete branches of the eubitus are present, but the character of the 

 vein cannot be determined. No traces of the anal veins are shown. 



The principal veins and their main branches arc well spaced, and follow the 

 same general direction without being truly parallel. The interstitial neuration 

 consists of fine straight cross-nervures. 



Ajjinilii'K. The general character of the veins other than the subcosta is seen 

 in several Palseodictyopteroid genera such as Eubleptus, but in none that I know 

 are these characters accompanied by a similar type of subcosta. In the oblique, 

 forked divisions of the latter, and the manner in which thev are given off, as well 

 as in the course of the subcosta itself, the wing most resembles that of the Proto- 

 blattoids, and to this group I would assign it. 



INCERTJi SEDIS. 



Genus PLESIOIDISCHIA, Handlirsch. 

 1906. Plesioidischia, Hainllirsch, Die Fussilon Inscktrn, ]>. 346. 



Plesioidischia sp. Plate VI, rig. 3; Text-figure l^'.i. 



Ti/}>t'.A fragment of a right wing, Id mm. long and Id mm. wide; 

 Manchester Museum (no. L. 400.")). 



llri::ini nut] Lnca/ifi/. Middle Coal Measures (binds between "Brooch" and 

 " Thick " coals) ; Tipton, Staffs. ' 



Km. L'IP. rii'fiiniliscluii sji; diii^i-iiiii "I' vc'iml ii'ii "f wiutf-fragment, tlirrc- lialvrs nalm'al ize, Mi. Mir 

 ('...il MI-.ISMIV.- ; Tipton, Staffordshire. Manchester MM emu (no, I. I'.NP.'O. 



Description. The wing-fragment lies on the irregular surface of a small 

 i roust i me nodule, the outer costal margin and costal area on one hall ol 

 the nodule, and the middle portion of the wing on the oilier. The liase 



