68 FOSSIL INSECTS OF THE BRITISH COAL MEASURES. 



close similarity between them and Pteronepionites (' Revision der Palaozoischen 

 Insekten,' p. 76). 



"Pteronepionites" johnsoni, sp. nov. Plate IV, fig. 4; Text-figure 20. 



T//JII'. Immature wing, 12 mm. long and 4 mm. wide; British Museum 

 (.Madrley Collection, no. I. 2907). 



Horizon mill Locality. Middle Coal Measures (binds between the "Brooch" 

 and "Thick" coals); Coseley, Staffs. 



I ti'.-ifi'ijilliiii. The wing, like all these immature structures, is of extreme 

 temutv, and the finer details are masked by the coarse granular nature of the 

 matrix composing the nodule. The outer margin is straight, curving backwards 

 until it meets the inner margin in a bluntly-pointed apex. The inner margin is 

 strongly convex, a distal infolding indicating that the wing was apparently never 

 fullv extended. Very feeble traces occur of a short straight snbcosta, which 



Kn, 20. " I'ti'niiifjiiiinitft. " ./H/IHSMIII. sp. nov. ; iliu^i-iiin of win^-nrunitioi), t \v.,-;iinl-a-h:ilf times 

 natural si/.e . JliiMIc Coal Mi MM ires (l.imls Iir1 wn-n tlic " Hn.ocli " and " Thick " ro;tls) : Coseley, 

 StaftYirtlsliiiv. .Ma.lclcy GVllivtinii, Brit. Mus. (no. I. ^'.H;TI 



reached the margin near the apex of the wing. The radius is stout and straight 

 and reaches the wing-apex, giving off a well-marked radial sec-tor, which, diverging 

 from the radius, passes in a wide curve into the wing-apex. The median remains 

 undivided for nearly a third of its length, and then bifurcates into two eipial 

 branches which assume a parallel position, and reach the outer third of the inner 

 margin. The cubitus is represented by two veins, the first having a sigmoidal 

 sweep and the second a simple curve. Until reach the middle third of the inner 

 margin. No trace of anal veins can lie observed. 



"Pteronepionites" ambigua, sp. nov. I'late IV, fig. 5. 



/'///"' A pair of larval wings still attached to the crushed and a most 

 obliterated body; Uritish .Museum (Madeley Collection, no. I. 2'.Mi,S). 



Horizon <m<l Locality. Middle Cnal Measure's (binds between the "Brooch" 

 and "Thick " coals); Coseley, Staffs. 



Description. The insect lies in a fragment nf a liidit grey ironstone nodule, 

 and is not well preserved. One wing is whole, but mure than hall ol Ilie second 

 is niissiiiL!'. and it> ape.x is obscured by the matrix. The whole wing has a length 

 nl li'.i mm. and a width of 2 mm. Ivich is much thickened over the basal hall. 



