106 FOSSIL INSECTS OF THE BRITISH COAL MEASURES. 



A. liastata is closely allied to the French species, but the divisions of the main 

 veins are fewer and of a more simple nature. I see no reason to remove the 

 British species from the genus Archimi/lacris, and would refer the French example 

 also to the same genus. This view is now accepted by Pruvost (loc. cit., p. 158). 



Archimylacris woodward!, Bolton. Plate VII, fig. 2 ; Text-figure 34. 



1910. Archimylacris (Etoblattina) woodwardi, Bolton, Greol. Mag. [5], vol. vii, pp. 147 151, pi. xv, 

 figs. 1 1 a . 



Type. A left tegmen or fore- wing, 18 mm. long and 10 mm. wide; collection 

 of Mr. D. Davies, F.G.S. 



Horizon and Locality. Coal Measures (a ten-foot shale overlying the No. 2 

 Rhondda Seam, base of the Pennant Series) ; Clydach Vale, South Wales. 



Specific Characters. Wing short and broad. Apex well rounded and merging 



Fia. 34. Archimylacris woodwardi, Bolton ; diagram of wing- venation of left fore-wino- three times 

 natural size.-Base of Pennant Series (roof of ten-foot shale overlying the No. 2 Khondda Seam) ; 

 Clydach Vale, South Wales. David Davies Collection. 



into costal border. Anal area convex. Interstitial neuration of abundant stout 

 cross-nervures, occasionally uniting laterally. 



Description. -The tegmen, which is short, broad and strongly chitinous, lies 

 with the convex dorsal surface uppermost. The well-rounded outer margin of the 

 wing merges into the equally well-rounded apex. The inner margin is nearly 

 straight, a slight hollowing only of the middle portion being shown. Notwitli- 

 * standing its small size, the details of the wing are very clear, the veins and the 

 interstitial neuration being well shown. The basal portions of the main veins are 

 elevated above the surface, the rest of their length and also their divisions being 

 sunk below the general level. 



The subcostal vein is weak, and sunk along its whole course. It is widely 

 separated from the costal margin, following a parallel course to beyond the middle 

 of the wing, where it bends outward and joins the margin. The subcosta gives 

 off a numerous series of forked and simple divisions to the costal margin. 



The radius arises close to the subcosta and median, diverging from the former 

 in the middle of its length, and approaching it again by the first of the four outer 



