48 FOSSIL IXSKCTS OF THE BRITISH COAL MKAST IIKS. 



Genus PRUVOSTIA, novum. 



Generic < 'linrn/'t/'rx. Fore-wings two ;iml ;i li:ilt' times as long as wide; outer 

 and iniii'i 1 wing-margins almost parallel; \ving-apex well rounded. Sidicosta 

 widelv removed from the costal margin liasally. and apparently noi connected with 

 thecosta or radius. Radius straight with divergent radial sector. Radial sector, 

 median and cubitus all distally branched Anal veins few. Interstitial neuration 

 of straight cross-nervure>. 



Certain features of this wing- are suggestive of the Protorthoptera. These are 

 the wide basal, intercostal area, the basal origin of the radial sector, and the 

 remote branching of the radial sector, median and cubital veins. 



It is, however, more nearly allied to LitJiosialis than to Metri/in minlis, Ilandh, 

 for example, among the Protorthopteroids. The great length before division of 

 the main stems of the radial sector, median and cubitus, their strong divergence, 

 and the many branches of the median, form an assemblage of characters not 

 elsewhere known, and certainly deserving of generic recognition. 



It is with pleasure that I attach to this genus the name of l>r. 1'. I'ruvost, of 

 Lille University, in recognition of his valuable work on the fossil insects of the 

 north of France. 



Pruvostia spectabilis, sp. uov Plate 111. tig. 2; Text-figure 11. 



7'///'. A left fore-wing; British j\luseum (.lolmson Collection, no. I. K>,8 ( .>!). 



Jl/n'i::"ii nnil /,<<///'///. Aliddle Coal Measures (clav ironstone nodules in the 

 Hinds between the ''Brooch" and "'Pluck" coals); Coseley, near Dudley, 

 Staffordshire. 



KM. 11. Prueostiti .;/"V/,//,i/is, sp. nov. : diagram of neural inn "1 l<'t't !']< -winy, natural si/r Coal 

 Measures (clay ironstone nodules in tin- lands Ix-tween the " Jirom'li " and "'I'liii-K" coals); 

 Coseley, IKMT Dudley, Stall'm-dslim-. .l,,lni.-,i,ii ('oll.'i-ti.n, Brit. Mus. (no. I. 15,891). 



iii'r*. Outer margin convex at base, and inclining inwards to 

 the apex. Subcosta straight, not reaching the apex of wing. Radius straight, 

 irivinu' off radial sector near base; radial sector twice branched, median divergent, 

 three limes branched, the first two branches forking. Cubitus dividing basally 

 into two, the outer forking three times, the inner branch once. 



I ><:,'/ i>li<:/i. A left fore-wing -V_! mm. long and - I -111111. wide, almost covering 

 the surface of one half of the median plane of a reddish -brown ironstone nodule. A 

 little of the base of the wing is missing, while a |iarl of the wing-apex is concealed 



