Mr. S. H. Scudder on Mesozoic Cockroaches. 57 



From the Lias of Dobbertin, Germany. The description 

 is drawn up from the data given by Geinitz. 



Pterinohlattina intermixta^ sp. nov. 



A nearly complete wing of this species has almost the same 

 shape as P. chrysea, but the upper part of the apex is more 

 produced. The mediastinal vein terminates before the middle 

 of the outer half of the wing, and the area narrows more 

 gradually than in any of the others ; its branches are gently 

 curved, and often forked, but not excessively crowded. Just 

 before reaching the tip of the mediastinal the scapular vein 

 suddenly bends towards the apex, running subparallel to, but 

 away from, the costal margin, terminating at the tip and 

 emitting a crowd of curved and forked branches. The closely 

 crowded externomedian branches part at an angle of 45^ 

 with the stem, are straight, and forked only just before the 

 tip, forming a tolerably regular belt of crowded veinlets along 

 the margin. The basal branches, however, are interfered with 

 and affected by the internomedian vein, which is nearly 

 straight, at first running plump against the externomedian 

 branches, curves then downward parallel to these, and termi- 

 nates a little before the mediastinal ; it is furnished abun- 

 dantly with branches curving like its extremity and branching 

 next the border like the externomedian branches ; but where 

 it abuts against these latter they simulate the appearance of 

 the internomedian branches so as to appear as if a part of the 

 internomedian area, and thus give the latter the appearance 

 of extending out beyond the broadest part of the wing. The 

 anal appears to be insignificant, reaching less than a third the 

 distance from the base, and resembling a narrower and smaller 

 internomedian area. Length of fragment 10'5 millim., pro- 

 bable length of wing 12 millim. 



Received from Rev. P. B. Brodie, as coming from the 

 Upper Lias of Alderton, Gloucestershire, England. 



Pterinohlattina liospes. 



Ricania hospes, Germ. Acta Acad. Leop. Carol, xix. pp. 220, 221, 

 pi. xxiii. fig. 18. 



Germar took this for one of the Fulgorina, in the neigh- 

 bourhood oi Ricania and Pmciloptera. It is pretty plain, how- 

 ever, that it belongs here, though the figure given by Germar 

 is not sufficiently clear to enable one to formulate any charac- 

 teristics. Assmann thought it a JSTeuropteron, falling in the 

 neighbourhood ol Drepanopteryx. 



It comes from the Oolite of Solenhofen, 



