456 SAMUEL II. SCUDDER ON 



preceding group, to the latter species of which they bear many marks of resemblance, 

 but from which they also both differ much in the immense extent of the humeral field. 



A single wing with a fragmentary tip represents the upper surface of this species. 

 It is of a dull, pale yellow color on a dirty chalky-white stone. The surface is flat, the 

 veins depressed and slightly dusky. Restoring the fonn of the apex from the course of 

 the existing margins and veins, the wing appears to have been elongate elliptical in 

 shape, probably three times as long as broad, with uniformly and considerably arcuate 

 costal margin. The humeral field is depressed lancet-shaped and of unusual extent, 

 reaching certainly over one-half the wing and probably more. The mediastino-scapular 

 vein is pretty strongly sinuous, especially arcuate a little beyond the base and terminates 

 at the tip of the wing, the costal area occupying in the outer half of the wing fully half 

 its breadth; the branches are longitudinally oblique, straight, parallel and not crowded, 

 the basal ones simple, the outer forked and more longitudinal. The externomedian is 

 closely attached to the preceding vein in the basal third of the wing, beyond that arcu- 

 ate with superior, forked, longitudinal branches, the first fork opposite the end of the 

 anal furrow. The internomedian is pretty strongly sinuous and obliquely longitudinal 

 with three or four inferior, rather distant, arcuate branches, strongly arcuate and sublon- 

 gitudinal as they approach the margin, which they touch only in the outer half of the 

 Aving; it first forks opposite the divergence of the upper veins. The anal area is very 

 large, the furrow no more impressed than the other veins, strongly and pretty regularly 

 arcuate, terminating, by reason of a slight outward sweep at the tip, not far short of the 

 middle of the wing. The ultimate branches are more crowded on the apical than on the 

 costal or inner margins. 



Length of fragment, 11 mm., probable length of wing, 15.5 mm., breadth, 5.4 mm. 

 The specimen comes from the English Purbecks, locality not stated, and was submitted 

 to me by Rev. P. B. Brodie. The species is named for Rev. H. II. Higgins of Liver- 

 pool. 



Mesoblattina Murchisoni. 



PL 47, fig. 5. 



| Without name] Westw., Quart. Journ. Geol. Soc. Lond., x, PL 18, fig. 43. 

 jRithma Murchisoni Gicb., Ins. Vorw., 319. 



Blattidium Murchisoni Heer, Viertelj. naturf. Gesellsch. Zurich, ix, 290. 

 Mesoblattina Murchisoni Scudd., Proc. Acad. Nat. Sc. Philad., 1885, 114-115. 



Among the species with which I have been favored by Mr. Brodie is the type of "West- 

 wood's figure, and as this is defective in some particulars, I have drawn the specimen 

 again. It is in much the same state of preservation as the preceding and though nearly 

 related to it is nevertheless very distinct in the sweep of the inferior veins. It shows an 

 under surface, nearly flat, the humeral field being a very little higher than the rest, the 

 veins seated on slightly convex ridges. The specimen is of the same color as the dirty. 

 chalky-white stone. Apparently no part of the inner margin is present, but the course 

 of the inferior branches leads us to presume that it is straight, and the restoration of the 

 wing on this basis, with the regularly arcuate curve of the costal, leads us to presume it 



