454 SAMUEL H. SCUDDER ON 



timatelv about eight or nine branches which have a very graceful longitudinal course, 



scarcely arcuate downward and occupying the whole of the lower half of the wing 

 tip. The internomedian is first forked even earlier than the preceding, and its similarly 

 abundant and crowded branches have a very graceful and gentle, longitudinally sinuous 

 sweep, all falling on the margin in the apical two-fifths of the wing. The anal area is 

 ample, the furrow being very regularly arcuate, terminating near the end of the second 

 fifth of the wing, depressed, especially in the apical half; the anal nervules of a similar 

 abundance to those of the rest of the wing, mostly forked near their base, arcuate and 

 parallel to the furrows. 



The length of the wing is about 18.2.3 mm. its breadth 5.1 mm. It comes from the 

 Upper Lias of Dumbleton, Gloucestershire, England, where it was obtained by Rev. R. 

 L.Benson, who gave it to Rev. P. B. Brodie, to whom I am indebted for an opportunity 

 to study it. It is of a dull fuliginous color with here and there a reddish tinge on a blu- 

 ish gray stone. 



Mesoblattina Swintoni sp. nov. 

 PI. 40, fig. 10. 



A fragment of the most important parts of a wing shows so great a resemblance to 

 M. Bensoni that it can hardly be doubted that it belongs in this immediate vicinity, 

 while its differences will scarcely allow us to place it in the same species. The general 

 distribution of the branches of all but the anal veins (which are not preserved) is es- 

 sentially that of M. Bensoni, even to the relative origin of the earliest forks of the ex- 

 terno- and internomedian veins and their relation to the humeral field; but the course of 

 the mediastino-scapular vein (which is quite straight just where in M. Bensoni it is most 

 sinuous, and gives the costal area about two-fifths of the area of the wing), and the less 

 strongly arcuate and apically more straight anal furrow, which gives the area a greater 

 longitudinal extent while the straightness of the superior veins lessens its breadth, give 

 it at once a different aspect from J/. Bensoni and renders it most probably an entirely 

 distinct species. It is also probable that it is not so slender a species as the preceding, 

 being probably but little more than three times as long as broad. 



The fragment is 8 mm. long, and 5 mm. broad, but the probable length of the wing 

 was about 18 mm. and its probable breadth 5.5 mm. It comes from the English Pur- 

 becks and is in the collection of Rev. P. B. Brodie. The species is dedicated to Mr. A. 

 H. Swinton who has contributed somewhat to our knowledge of English fossil insects. 

 It occurs on a dirty chalky-white stone, and is faintly fuliginous in color. An upper 

 surface is shown and the wing is faintly arched transversely but is otherwise flat; the 

 veins are channelled, the anal furrow and internomedian less than the others, but the 

 anal furrow is not depressed below the level of the other veins. 



Mesoblattina Geikiei sp. nov. 



PI. 46, fig. 9. 



A nearly perfect wing, beautifully preserved, showing an upper surface. It is slender, 

 being slightly more than three times as long as broad. The humeral field is moderate 



