MESOZOIC COCKROACHES. 459 



costal margin ; the tip is probably pretty fully rounded. The humeral field is well de- 

 veloped, well marked, fiat and strongly depressed, slenderly lanceolate, extending over 

 the basal two-fifths of the wing, the costal border delicately marginate. The medias- 

 tino-scapular vein has an entirely similar course to that of M. MurcMsoni, making the 

 costal area broadest in the middle of the wing, but there only two-fifths the width of 

 the wing; the nervules are simple, rather longitudinally oblique, parallel and numerous. 

 The base of the externomedian vein is obscured, but the branches, which are occasionally 

 forked in the apical half of the wing, are all straight, crowded and completely longitu- 

 dinal or trend slightly upward, occupying on the margin the greater, especially the 

 upper, part of the tip. The internomedian vein first forks before the middle of the basal 

 half of the wing, is very sinuous, the basal branches strongly bent near the outer angle 

 of the anal area and afterwards sweeping outward with a slight obliquity. The anal 

 furrow is not depressed, strongly arcuate, its tip slightly sinuous, reaching a little be- 

 yond the basal third of the wing. 



Length of fragment, 13.65 mm. ; probable length of wing, 16 mm. ; its breadth, 5.35 mm. 

 The specimen, the study of which I owe to Mr. Brodie, comes from the English Pur- 

 becks, locality not stated, and is named for the late Andrew Murray, Esq., who found 

 time amid other valuable studies to describe the only known fossil insects of British India. 



Mesoblattina Brodiei sp. nov. 



PL 47, fig. 7. 



The species is represented by an excellent specimen showing the upper surface of the 

 wing, a little dingier than the dirty chalky-white stone on which it lies; it is slightly con- 

 vex with the flat humeral field declivent, its inner border deeply impressed like the anal 

 furrow; all the veins are impressed and of the color of the wing, those of the externo- 

 median and internomedian areas much more faintly than the others. The wing is obo- 

 vate in general form, but is of somewhat irregular shape, in which it agrees in part at 

 least with M. Mantelli. The costal margin is strongly arcuate up to the tip of the hum- 

 eral field, and beyond that straight to the very broadly rounded apex of the wing. The 

 inner margin has two pretty strong and independent curves; one that of the anal area, 

 and the other that of the remainder of the wing, where, while the curve is uniform, the 

 effect is gained of being subparallel to the costal margin until half way to the tip, when 

 the wing tapers somewhat by the rounded excision of the lower outer angle. The 

 wing as a whole is about two and one-half times as long as broad. The humeral field 

 is lanceolate, its inner border bent in the middle, its pointed tip reaching two-fifths way 

 down the wing. The mediastino-scapular vein, parting from the humeral field at its an- 

 gle, runs subparallel to, but a little divergent from, the costal margin in a very broadly 

 arcuate curve to the tip, throwing oil' many parallel, oblique nervures, the basal ones of 

 which are simple and crowded, the apical more distant, more longitudinal and forked, 

 forming a costal area which occupies considerably more than two-fifths of the width of 

 the wing. The externomedian vein runs close and parallel'to the preceding, first forks 

 just before the tip of the humeral field, and has three or four generally simple, inferior, 

 sweeping, arcuate, longitudinal branches, followed by the even more arcuate, simple, api- 



