MESOZOIC COCKROACHES. 479 



Aporoblattina Eatoni sp. nov. 

 PI. 48, fig. 19. 



This specimen is a nearly complete wing of the same color as the light, dirty brown 

 stone on which it is preserved, with very dark brown veins ; it is perfectly flat, but the 

 veins are slightly impressed in places ; it has the appearance of being the upper surface 

 of a hind wing, partly folded in the partially incomplete anal region. The costal margin 

 is perfectly straight in the basal half, then more and more arcuate, meeting at a broad 

 angle the arcuate curve of the lower part of the wing at the scarcely angulate apex in 

 the middle of the upper half of the wing. The basal half of the costal area appears to 

 be narrowly folded. The mediastinal vein is straight, terminating in the middle of the 

 outer half of the wiug, with a few distant, longitudinally oblique, but short, simple 

 branches. The scapular vein is also straight, terminates just below the tip and is fur- 

 nished with three or four longitudinal, slightly upcurved branches, compound apically, and 

 originating at equal distances far apart, the second in the middle of the wing. The ex- 

 ternomedian vein is also straight, first divide's in the middle of the wing and is very 

 slightly and longitudinally branched. The internomedian vein, also straight, but slightly 

 declivous to beyond the middle of the wing, then bends slightly downward, and has four 

 slightly arcuate, longitudinally oblique, equidistant and rather distant simple branches. 

 The anal vein has branches similar to the preceding, but, apparently by a fold, they are 

 made to take a more longitudinal co\irse. 



Length of wing, 15 mm.; breadth, 6.5 mm. It comes from the English Purbecks, 

 was sent me by Rev. Mr. Brodie, and is named for Rev. A. E. Eaton who has contrib- 

 uted slightly to our knowledge of fossil insects. 



Aporoblattina anceps. 



[Without name] Westw., Quart. Journ. Geol. Soc. Lond., x, 396, Pi. 15, fig. 22. 

 Blattina anceps Gieb., Ins. Vorw., 317 (Giebel wrongly quotes fig. 21). 



This small species seems to be closely allied to A. Eatoni, but of a very different shape, 

 the costal margin being quite as arcuate as the lower margin, or more so, and the bluntly 

 rounded apex being in the middle of the wing. The characteristics of the neuration are 

 in general similar to those of A. Eatoni, but the externomedian vein (which is probably 

 wrongly represented as attached at base of fragment to the scapular vein) is only once 

 forked, near the tip, and the branching of the scapular vein is much simpler. 



Length of fragment, 7 mm.; probably the wing is not much longer; breadth, 4 mm. 

 Lower Purbecks, Durdlestone Bay. 



Aporoblattina McLachlani sp. nov. 



PI. 48, fig. 18. 



[Without name] Westw., Quart. Journ. Geol. Soc. Lond., x, 396, PI. 18, fig. 35. 



Westwood looked upon this wing as neuropterous, and apparently as more complete 



MEMOIRS BOSTON SOC. NAT. HIST., VOL. III. 



