S. H. SCUDDER ON PALAEOZOIC COCKROACHES. 133 



externomedian vein should have beeii represented as united at the base with the scapular vein ; the outside 

 mark indicating the end of the scapular area is placed slightly too high; that indicating the end of the anal 

 area is placed on the wrong side of the anal furrow. 



Fig. 2. Gerablattina fascigera (Scudd.), p. 113. Magn. \ ; drawn by J. H. Blake. 



Fig. 3. Etoblattina Lesquereuxi Scudd., p. 67. Magn. } ; drawn by J. H. Emerton. See note to next 

 figure. 



Fig. 4. Etoblattina Lesquereuxi Scudd., p. 07. Magn. ] ; drawn by J. H. Emerton. One or two basal 

 branches of the mediastinal vein are not shown. The origin of the middle externomedian branch is wrongly 

 represented; see a corrected figure of the latter in the text, p. 68. 



Fig. 5. Etoblattina weissigensis (Germ.), p. 65. Copied from the Neues Jahrbuch fur Mineralogie, 1873, 

 pi. 3, fig. 1; reversed. Camera lucida sketch by S. H. Scudder. This is a European species. 



Fig. 6. Archimylacris parallelum Scudd., p. 85. Magn. $ ; drawn by J. H. Emerton. The mediastinal 

 vein of the front wing should be represented as gradually approaching the costal margin in the basal half of 

 the wing. The mediastinal vein of the hind wing can be seen on the specimen, underlying the front wing, 

 but is not represented on the plate. The wing is accompanied by the pronotum. 



Fig. 7. Petrablattina sepulta (Scudd.). p. 125. Magn. ] ; drawn by S. H. Scudder. The inner margin of 

 the fragment is represented as more convex than it should be; the short line representing the main medias- 

 tinal line in the middle of the fragment should be nearly parallel to the margin, not oblique. 



Fig. 8. Archimylacris acadicum Scudd., p. 84. Magn. 'j ; drawn by S. II. Scudder. The middle interno- 

 median branches are given too sinuous a curve. 



Fig. 9. Gerablattina balteata Scudd., p. 110. Magn. f; drawn by J. II. Blake. The terminal part of 

 the internomedian vein, as described in the text, is not shown here; the outside mark indicating the outer 

 termination of the internomedian area should be considerably nearer the tip of the wing. 



Fig. 10. Gerablattina balteata Scudd., p. 112. Magn. 'J; drawn by L. Trouvelot. Represents the anal 

 area only. 



Fig. 11. Fragment of the wing of a cockroach from Sydney, Cape Breton ; p. 128. 



Fig. 12. Etoblattina venusta (Lesq.), p. 70. Magn. ^ ; drawn by J. II. Blake. The restored outline of 

 the base of the wing very probably represents too much as lost. 



Fig. 13. Fragment of the central portion of the wing of a cockroach from Cannelton, Penn. ; p. 128. 



Fig. 14. Archimylacris acadicum Scudd., p. 84. Magn. {; drawn by S. II. Scudder. 



