400 SAMUEL H. SCUDDER ON THE 



numerous oblique simple 1)i-anchcs. The scapular reaches nearly to the tip of the wing, 

 running in a nearly straight course, most distant from tlie costal margin in the middle of 

 the wing; it begins to branch just beyond the basal third of the wing, and sends to the 

 costal margin half a dozen or less oblique branches, subparallel to the mediastinal branches, 

 but apically growing more longitudinal, any of which may, and the greater number do, 

 fork at less than halfway to the margin. The externomedian vein occupies the centre of 

 the wing, and with its branches feeds narrowly the apical margin, for it only forks three 

 times, usually simply, near the centre of the wing, beginning a trifle earlier than the 

 scapular vein, and the long branches are wholly longitudinal and closely crowded. The 

 internomcdian starts as if to terminate Avith a gentle ai'cuation before the middle of the 

 outer half of the wing, sending oft' half a dozen moderately distant, usually simple but 

 sometimes deeply forked, slightly sinuous, parallel, oblique branches ; but when it reaches 

 the middle of the wing, it throws off from its other side a couple of deeply forked or com- 

 pound, nearly straight, crowded, longitudinal branches, which extend the range of the 

 internomedian area almost to the very tip of the wing. The anal furrow is moderately 

 impressed, strongly arcuate or almost bent, and the anal veins sunple, moderately fre- 

 quent, also sti'ongly arcuate, and parallel. 



To this species I refer with little doubt (if it belongs to any of the species here de- 

 scribed) a prothoracic shield, independently ]M'eserved in the same shales. It is pretty 

 strongly domed, rounded siibtriangular, more than a third as broad again as long, strongly 

 rounded in front, centrally subtruncate behind; the surface is smooth and the margins 

 entire, but the disk shows a little behind the middle a very faint subtriangular depres- 

 sion, one-fourth the size of the pronotum, the apex posterior. 



Length of wing, 20 mm. ; breadth, 8.4 mm. ; length of pronotal shield, 7 mm. ; breadth, 

 9.75 mm. 



Four fragments of wings were found, with a single pronotiun, 'Nos. 21 and 65, 22, 

 29 and 69, 6(3, 67 and 68. The species is clearly difierent from anything before described, 

 but in the apical reach of the internomedian area and the means of securing it, it resem- 

 bles the later carboniferous Etoblattinae. 



Etoblattina sp. 



PI. 42, fig. 20. 



A second and smaller species of Etoblattina is indicated by the poorly preserved fore 

 wing and its reverse figured as above. Like the preceding, it is about two and a half 

 times longer than broad, with well arched costal margin, and the general course of the 

 veins shows that it is nearly allied to that species; the details of the neuration, however, 

 are very obscure. The mediastinal vein reaches the end of the middle third of the wing. 

 The scapular occupies about the same area as in the preceding species, and with very 

 similar, crowded, pretty longitudinal veins. The externomedian is more obscure. The 

 internomedian certainly difters in that the inferior branches are fewer, more longitudinal, 

 and far longer, but there is apparently, though this is uncertain, a somewhat similar api- 

 cal extension of this area, and apparently by a similar method. The anal furrow is ar- 



