TRIASSIC INSECTS OF COLORADO. 469 



inc'diiistiiio-scapular vein termiiuites cous^iderably before the apex, and the oppositely ar- 

 cuate internoniedian reaches almost as far out, the branches of both nearly always simple. 

 The anal veins are only slightly irregular. 



Length of wing, 12 mm.; breadth, 4 mm. 



A single specimen with its reverse, Xos. 31 and 75. 



ScuTiNOBLATTi>rA Scnddcr. 



ScnUnoUattina Scudd., Proc. Acad. Kat. Sc. Philad., 1885, 110. 



In this genus, composed of small species, the front wings are decidedly more coriace- 

 ous than the hind wings, so that the nenration is often more or less obscured by it. The 

 wing itself is convex, as in the modern Phoraspis, and subtriangularin form, its greatest 

 Avidth being near the base, while the tip is bluntly pointed. The mediastinal and scapular 

 veins are again blended into one wliich, instead of having a sinuous course, is nearly or 

 quite straight and terminates below the apex of the wing, while the externomedian vein 

 follows closely parallel to it, and the oblique veins of this and the internomedian veins 

 follow each other so as to make it difficult to tell where the line of dejnarcation may lie. 

 The anal veins sometimes fall on the mai-gin and sometimes on the anal furrow. Scu- 

 tlnohlattlna hroagmarli may be regarded as the type of this group. 



TABLE OF TnE SPECIES OF SCUTINOBLATTINA. 

 Mediastino- scapular aud externomedian veins liavlng a distinctly sinuous course through tha middle of the wiug, both 

 terminating below the apex. 



A nal l)ranches falling on the hind margin 1. S. brongniarti. 



Anal branches falling on the anal fnrrow 2. S. intermedia. 



Mediastino-scapular and externomedian veins taking a straight course through the middle of the wing, both terminat- 

 ingatthetip 3. S. recta. 



1. Scutinoblattina brongniarti. 



PI. 42, tig. 5. 



Scutinoblattina hrongniarii Scudd., Proc. Acad. Nat. Sc. Philad., 1885, 110-111. 



In this interesting species the wings are very strongly convex at the base, and the 

 whole surface is flecked with dark spots. The branches part from the main veins at a 

 similar angle on either side of the middle of the wing. The anal area extends nearly to 

 the middle of the wing, where it is marked by a considerable emargination, and its veins 

 are frequent, oblique, mostly simple, and terminate on the margin. 



One of the specimens shows also a portion of the hind wings and most of the protho- 

 rax. The former were longer and considerably broader than the fore wings, but no es- 

 sential part of the neuration can be traced. The prothorax was ti-ansvei-sely ovate, a 

 little angulate at the sides, strongly domed, and either the head or an impi-ession of much 

 the shape and size of a head, about half the width of the prothoracic shield, can be seen 

 lying on the anterior half of the latter. 



Length of fore wing, 7 mm.; breadth, 3 mm.; length of prothoracic shield, 2 mm., 

 breadth, 3 nun. 



Two specimens, one with reverse, !N"os. 3S, 80 and 81. N"anied after Mr. Charles 

 Brongniart of Paris, well known for his remarkable discoveries among the older fossil 

 insects. 



