TRIASSIC INSECTS OF COLORADO. 467 



BLATTAKIAE Latreille. 

 Neortheoblattina Scudder. 



Neortliroblattina Scudd., Proc. Nat. Sc. Philad., 1885, 103-109. 



In this genus the wings are about two and a half times longer than broad, with fairly 

 well rounded apices, the mediastinal and scapular veins amalgamated into a single vein, 

 which extends nearly to the tip and in the middle of the wing occnpies nearly one-half 

 its width. The internomedian vein is of varying importance, and in the large anal area 

 the veinlets terminate on the margin; the anal furrow is strongly arcuate, and deeply 

 impi'essed. 



All the species are small. N. lahesii may be taken as the type. 



TABLE OF THE SPECIES OF NEORTHUOBLATTINA. 



Fore wings not more than two and a half times as long as bi-oad ; raediastino-scapiihir vein terminating only a little hcCore 

 the tip ol' the wing. 

 Intenionieilian vein l)egi lining to forlj long before externomediaii and of eqiMl importance with it. 1. N. albolineata. 

 Internomedian vein beginning to fork scarcely or not liefore the externonu'dian and of less importance tliaii it. 

 luteinomedhm area terminating much farther from the apex of the wing than the mediastiuo-scapnlar. 



2. N. lakesii. 

 Internomedian area reaching out toward the apex of the wing nearly as far as the mediastino-scaiiular. 



3. N. rotundata. 

 Fore wings about three times as long as broad; niediastiao-scapular area terminating long before the tip of the wing. 



4. N. attenuata. 



1. Neorthroblattina albolineata. 



PI. 42, figs. 2, 18. 



JSfeorthrohlaUina albolineata Scudd., Proc. Acad. Xat. Sc. Philad., 1885, 109. 



The single wing has lost the tip, but all the essential features are preserved, excepting 

 the form of the tip. The wing is very dark colored, and the veins appear as very pale 

 lines upon it. The costal margin is gently and equably arched, Avhile the inner margin 

 is perfectly straight. The externomedian vein is little developed, first forking and then 

 not widely in the middle of the Aving, its fuller development being prevented by the am- 

 ple and unrestricted development of the internomedian vein, Avhich runs in a full rounded 

 course neai'ly to the tip of the wing. The anal area is interesting because the veins of 

 the upper half run close to, but do not impinge upon the anal furrow, curving down- 

 ward just before reaching it, and either running into the next vein below and terminat- 

 ing there, or continuing parallel to the furrow and tei'minating on the inner border. 



A single prothoracic shield has been found which I have referred here. It is broadly 

 transversely oval, considerably domed, highest in a vague, transverse, median ridge, the 

 anterior curve indistinctly bent in the middle (not so shown on the plate), the posterior 

 curve broad and in the middle somewhat flattened; the sides are well rounded and the 

 whole is about a fourth broader than long, all the margins entire. 



Length of fragment of Aving, 7 mm. ; probable length of Aving, 9 mm.; breadth, .3.5 mm.; 

 length of prothoracic shield, 3.5 mm.; breadth, 4.3 mm. 



Two sjiecimens, Kos. 32, 33. 



