354 Handlirscli — New Paleozoic Insects from the 



apical half. Costa marginal and equally curved; subcosta 

 long, nearly straight and reaching almost to the tip. The 

 costal area comparatively broad, with numerous oblique, 

 ranious veins, bridged over by cross veins. Radius straight, 

 parallel to and very near the subcosta, its sector rising very 

 near the base, diverging but little from the radius and sending- 

 off only 2 short branches near the end. The media is likewise 

 somewhat reduced and cleft in the apical half into 2 branches. 

 The cubitus on the contrary shows an extraordinary develop- 

 ment occupying nearly half the wing and is cleft into 2 main 

 branches at about a quarter of the wing length. The anterior 

 of these branches splits by repeated forking into 6-7 twigs ; 

 the posterior sends forth partly forward, partly backward, a 

 number of forked twigs. The anal area, which occupies more 

 than a third of the hind margin, is limited by a strongly curved 

 vein and tilled by about 6 veins which are sometimes forked 

 and run in a regular vault toward the posterior margin. 

 Cross veins numerous. 



Prothoiax comparatively large and disciform; the head 

 broad and free, with strongly vaulted lateral eyes. One of the 

 legs, probably of the second pair, is preserved ; it is compara- 

 tively long and robust. If I am not mistaken, the posterior 

 legs are directed backward in the middle line of the fossil, 

 close together, a situation presupposing large and approxi- 

 mated coxae. I have no doubt about the close relationship of 

 this fossil to Eoblatta from Commentry, which has likewise a 

 reduced sector and media and an expanded cubitus. 



Holotype in Peabody Museum, Yale University, Cat. No. 43. 



Family ASYNCRITIDJE, new family. 



Comparatively clumsy with a short, stout body, covered and 

 exceeded in length by the singularly specialized wings, which 

 are strongly dilated in their apical half. The small disk-like 

 pronotum is pear-shaped. Meso- and metanotum fused to a 

 solid complex, each of them broader than long. Coxae very 

 large, femora and tibiae of the posterior legs very short. The 

 segments of the abdomen much broader than long. Anterior 

 wings with a broadly rounded apical margin, a marginal costa 

 and a long subcosta, fusing near the tip of the wing with the 

 costa. Sector rising at a quarter of the wing length, diverg- 

 ing widely from the radius and giving off but few branches, 

 directed forward, parallel to the radius. Media free, forked 

 only in the apical half. Cubitus free, with broken branches 

 forming a polygonal network. The smaller interstices with 

 straight cross veins, the broader ones, like the costal area, tilled 

 by a polygonal network. Anal area reaching nearly half the 

 length of the wing, containing a few veins regularly curved 



