376 Handlir&ch — New Paleozoic Insects from the 



and somewhat more highly specialized member of the Megase- 

 coptera, but it is possible that in the future we will be forced 

 to consider it as the type of a peculiar order. 



Prochoeoptera, new genus. 



Prochoroptera calopteryx, new species. Figs. 61-63. 



The body is comparatively robust, but always slender. Head 

 apparently small. The second of the three thoracic segments 

 somewhat larger than the two others and distinctly limited. 

 Prothorax about semicircular, mesothorax tun-like. The base 

 of the abdomen as broad as the thorax, the first segment being 

 twice as broad as long, the following segments becoming 

 gradually shorter and, beginning with the sixth, also narrower. 



Fig. 61. 



Fig. 61. Prochoroptera calopteryx. x 3. 



The eighth segment comparatively small, the ninth elongated 

 and provided beneath with a slit-like sexual organ, limited 

 laterally by longitudinal ridges. Cerci not preserved. 



The two homonomous wing pairs laid obliquely backward 

 and apparently not to be folded over the abdomen. The 

 anterior margin nearly straight, the posterior strongly curved. 



