344 



ENTOMOLOGY 



a condition which is never found today, unless the patagia of Lepido 

 tera represent wings, which is unlikely. 



Stenodictya lobata (Fig. 306) described by Brongniart from th 

 Upper Carboniferous of Commentry, France, also bears prothora 

 "wings" and, in addition, eight pairs of abdominal wing-like or gill-like 

 appendages. No fewer than five families of Palaeozoic insects are 

 represented by specimens having prothoracic wings. 



From the rich deposits of Commentry, Brongniart has described 

 several forms of striking interest. Dictyoneura is a Carboniferous genus 



FIG. 307. Eugereon bockingi. Three quarters natural size. After DOHRN. 



with neuropteroid wings and an orthopteroid body, having, in commo 

 with several contemporary genera, strong isopteran affinities. Corydc 

 loides scudderi, a phasmid, has an alar expanse of twenty-eight inches 

 The Carboniferous prototypes of our Odonata were gigantic beside thei 

 modern descendants, one of them (Meganeura) having a spread of mor 

 than two feet; they were more generalized in structure than recen 

 Odonata, presenting a much simpler type of neuration and less differen 

 tiation of the segments of the thorax. The Carboniferous precursors o 

 our May flies attained a high development in number and variety; in 

 fact, the Ephemeridae, like the Blattidae, achieved their maximum 

 development ages ago, when they attained an importance strongly co 

 trasting with their present meager representation. 



The Permian has supplied a remarkable genus Eugereon (Fig. 30 



