PLECOPTERA 



329 



there being usually no cross-veins beyond the basal anal cells (Fig. 

 3766); and they differ from the following families in that media of 



5fi Sc2 



'7l/l+2 



^d A^st ^ 



vl/j + 4 



Scx Sr, 



Ml+2 



Fig. 376f. — Wings of Nemoura sp. 



