230 T. D. A. < '<>r/,; ,; 11 — J>, scriptions of Tertiary Insert*. 



on costa ; first discoidal cell of the same length as first sub- 

 marginal, viz. 2890 /u ; cubitus of hind wings originating 

 about 34 fi beyond transversomedial. The following meas- 

 urements are in /x : 



Greatest width of marginal cell 595 



First submarginal on marginal - 255 



Second " " " 714 



Third " " " 1020 



Marginal from end of third transverso-cubital to 



apex 680 



Basal nervnre on first submarginal 34-0 



" " " " discoidal 595 



" " from transversomedial (basad of it) 680 



Length of transversomedial 340 



Lower side of first submarginal 2346 



First transverso-cubital nervure . . 646 



Second submarginal on first discoidal 255 



" " "third " 612 



Third " " " " 561 



Lower side of third submarginal beyond third dis- 

 coidal 1105 



Fig. 4. — Embia florissantensU, x 2. 



According to Fox's- table the Pompilini (to which Agenia 

 belongs) should have the first discoidal cell definitely longer 

 than the first submarginal, but in some of the living forms the 

 difference is trifling. A. saxigena is from Florissant, Station 

 14 ( TF. P. Cockerell, 1907). 



* Proc. Phila. Acad., 1894, p. 295. 



