XVI 



THE GEOLOGICAL RECORD 



309 



is in the true Anisoptera. The most important point to notice 

 in this genus is the undoubted presence of the oblique vein and 

 elongated bridge of the Lestidae. Further, since this bridge-vein 

 is continued back to join M 3 instead of M^_ 2 , we must place the 

 genus in close relationship with the Synlestinae. Its relationship 

 to this latter subfamily seems to be closely similar to that which 

 Epiophlebia bears to the Lestinae. 



The only other Liassic genus, Protomyrmeleon, is an extra- 

 ordinary aberrant Zygopterid, with Sc reduced to a mere remnant. 

 It seems to have had no near allies, and certainly left no descendants. 

 Probably it was the last of some Protodonate side-branch. 



It is perhaps fitting to record here the recent discovery 

 of a beautiful Dragonfly wing from the Ipswich coal-measures 

 of Queensland (Trias-JuraV I have named it Mesophlebia anti- 

 nodalis (fig. 160), placing it in a new subfamily Mesophlebiinae, 

 probably belonging to the Anisoptera. Only the distal two-thirds 



A. 



B 



Fig. 160. Portion of hind-wing of Mesophlebia antinodalis Tillyard ( x 3-3), Trias- 

 Jura, Ipswich, Queensland. A. Tip of wing. B. Region of nodus. Original. 



of the wing is preserved, but it shews a beautiful pterostigma, 

 and a very distinct nodus of remarkable form. There is also 

 a great reduction in the length of the wing compared with its 

 breadth. The row of elongated post- trigonal cells, Ds, resembles 

 that of Epiophlebia. 



