418 MESOZOIC INSECTS OF QUEENSLAND, iii., 



England, together with a number of older forms, apparently relics 

 of the old Carboniferous Fauna, such as we know from Commentr}^ 

 in France. The three insects described in this Part illustrate 

 this intermingling of forms very clearly. 



Order ODONATA. 



Suborder Zygoptera. 



Family LESTID^. 



Subfamily TRIASSOLESTIN.E, n.subfam. 



Wings with the bases strongly reduced, petiolate; the whole 

 of the area between Cu and the posterior margin, below the 

 quadrilateral, free of veins; and, hence, no anal bridge present. 

 Quadrilateral narrow, placed very obliquely to the long axis of 

 the wing; its upper side short, its lower long, and hence its distal 

 angle very acute; Cuj and Cuo arising together from this angle, 

 Arculus complete, with Mj.^ arising from the top of the quadri- 

 lateral. 



Genus T r i a s s o l e s t e s, n.g. (Text-figs. 11,1 2/>). 



A complete antenodal cross-vein in line with the arculus; (this 

 is probably the second of the series). Distal side of quadrilateral 

 continued straight to the posterior border of the wing, by an 

 oblique cross-vein. M^.o arching slightly upward as each branch 

 is given off; M^ arises about six cells distad from the level of the 

 quadrilateral; Ms arises from Mj.o about four cells further distad 

 than Mg. Discoidal field fairly wide, with M^ and Cuj slightly 

 divergent; a single row of cells to beyond the level of the origin 

 of Ms, followed further distad by two rows. Between Cuj and 

 Cuo, a single row of cells at first, to about level of origin of Ms. 

 Cug curves strongly do\vnwards distally to meet the posterior 

 border of the wing; between it and the wing-border, one row of 

 cells basally, increasing to two distally. [Anterior and distal 

 portions of the wing missing, including nodus and pterostigma]. 



Genotype, Trlassolestps epiophJehw'kdps^ n.sp. (Upper Tri- 

 assic, Ipswich, Queensland). 



