XI V] CLASSIFICATION 277 



Subfamily 2. Lestinae (fig. 142, also PL II, fig. E). 



Wings very distinctly petioled. Nodus at about one-third of the wing- 

 length from base, or slightly more distad. Arculus half-way between base 

 and nodus. Sectors of arculus arising high up close to R. Bridge connected 

 as in EpiopMebiinae. M 2 arising from M 1 distad from subnodus. Antenodals 

 two only (rarely three), the second placed in line with the arculus. Quadri- 

 lateral of both wings narrow, with very acute distal angle. 



Fig. 142. Forewing (25 mm.) of Lestes dryas Kirby, <$, Britain. Original. 



Larva slender, with long legs (fig. 41 B). Mask with incised median 

 lobe ; lateral lobes irregularly cleft, with large movable hook bearing two or 

 three setae ; mental and lateral setae also present. Caudal gills with secondary 

 tracheae at right angles to gill-axis. 



Subfamily 3. Synlestinae (fig. 23 A). 



Wings very distinctly petioled. Nodus at about one-third of the wing- 

 length from base, or less. Arculus nearer to nodus than to base. Sectors 

 of arculus arising a little above half-way along the arculus. M z arising from M l 

 far distad from nodus. M 3 arising from M l _ 2 at, or a little proximad to, the 

 subnodus. Bridge connected proximally with M 3 close to its origin. Ante- 

 nodals two only (rarely three), the second placed in line with the arculus. 

 Quadrilateral of both wings very narrow, with sharply acute distal angle; 

 Cu! leaving it with a strong upward arch. General plan of venation resembles 

 that of the Megapodagrioninae by convergence. Antenna with very elongated 

 pedicel. 



Larva (Synlestes) very slender and elongated, with exceedingly long 

 spider-like legs (fig. 41 A). Mask with incised median lobe; lateral lobe 

 narrow, cleft into two sharp teeth, and with a denticulate inner border; 

 movable hook long and slender; no setae present. Antenna with greatly 

 elongated pedicel. Caudal gills with secondary tracheae somewhat oblique 

 to the gill-axis. Gizzard with dentition reduced to a few large teeth on each 

 field. 



Family 3. AGEIONIDAE. 



Wings distinctly petiolate. Nodus placed at from one-seventh to one-third 

 of the wing-length, rarely a little more distad from base. No bridge or oblique 

 vein. M 2 leaves M 1 far distad from nodus. Ms generally arising at subnodus, 

 M 3 a little before (some exceptions). Antenodals two only (exc. Neurolestes 

 and Thaumatoneura), the second placed either in line with the arculus or 



