99 



deltoid. FA moderately narrow; occupies the distal one-fifth of head. Anterior margin 

 entire. Suture line between FCu and FA present. Suture line between FCu and AXCu 

 present. Suture line between FA and FJ absent. 



Neck elevated proximally and weakly so distally. FCu section of neck absent. AXCu forms 

 entire neck; extremely small. Proximal margin elevated as a very narrow and short ridge. 

 Ridge extends to median of the proximal margin of tail; very short. Dorsal surface of ridge 

 is weakly curved proximad; enlarged dorsally relative to AXA. Prong armed with a single 

 broad but short tooth; oriented postero-dorsad. Detached AXCu fragment saddle-shaped; 

 strongly curved ventrad both anteriorly and posteriorly; slender; moderately sclerotized. 



Tail reduced; deltoid; short. Dorsal surface oriented laterad. Proximal margin strongly 

 elevated dorsad to the dorsal plane of the neck; slopes distad along its entire length. 

 Anterior to antero-median section concave. Antero-median to posterior section convex; 

 oriented dorso-distad. Window absent. FJ+AXJ broad; extends close to the dorsal plane of 

 the neck; occupies the anterior half of the tail; moderately sclerotized; curved distad. 

 Suture line between FJ and AXJ absent. Suture line between FA+AXJ and AXA present. 

 AXA extremely short and narrow; more strongly sclerotized than FA+AXJ; occupies the 

 posterior half of the tail; curved postero-distad. Suture line between AXA and AXCu 

 present. 



Hind Wing Base Description 



First Basal Plate (Fig. 161) 



Humeral Plate moderately broad and long. Anterior margin weakly sinuate; strongly 

 sclerotized; adjacent to BScA. Apex very weakly deltoid; moderately narrow; curved 

 ventro-proximad. Dorsal margin sinuate. Proximal margin weakly concave; curved 

 ventrad. Ventral margin sinuate. Suture line between FPC+BPC and FC+BC absent. 



Anterior Subcostal Basivenale oriented distad; broadly ovoid; convex; moderately dorsad. 

 Proximal and distal sections separated by a prominent suture. Proximal section extended 

 anteriorly and postero-proximally as a moderately broad convexity; larger than the distal 

 section. Distal section discontinuous with the Sc A bulge; separated by a moderately deep 

 concavity. Apex broadly rounded; oriented distad. - Subcosta Anterior moderately convex; 

 moderately extended posteriorly. Bulge narrow. 



Radial Basivenale convex; open; discontinuous with radial stem; angled antero-proximad; 

 rectangular. Proximal arch slenderly deltoid; oriented posteriad. Anterior section strikingly 

 reduced by a greatly, enlarged br; discontinuous with the anterior margin of BR. Posterior 

 margin concave; surrounds the BMA arch apex. Postero-distal margin truncate. Anterior 

 margin depressed below the posterior margin of ScA bulge; extremely narrow; convex; 

 angled antero-proximad. Embayment normal size. Distal arch discontinuous with radial 

 stem; moderately broad; convex; broadly curved proximad; oriented postero-proximad. br 

 strongly sclerotized; occupies about one-third of the proximal arch; discontinuous with 

 BR. br projection very slender; concave; distinct from BScA. 



