107 



Antero-distal margin weakly extended anteriad. AXCu occupies the proximal one-seventh 

 of head; convex. FCu normal size; distinct; occupies the central three-sevenths of the head; 

 deltoid. FA moderately broad; occupies the distal three-sevenths 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 

 moderately broad and long 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. 175) 



Humeral Plate broad. Anterior margin convex; strongly sclerotized; very broadly adjacent 

 to, and almost fused with BScA. Apex clavate; broad; very weakly curved ventrad. Dorsal 

 margin concave. Proximal margin weakly convex; curved ventrad. Ventral margin sinuate. 

 Suture line between FPC+BPC and FC+BC absent. 



Anterior Subcostal Basivenale oriented distad; very broadly ovoid; moderately convex; 

 moderately curved anteriad. Proximal and distal sections separated by a prominent suture. 

 Proximal section strongly and extremely broadly extended anteriorly and postero- 

 proximally as a moderately broad convexity; larger than the distal section. Distal section 

 weakly discontinuous with the ScA bulge; separated by a very shallow concavity. Apex 

 broadly rounded; oriented distad. - Subcosta Anterior convex; extended posteriorly. Bulge 

 moderately broad. 



Radial Basivenale convex; moderately broadly open; discontinuous with radial stem; 

 angled antero-proximad; rectangular. Proximal arch slenderly deltoid; curved postero- 

 distad. Anterior section strikingly reduced by a greatly enlarged br; discontinuous with 

 the anterior margin of BR. Posterior margin weakly concave; surrounds the BMA arch 

 apex. Postero-distal margin truncate. Anterior margin depressed below the posterior 

 margin of ScA bulge; narrow; convex; angled antero-proximad. Embayment normal size. 

 Distal arch discontinuous with radial stem; moderately broad; convex; broadly curved 



