62 



Radial Basivenale large; convex; broadly open; discontinuous with the radial stem; angled 

 antero-proximad; broadly rectangular. Proximal arch strikingly broad; angled postero- 

 proximad; deltoid; posteriorly weakly extended proximad and distad; continuous with the 

 anterior margin of BR. Postero-distal section rounded. Posterior margin concave; 

 surrounds the terminus of BMA proximal arch. Anterior margin elevated above the 

 posterior margin of ScA bulge; extremely narrow; convex; angled antero-proximad; 

 continuous with the distal arch. Embayment normal size. Distal arch very weak; 

 discontinuous with the radial stem; extremely narrow; recurved; oriented posteriad. br 

 strongly sclerotized; extremely large; deltoid; occupies over three-quarters of the proximal 

 arch; discontinuous with BR; posteriorly strongly extended proximad and posteriad as a 

 broad sclerite. br projection distinct from BSc as a slender, deltoid extension; oriented 

 antero-ventrad. 



Second Basal Plate (Fig.99) 



MA-BMA Junction absent. - MP-BMP Junction: MP only very weakly continuous with 

 the anterior margin of BMP; arises from below the distal plate. - Crimp Patterns absent. 

 - BMP-CuA Brace absent. - BMP-BCuA Brace partially reduced; weakly distinct; 

 moderately narrow; formed as a secondary tube-like convexity from the distal margin of 

 2BP; extends posteriad from 2BP antero-distal section; equally broad along the entire 

 length. Anterior section weakly reduced. Posterior section continuous with BCuA. 

 Terminus prominent; fused to the anterior section of BCuA, just mesad of the distal margin. 



Medial Basivenalia broad and moderately long; rectangular. Anterior and posterior margins 

 straight. Distal margin deeply concave; strongly elevated from the surrounding membrane. 

 BMA broadly scaphoid; very short but broad; completely fused to BMP. Proximal surface 

 weakly convex. Medial and distal surfaces flat. Anterior margin concave. Proximal arch 

 long; planate and falcate; very narrow; enlarged antero-proximally. Distal arch weakly 

 distinct; moderately broad; extremely short; strongly convex. BMP rectangular; convex; 

 separated from BMA by a shallow concavity; brace fused to BMP; separated from both 

 IBP and BCu by membrane. Proximal section narrow; deltoid; weakly separated from 

 BMA; convex. Antero-distal section long; narrow; rectangular; strongly convex; 

 discontinuous from the postero-distal section. Postero-distal section similar to the latter 

 but less convex. 



Cubital Basivenalia completely fused. Posterior margin of BCuA fused with the anterior 

 margin of BCuP. Suture line present. BCuA very narrow and long; convex; oriented distad; 

 strongly sclerotized. Anterior margin with a moderately broad, but shallow, concavity. 

 Distal margin strongly extended posteriad as a moderately strong, slender convexity. BCuP 

 very broad; ovoid; convex; oriented posteriad; moderately sclerotized. Distal embayment 

 absent. - Cubitus Anterior continuous with BCuA. Junction marked by a narrow concave 

 groove. 



Basalare (Fig. 100) 



Head - HP lobe moderately small; continuous with neck. Apex narrowly truncate. Dorsal 

 surface very strongly elevated from neck; not polished. BScP lobe claviform; stout; 



