67 



strongly curved ventrad beneath the postero-proximal margin of the ScA bulge. - Subcosta 

 Anterior weakly convex. Bulge narrow. 



Radial Basivenale extremely broad but very short; convex; narrowly open; discontinuous 

 with the radial stem; angled proximad; slenderly ovoid. Proximal arch strikingly broad; 

 with proximal and distal extensions; angled posteriad; broadly deltoid. Anterior section 

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

 Median section narrow. Posterior section extremely broad; moderately extended proximad 

 and very strongly extended distad. Posterior margin concave; surrounds the terminus of 

 the BMA proximal arch. Postero-distal margin rounded. Anterior margin elevated above 

 the posterior margin of the ScA bulge; extremely narrow; convex; angled proximad; 

 continuous with the distal arch. Embay ment extremely narrow. Distal arch present; convex; 

 broadly curved proximad; discontinuous with the radial stem; recurved, br strongly 

 sclerotized; large; occupies one-half of the proximal arch; discontinuous with BR; 

 posteriorly extended proximad. br projection distinct from BSc as a very short extension; 

 oriented antero-ventrad. 



Second Basal Plate (Fig. 106) 



MA-BMA Junction absent. - MP-BMP Junction: MP continuous with BMP on all margins. 

 - Crimp Patterns absent. - BMP-CuA Brace absent. - BMP-BCuA Brace present but 

 modified; broadly continuous with BMP; entire but only moderately strong; strongly 

 shifted distad; slender; equally broad along the entire length; convex; arises and extends 

 postero-distad from the MP-BMP junction. Terminus appears fused with the base of BCuA 

 but actually fuses with the distal margin of BCuA. Point of fusion continuous. 

 Medial Basivenalia very strongly reduced on all margins; extremely narrow and long; tube- 

 shaped. BMA very narrowly scaphoid; long; strongly convex along all margins; completely 

 fused to BMP. Anterior margin moderately concave. Proximal arch planate; straight but 

 strongly curved ventrad; long; moderately broad. Apex spatulate; curved antero-ventrad 

 beneath the BR proximal arch. Distal arch indistinct; continuous with the anterior margins 

 of both BMP and the BMP-BCuA brace. BMP junction with BMA continuous and 

 narrowly tubular; fused to the BMP-BCuA brace to form a narrow, looping tube; separated 

 from both IBP and BCu by membrane; anterior margin strongly convex; extremely narrow; 

 strongly elevated dorsad. Postero-distal section absent. 



Cubital Basivenalia moderately narrowly fused; small and ovoid. Postero-proximal margin 

 of BCuA fused with the antero-proximal margin of BCuP. Suture line present. BCuA small 

 and ovoid; convex; oriented antero-distad; strongly shifted anteriad to occupy the postero- 

 distal section of 2BP; moderately sclerotized. Distal margin anteriad of the antero-proximal 

 margin of CuA. BCuP moderately small; ovoid; long; convex; oriented postero-distad; 

 weakly sclerotized. Distal embayment narrow but deep. - Cubitus Anterior discontinuous 

 with BCuA. 



Basalare (Fig. 107) 



Head - HP lobe slender; continuous with neck. Apex narrowly rounded. Dorsal surface 

 strongly elevated from neck; not polished. BScP lobe broad; claviform; projects posteriad 



