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U.S. NATIONAL MUSEUM BULLETIN 261 



Figure 54. — ^yzzogeton haenschi Breddin (setae not shown in c): j, styles, 

 connective, and aedeagus, dorsal view; k, aedeagal apex, ventral view, 

 specimen from Balzapamba, Ecuador; m, forcwing; n, hindwing. 



of female at rest extending posteriorly farther than ovipositor. Hindwing 

 extending as far posteriorly as forewing; vein R2+3 entire. Hindlegs 

 with knees in rest position not attaining posterior proepimeral margins; 

 femoral setal formula 2:0:0; first tarsomere much shorter than combined 

 length of second and third. 



Male genitalia: Pygofer short, posterior margin trimcate, with 

 microsetae on and near ventral margin only. Plates fused basally, 

 extending posteriorly much beyond posterior pygofer margin, with 

 numerous fairly long microsetae. Style extending apically much beyond 

 apex of connective, without preapical lobe, rounded apically. Connec- 

 tive Y-shaped, not keeled. Aedeagus symmetrical, slender, elongate, 

 with two pairs of apical processes. Paraphyses absent. 



Female abdominal sternum VII quite broad, produced posteriorly 

 in a median triangular projection. 



Specimens have been studied only from Ecuador and Colombia. 

 There appears to be a considerable amount of variation in the apex 

 of the aedeagus. ^yzzogeton is related to Procandea, from which it may be 



