CADDIS FLIES, IV — FLINT 



21 



Figures 27-36. — Polyplectropus macrostyla, new species: 27, genitalia, lateral; 28, clasper 

 and ninth sternum, ventral. Polycentropus costaricensis, new species: 29, genitalia, 

 lateral; 30, left cercus, dorsal; 31, aedeagus, lateral; 32, right clasper, posterior. P. 

 guatemalensis, new species: 33, genitalia, lateral. P. aztecus, new species: 34, genitalia, 

 lateral. Xiphocentron aureum, new species: 35, genitalia, lateral; 36, genitalia, dorsal. 



