31 



Figure 13. Prosternal sexual dimorphism in puncture 



development and lateral expansion. Male Ischyrus 

 incertus Lacordaire [Mexico, Chiapas] prosternum: a.) 

 ventral view, line = 0.75 mm; b.) lateral view, line = 

 0.50 mm; c.) ventral view of laterally expanded 

 prosternal-pronotal epipleural suture, line = 0.17 mm. 

 Female Ischyrus incertus Lacordaire [Panama] 

 prosternum; d.) lateral view, line = 0.50 mm; e.) 

 ventral view of prosternal-pronotal epipleural suture, 

 line = 0.25 mm. 



