33 



In a few species, males have the prosternum expanded 



laterally, obscuring the prosternal-pronotal epipleural 

 suture (Figs. 13-14). The extent of the expansion appears 

 consistent in all specimens of a species, but is variable 

 among species. It can be a small expansion (Fig. 13), or 

 it can nearly cover the entire pronotal epipleuron (Fig. 

 14) . 

 Mesosternum 



The mesosternum has few useful characters. The length 

 of the mesosternal lines in relation to the distance 

 between them, along with the meso-metasternal suture shape, 

 is useful in grouping related species. This suture can be 

 truncate (Fig. 15a), sinuate (Fig. 15f ) , or broadly sinuate 

 (Fig. 15c) . 

 Metasternum 



The metacoxal lines usually extend posteriorly away 

 from the medial side of the mesocoxa towards the hind angle 

 of the metasternum (Fig. 9, 15) . These lines are variable 

 in shape and length. 



Anteriorly, the metacoxal lines can stop near the 

 mesocoxa or continue along the meso-metasternal suture, 

 often meeting at the middle. The shape of the line between 

 the coxae varies from species to species and is useful in 

 grouping related species. The term "recurved" is used to 

 describe a line that curves away from the meso-metasternal 

 suture (Fig. 15c-f) . Medially, these lines can take 

 several forms: absent, not recurved nor meeting medially 



