28 



I use the term "prosternal plate" in reference to the 



surface of the prosternum between the coxal lines (Fig. 9) . 

 This "plate" is most often flat, but can be slightly 

 convex. The plate shape varies throughout the genus (Fig. 

 11) , from semicircular (wider than long) to elongate, 

 parallel-sided (longer than wide) . 



The length of the procoxal lines varies from species 

 to species. I use three phrases to describe the length of 

 these lines in relation to the procoxae : surpassing coxae, 

 barely surpassing coxae, not surpassing coxae. The phrase 

 "surpassing coxa" (Fig. lib) indicates the line passes 

 beyond an imaginary line drawn between the anterior edge of 

 the procoxae. The phrase "barely surpassing coxa" (Fig. 

 11a, lie) indicates the line passes beyond the point where 

 the line in front of coxa begins, but does not pass beyond 

 an imaginary line drawn between the anterior edge of the 

 procoxae. The phrase "not surpassing coxa" (Fig. lid) 

 indicates where the line stops where the line in front of 

 procoxae begins, well before the imaginary line. 



Many species have sexual dimorphism on the prosternum 

 in one or two forms. The majority of the species studied 

 have a differing number, or varying development, of foveate 

 punctures in front of the procoxa. In these species, 

 females have more numerous or distinct foveate punctures 

 than the males (Figs. 12-14), the opposite of Delkeskamp' s 

 (1959) observations of certain African Dacninae. 



