326 PHYTOPHAGA. 



very feebly indicated ; scutellum black ; elytra scarcely visibly punctured, black, opaque, a small spot of 

 irregular dentate sbape below the base, a narrow transverse band at the middle and the apex flavous ; 

 first posterior tarsal joint nearly as long as the three following joints united. 



Hab. Panama, Volcan de Chiriqui (Champion). 



In several respects this species, of which but one specimen was obtained, differs from 

 others belonging to the genus ; the transverse groove between the eyes, the distinctly 

 raised carina, as well as the more square-shaped thorax, are not generally found in 

 Systena ; however, the closed coxal cavities, the long metatarsus of the posterior legs, 

 and the shape of the antennae show the place of the species to be in the present genus, 

 as other generic characters of importance are absent. 



9. Systena posticata. (Tab. xx. fig. 2.) 



Below testaceous ; antennae piceous, the four basal joints testaceous, stained above with piceous ; head and 

 thorax fulvous, the latter closely punctured ; elytra punctured like the thorax, fulvous, their posterior 

 half and a small spot near the scutellum (sometimes absent) black ; apices of the femora above, the tibiae 

 and tarsi, piceous. 



Length 2 lines. 



Hab. Mexico, Tuxtla (Salle). 



The coloration of this species, which is different from any of the varieties of S. vari- 

 abilis, induces me to look upon it as the representative of another form ; the antennae 

 have the four basal joints in both the specimens before me testaceous, the rest piceous; 

 the black posterior portion of the elytra extends to the sutural, but not quite to the 

 lateral margin, which remains of the ground-colour ; the testaceous femora have all a 

 black spot or streak on their upper surface near the apex and are finely pubescent. 



10. Systena championi. (Tab. XX. fig. 11.) 



Reddish fulvous ; antennae, tibiae, and a spot on the posterior femora black ; thorax and elytra closely and 



distinctly punctured, the former transverse. 

 Length 3 lines. 



Hab. Guatemala, Panzos, Teleman (Champion). 



In general shape this species has nothing to distinguish it from many of its allies. 

 I have separated it on account of the distinctly punctured thorax and the uniform 

 reddish fulvous colour of the upper surface. The antennae are almost entirely black, 

 with the exception of the underside of the basal joint ; the third and fourth joints are 

 of unequal length, the latter being a little longer than the preceding. The femora 

 have a distinct black spot near their apices. The anterior and intermediate tibiae are 

 entirely black, the posterior tibiae being fulvous at their base only. On account of 

 the punctured thorax and uniform colour this species cannot be mistaken for one of 

 the varieties of S. variabilis. 



