SYSTENA. 



335 



30. Systena semivittata. (Tab. XX. fig. 9.) 



Pale testaceous ; head and thorax with a few fine punctures ; elytra impunctate, the suture and an indistinct 

 stripe near the margin pale fulvous. 



Length 2 lines. 



Head finely and distantly punctured, rather darker than the rest of the surface, obscure fulvous; antennae 

 longer than half the body, the fourth joint a little longer than the third, all the joints, especially the two 

 basal ones, stained with piceous above ; thorax broader than long, the lateral margins distinctly rounded 

 before the middle, and from there to the base straight ; basilar groove obsolete. 



Hah. Mexico, Guanajuato (coll. SalU). 



This seems to be a rather doubtful species, which may turn out to be a pale variety 

 of some other described form, or identical with S.pallidula, Boh. The two specimens 

 before me agree, however, in every particular, and I thought it best to describe them, 

 for the sake of completeness. The punctuation of the head and thorax can only be 

 seen with a strong lens ; the elytral sutural and submarginal stripes are very nearly 

 obsolete, especially the latter, and of a pale brown colour. 



31. Systena salvini. (Tab. XX. fig. 8.) 



Black ; base of the thorax and the four anterior legs testaceous ; the disk of the thorax very finely punctured ; 



elytra distinctly punctured, black, a narrow longitudinal discoidal stripe and the extreme apex fulvous. 

 Length 1| line. 



Hob. Guatemala, Quiche Mountains 7000 to 9000 feet (Champion). 



This little species, of which eight specimens are before me, is of a shining black 

 colour, with the exception of the first joint of the antenna?, which is more or less 

 testaceous at its base ; the thorax, like that of S. thoraciea, has the basal margin also 

 testaceous, but the surface, unlike that species, is here scarcely visibly punctate, and 

 even impunctate in some specimens ; the elytra are shallowly and obsoletely depressed 

 near the base, somewhat rugosely and strongly punctured, and have a very narrow dark 

 fulvous stripe, placed nearer the sutural than the lateral margin, and abbreviated before 

 the apex, the latter being itself narrowly testaceous ; in some instances the elytral stripe 

 is almost obliterated and only indicated at the base and apex ; the epipleurse are black ; 

 the posterior femora extend quite to the end of the elytra in the male insect ; the head 

 is impunctate and the frontal tubercles scarcely visible. As all the specimens before me 

 agree in the above particulars, I cannot but consider them to represent a distinct species. 



32. Systena palmeri. 



Below obscure testaceous, the breast black; head distinctly punctured, sides of the thorax fuscous; elytra 

 closely punctured, piceous, with a broad testaceous stripe near the suture, not curved at the base. 



Head with a few but very distinct punctures between the eyes, the vertex generally dark fulvous ; frontal 

 tubercles distinct ; third and fourth joints of the antennae equal in length, rather slender, the rest shorter, 

 fuscous, the joints nearest the head more or less testaceous at their base ; thorax one half broader than 

 long, the basilar sulcation obsolete, the surface with a few fine and stronger punctures near the base ; the 

 sides' fuscous or piceous ; elytra closely and slightly rugose-punctate. 



