SYSTENA. 333 



shoulder a short but distinct costa extends to beyond the middle of each elytron ; legs testaceous, the 

 apices of the posterior femora stained with piceous. 



Hab. Mexico, Toxpam, Cordova (coll. Salle). 



It will not be difficult to recognize this species on account of the rugosely-punctured 

 upper surface and the elytral costa; the black band at the lateral margin widens, in 

 some specimens, at the middle ; but is not united with the sutural band at the apex, 

 the latter remaining of the testaceous ground-colour ; the testaceous colour at the apex 

 is double the width of the black portion. 



26. Systena siibrugosa. 



Black or piceous below ; base of the femora testaceous ; upper part of head black ; thorax rugosely punctured, 

 piceous, margined with testaceous ; elytra subrugose-punctate, black, a sublateral stripe testaceous. 



Length lf-2 lines. 



Head very finely punctured and transversely wrinkled between the eyes, when seen under a strong lens ; 

 vertex black, lower part of face testaceous; frontal tubercles rather strongly raised; labrum piceous; 

 antennee rather more than half the length of the body, robust, obscure piceous, the three basal joints and 

 the base of the following testaceous, fourth joint slightly longer than the third ; thorax subquadrate, sides 

 distinctly narrowed near the base, the surface rugose-punctate, the basilar groove indistinct ; scutellum 

 black; elytra finely rugose near the base, the punctuation indistinct towards the apex, black, each elytron 

 with a narrow yellow straight sublateral band from the base to the apex. 



Hab. Mexico, Guanajuato (coll. Salle). 



The subrugose piceous thorax margined with testaceous and the narrow yellow 

 elytral stripe are good distinctive characters of the present species, which is further 

 characterized by the black and nearly smooth vertex of the head. The female is larger 

 than the male, the antenna? are shorter, and the elytral yellow stripe is a little broader ; 

 the elytral epipleurse in both sexes are black. Four specimens are contained in 

 M. Salle's collection. 



27. Systena thoracica. (Tab. XX. fig. 4.) 



Obscure blackish asneous ; anterior legs testaceous ; head and thorax strongly punctured, base of the latter 

 testaceous ; elytra strongly and closely punctured, each elytron with a narrow testaceous longitudinal 

 band, abbreviated near the apex. 



Var. The elytral band indicated at the base only. 



Length 2 lines. ■ 



Head closely and strongly punctured ; frontal tubercles distinct, the space m front of them testaceous ; 

 antenna* blackish seneous, the basal joints more or less testaceous inwardly, the fourth joint a little longer 

 than the third; thorax not more than one half broader than long, slightly narrowed at the base, the 

 basilar groove obsolete, the space behind the latter testaceous, surface strongly and rather closely punc- 

 tured • elytra a little less strongly punctured than the thorax, more finely towards the apex than at the 

 base, with a nearly straight testaceous band, placed nearer the sutural than the lateral margins, and 

 extending from the base to within a little distance of the apex. 

 Hab. Mexico, Puebla {coll. Salle); Guatemala, Dueiias, Zapote, San Geronimo 

 (Champion). 



The strongly punctured head and thorax, as well as elytra, and the colour of the 



