408 MR. MARXIX JACOBY OX NEW SPECIES OF [DeC. lo, 



the third and fourth joints equal ; thorax twice as broad as long, 

 the sides subangularly I'ounded before the middle, constricted near 

 the base, the anterior angles blunt, the posterior ones acute, the 

 sui'face with a rather deep, transverse, sinuate sulcus near the 

 base, extending to the sides, the disc inipunctate ; eljiiiu wider at 

 the base than the thorax, transversely depressed below the lattei-, 

 veiy closely and distinct!}^ punctured, the punctures somewhat 

 regularly arranged in rows, the gi-ound-coloui' of a pale greenish- 

 testaceous, the base with two elongate black spots, one near the 

 margin, the other near the scutellum and extending nearly to the 

 middle of the elytra, another round black spot is placed near the 

 apex ; underside and legs colou;red like the upper sui'face. 



Hah. Marcapata, Peru. 



I possess five similarly marked specimens of this distinct species. 



Systena melanocephala, sp. n. 



Flavous, the head, the terminal joints of the antennae, and 

 the breast black ; thorax imj)unctate, flaA'ous ; elytra extremely 

 minutely punctured, flavous, the suture at the base, a humeral spot 

 and a transverse band near the apex black. 



Length 8 millim. 



Head impunctate, very shining, black, the frontal elevations 

 and the clypeus flavous ; antennae extending to the middle of the 

 elytra, flavous, the apical four joints black, third joint one-half 

 shorter than the fourth ; thorax one-half broader than long, the 

 sides nearl}^ straight, the anterior angles thickened, posterior ones 

 distinct, the surface very obsoletely sxilcate near the base, extremely 

 minutely punctured, flavous, shining ; scutellum black ; elytra 

 punctured like the thorax, flavous, a narrow sutural stripe at the 

 base and a subtriangular humeral spot as well as a transverse band 

 near the apex black, this band extends down the suture to the 

 apex, its posterior edge is consequently deeply concave ; under- 

 side and legs flavous, the breast and the tarsi black.' 



Hah. Marcapata, Peru. 



A single specimen is contained in my collection. This species 

 much resembles in its elytral markings certain forms of Diahrotica^ 



Systeka argentinensis, sp. n. 



Testaceous, sides of the thorax with a black stripe ; elytra 

 minutely punctured, the suture, a submarginal, medially widened 

 stripe, and a spot at the base and near the apex black. 



Length 5 millim. 



Head broad, pale fulvous, microscopically punctured, without 

 any tubercles or ridges ; clypeus pale flavous, deflexed ; antennae 

 not extending to the middle of the elytra, testaceous, the third 

 and fourth joints elongate and equal, terminal joints distinctly 

 shorter ; thorax subquadrate, about one-half broader than long, 

 with a very obsolete transverse depression near the base, impunc- 

 tate, the sides with a narrow longitudinal black stripe ; elytra 

 very finely punctured, testaceous, a sutural band, not extending- 



