1905.] OF PHYTOPHAGOUS COLEOPTEPiA, 431 



Oediokychis centromaculata, sp. n. (Plate XV. fig. 2.) 



Testaceous or fulvous ; anteunte (the apical joints excepted) 

 black ; thorax impunctate ; elytra minutely punctured, a trans- 

 verse band at the base, another below the middle, obscure fulvous, 

 the intermediate space with four small black spots. 



Length '6-7 millim. 



Head impunctate, with a deep fovea between the eyes, the 

 latter large, closely approached ; antennse black, the lower three 

 or four and the apical two joints fulvous, third and fourth joints 

 equal, the following joints rather shorter ; thorax with rather 

 strongly rounded sides, the latter broadly flattened, anterior angles 

 mucronate, the disc impunctate, obscure fulvous ; elytra widened 

 at the middle, distinctly margined, extremely finely punctured at 

 the base, fulvous, this colour divided at the middle by a narrow 

 testaceous transverse band in which four black spots are placed 

 transversely ; under side and legs testaceous ; prosternum in the 

 male sti'ongiy convex anteriorly. 



Hah. St. Catharina, Brazil. 



Quite distinct in its system of colorationfromany other species. 

 Two specimens are before me. 



Oediois^ychis arcuatofasciata, sp. n. (Plate XY. fig. 7.) 



Ovate, subdepressed, greenish testaceous ; thoi-ax impunctate, 

 with rounded sides ; elytra scarcely perceptibly punctured, the 

 basal margin, a narrow semicircular band at the base, a spot at 

 the lateral and another near the sutural margins below the middle, 

 black. 



Length 5 millim. 



Head impunctate, eyes large, frontal tubercles subquadrate, 

 short, carina acute ; antennfe extending to the middle of the 

 elytra, testaceous, the third and fourth joints equal, terminal joint 

 rather more robust ; thoi-ax quite twice as broad as long, of equal 

 width, the sides moderately rounded, the lateral sulci deep, rather 

 narrow, the base with another obsolete transverse groove, the 

 surface impunctate ; scutellum black ; elytra widened towards the 

 middle, rather flattened, pale greenish testaceous, with a few 

 minute punctures (only visible under a strong lens), the extreme 

 basal margin as far as the shoulders and a transverse semicircular 

 narrow band below the base black ; this band extends upwards 

 along the suture to the scutellum, it is suddenly constricted at its 

 middle and does not extend to the lateral margins, near the latter 

 is another black spot, below the middle and a little lower a second 

 one is placed near the suture ; under side and legs testaceous. 



Hab. Chilpancingo, Mexico. 



I fonnerly looked upon this species as a variety of 0. 13-macu- 

 lata Jac, but a further careful examination has convinced me that 

 it really represents another form, as the colour of the antenna?, 

 shape and number of the elytral spots are different and exactly 

 similar in tlie two specimens before me; this species is also of a 

 less rounded and smaller shape. 



