1905.] OF PHYTOPHAGOUS COLEOPTERA. 457 



Head entirely impunctate, broad, the eyes small and round ; 

 frontal elevations strongly raised, subquadrate ; labrum piceous ; 

 antennae long and slender, the lower four joints pale, the others 

 piceous, third and fourth joints elongate, equal, terminal joints 

 shorter, robust and thickened ; thorax about twice as broad 

 as long, the sides broadly flattened, posterior margin perfectly 

 straight, the surface impunctate, testaceous ; elytra finely and 

 closely punctured — of the spots, two are placed transversely at the 

 base, one on the shoulders, the other near the scutellum, two at 

 the middle, with the outer one lower than the other, and two of 

 exactly similar position near the apex ; breast and abdomen, as 

 well as the knees of all the legs and the tarsi, black ; claws 

 strongly swollen. 



Hah. Buenos Ayres. 



This is another of the small black-spotted species, of which 

 I received two specimens from Mr. 0. Bruch, of the La Plata 

 Museum ; the position and number of the spots and the coloui' of 

 the legs separate the species from 0. atropunctata and others. 



Oedionychis nigropunctata, sp. n. 



Black, the sides of the thorax broadly testaceous, the surface 

 impunctate ; elyti'a extremely minutely punctured, testaceous, 

 the sutural margins, three small spots at the base, a spot near the 

 suture at the middle, and another below the latter, of each 

 elytron black. 



Length 7 millim. 



Of posteriorly slightly widened shape ; the head with a few 

 punctures at the vertex, the latter black ; the space in front 

 of the eyes testaceous, these widely separated ; frontal ele- 

 vations indistinct ; clypeus triangularly pointed between the 

 antennae ; labrum obscure testaceous ; antennae extending just 

 below the base of the elytra, black, the third joint slightly shorter 

 than the fourth, this and the following joints robust and propor- 

 tionately short, subquadrately cylindrical ; thorax twice as broad 

 as long, the lateral margins strongly rounded, the anterior angles 

 produced forwards, the sides broadly sulcate, the disc impunctate, 

 black, in shape of a transverse irregular band, the sides broadly 

 testaceous ; scutellum black ; elytra extremely minutely and 

 closely punctured, testaceous, with three small black spots placed 

 on the basal margin (one at the shoulders and two at the middle) 

 and another larger subsutviral spot immediately before, as well as 

 a smaller one below, the middle of each elytron ; besides these 

 spots, the disc is stained with irregular fuscou& patches, which 

 are specially pronounced near the suture ; under side and legs 

 black. 



Hah. Bolivia. 



A rather peculiarly marked species, of which I know only a 

 single specimen. The elytral fuscous patches are probably due to 

 discoloration. 



31* 



