1905.] OF PHYTOPHAGOUS COLEOPTERA. 455 



rather flattened, e^-enly, closely, and strongly punctured, the basal 

 mai-gin very narrowly and five spots on each elytron black : of 

 these, one of transverse shape is placed before the middle, two 

 obliquely below the middle, and two others near the apical margin ; 

 breast and abdomen black, the last segment and the legs testaceous, 

 the posterior femora with a black spot at the apex. 



Rab. Brazil. 



Allied to 0. nigromaculata Sturm, but difi"ering in the black 

 basal elytral mai'gin and the diflerent position of the spots, also 

 in the colour of the antennae. 



Oedionychis persimilis, sp. n. 



Elongate, testaceous ; thorax im punctate, the anterior angles 

 mucronate ; scutellum black ; elytra not perceptibly punctured, 

 with five black small spots on each (1.2.1.1). 



Length 6 millim. 



Head impunctate, the eyes rather widely separated, frontal 

 tubercles broadly subquadrate, carina short and rather blunt ; 

 antennae scarcely reaching to the middle of the elytra, testaceous, 

 the third and following joints nearly equal ; thorax more than 

 twice as bi^oad as long, the sides rounded, the anterior angles 

 slightly produced outwards into a small tooth, the lateral sulci 

 deep, the surface impunctate, obsoletely depressed in front of the 

 scutellum, the latter black ; elytra obscure testaceous, each with 

 five small black spots, of which one is placed on the shoulders, two 

 before the middle obliquely, the inner one near the suture, the 

 fourth spot below the middle near the lateral margin, and the fifth 

 below the sutural spot at some distance from the apex ; under side 

 and legs testaceous, the posterior femora with a black spot at the 

 upper edge. 



Hah. Ohilpancingo, Mexico. 



Of more elongate shape than 0. IS-maciclafa, and with five 

 spots on each elytron, the spots small and placed rather difierently. 

 Both specimens before me are of a very dull obscure testaceous 

 colour in regard to the elytra, but this may be due to discoloration. 

 0. atroguttataJa,c.,irom.the same locality, is a closely allied species, 

 but it difiers in the shape of the thorax, as well as in the position 

 of the elytral basal spots and their number. 



Oedionychis subdilatata, sp. n. 



Ovate, medially widened, black ; head and antennae piceous ;, 

 thorax pale testaceous or whitish, narrowed anteriorly, impunctate; 

 elytra broadly margined, impunctate, testaceous, an obscure trans- 

 verse band at the base, with two black spots and another below the 

 middle with another larger spot, obscure fulvous. 



Length 6-7 millim. 



Head impunctate, the vertex black or piceous, frontal elevations 

 narrowly transverse, eyes rather large ; antennae piceous or dark 

 fulvous, the third and fourth joints equal ; thorax with distinctly 

 rounded sides, gradually narrowed anteriorly, the angles rather 



Proc. Zool. Soc— 1905, Yol. II. No. XXXI. 31 



