64 THE ENTOMOLOGIST. 



the lower four joints shining ; thorax about one-half broader than 

 long, black, nearly impunctate ; scutellum very finely punctured, 

 black ; elytra broad and flattened, extremely closely and rather finely 

 punctured, yellowish white, the basal margin narrowly black, this 

 colour extending to the shoulders and to the extreme lateral margins, 

 the apical third portion in shape of a triangular patch and two small 

 spots placed obliquely at the middle of the disc of each likewise black ; 

 under side and legs of the latter colour, clothed with long yellowish 

 pubescence. 



Hab. Peru. 



This species is easily known by its system of coloration, and 

 the four black spots at the middle of the light-coloured portion 

 of the elytra. 



Mastostethus femoratus, sp. n. 



Dark fulvous ; the antennae, breast, and legs blackish ; head with 

 three, thorax with two, black spots ; elytra closely and finely punc- 

 tured, the posterior femora with a strong tooth. Length, 10 mill. 



Broad and flattened ; head sparingly punctured at the vertex, more 

 closely so near the eyes ; between the latter is a black spot, and two 

 others are placed at the base of the vertex ; posterior edge of the clypeus 

 raised in shape of a transverse ridge, testaceous as well as the palpi, 

 the rest of the head reddish fulvous ; antennae black, the basal joint 

 fulvous below ; thorax nearly twice as broad as long, very sparingly 

 and finely punctured, fulvous, the disc with two small black spots ; 

 scutellum finely punctured, fulvous ; elytra broad, not narrowed 

 posteriorly, the lateral margins below the shoulders strongly raised 

 and preceded by a longitudinal sulcus, the surface closely and finely 

 punctured ; thorax below fulvous, the flanks with a black spot ; the 

 anterior coxse likewise black ; breast deep black ; the mesosternum 

 strongly produced, compressed and truncate anteriorly ; legs nearly 

 black, the anterior femora and their tibite within, as well as the anterior 

 and intermediate tarsi, flavous ; posterior femora strongly thickened, 

 with an acute tooth ; abdomen fulvous. 



Hab. Bahia. 



From all other uniformly coloured species, in regard to the 

 upper side, the present one differs in the colour of the legs and 

 the strong femoral tooth ; a single specimen is contained in my 

 collection. 



Mastostethus erichsoni, sp. n. 



Fulvous ; the antennae, tibiae, and tarsi black ; head and thorax 

 spotted with black ; elytra finely punctured, with two transverse narrow 

 pale yellow bands. Length, 10 mill. 



Head very finely punctured near the eyes, reddish fulvous, the 

 vertex, a central longitudinal band, and a narrow stripe at the inner 

 margins of the eyes black ; clypeus and labrum with a transverse 

 black band ; antennae black, the lower four joints shining, the rest 

 opaque, strongly transverse ; thorax narrowed anteriorly, the sides 

 straight, the posterior angles strongly produced and pointed, the disc 

 very finely and sparingly punctured, reddish fulvous, a U-shaped mark 



