1905.] OF PHYTOPHAGOUS COLEOPTERA. 453 



Head impunctatej frontal elevations broad, well marked, cainna 

 very convex and prominent, eyes very large ; thorax twice as 

 broad a,s long, the sides broadly flattened, the lateral margins 

 rather rounded near the base, gradually narrowed anteriorly, 

 anterior angles produced into a small tooth, the surface impunctate, 

 with a transverse depression at the sides near the base, testaceous, 

 the sides with a trilobate black spot, the middle lobe pointed 

 upwards ; elytra nearly parallel, with a feeble depression beloAv the 

 base, impunctate, a round black spot on the shoulders, another 

 near the scutellum, and a third spot of transverse shape at the 

 middle, as well as the sutural margins from below the base to the 

 apex, black ; under side and legs testaceous. 



Hah. Peru. 



I know only a single specimen of this species and am not aware 

 therefore if the markings of the elytra are subject to variation, 

 which is probably the case. The species has the frontal carina, 

 however, much more strongly raised than most of its allies, the 

 elytral spots are comparatively large and deep black ; this and 

 the similarly coloured suture will assist in the recognition of the 

 species. 



Oebionychis basixotata, sp. n. (Plate XV. fig. 4.) 



Piceous, the base of the head and a transverse band at the 

 thorax bluish-black ; elytra strongly and closely punctured, with 

 four black spots, placed obliquely- at the base in a semicrescent. 



Length 6 millim. 



Head strongly punctured near the eyes, fulvous, the vertex 

 bluish-black, frontal elevations robust, oblique, carina short and 

 broad ; eyes large, each as broad as the dividing space ; antennae 

 scarcely extending to the middle of the elytra, black, the lower 

 three joints more or less flavous below, third joint thinner but as 

 long as the fourth ; thorax twice as broad as long, the lateral 

 margins straight at the base, rounded anteriorly, the anterior 

 angles produced into a strong tooth, the sides deeply sulcate and 

 flattened, surface with a few minute punctures, the entire disc 

 bluish -black, the margins fulvous ; scutellum black ; elytra not 

 depressed below the base and scarcely so within the shoulders, 

 closely and strongly punctured, each with two bluish-black spots 

 at the base placed transversely, the outer one transverse, the 

 inner of more elongate shape ; below and the legs nearly black ; 

 metasternum raised anteriorly. 



Hah. Paraguay. 



This beetle differs in the markings of the elytra from any other 

 described species. 



Oedionychis maculatissima, sp. n. 



Ovate, convex, dark fiilvous below, vertex of head piceous ; 

 antennae and thorax fulvous, the latter with two transverse, black 

 spots ; elytra rather strongly punctured, pale fulvous, Avith ten 

 spots each (3.3.2.2). 



