1905.] OF PHYTOPHAGOUS COLEOPTERA. 435 



slender and slightly longer than the fourth, the following joints 

 thickened ; thorax strongly transverse, the sides rounded, broadly 

 flattened, anterior angles mucronate. the sm-face with a few minute 

 punctures, testaceous, with three small black spots placed trans- 

 versely ; scutellum black ; elytra with strongly but narrowly 

 reflexed margins, rather strongly and very closely punctured, with 

 a very feeble depression below the base, black, each elytron with 

 six round flavous spots — of these, one is placed at the middle, just 

 below the basal margin, two at the middle, placed transversely, 

 two immediately below, and one at the apex ; under side and legs 

 black. 



Hah. Paraguay. 



A rather small and well-marked species, of which I possess a 

 single specimen only. 



Elytra with elongate spots or longiiudmal black or 

 flavous hands. 



Oedionychis humboldti, sp. n. 



Testaceous, the head and the breast black, sides of the thorax 

 straight, the latter impunctate ; elytra closely and finely punctured, 

 two elongate spots at the base and two below the middle of each 

 elytron black. 



Length 6 millim. 



Head black or nearly so, impunctate, the frontal elevations 

 broad, trigonate, clypeus perpendicularly deflexed ; antennae 

 robust, fulvous, the third joint smaller than the fourth ; thorax 

 narrowed in front, one-half broader than long, the sides straight, 

 broadly flattened, the anterior angles produced into a small tooth, 

 the surface impunctate, testaceous ; scutellum testaceous ; elytra 

 nearly parallel, closely and distinctly, although finely punctured, 

 testaceous, each elytron with two more or less elongate black spots 

 at the base and two others below the middle — of the basal spots, 

 one is placed on the shoulders and extends nearly down to the 

 middle, the other shorter one is placed near the suture ; the 

 posterior spots are almost joined, the outer one being of more 

 elongate shape than the inner ; under side and legs testaceous, 

 breast black. 



Hah. Bolivia. 



This Oedionychis is well distinguished by the straight lateral 

 margins of the thorax, which are obliquely narrowed anteriorly, 

 and by the four elytral spots. In one specimen the latter are 

 represented by short and narrow stripes. 



Oedionychis waterhousei (MS. Clark), sp. n. 



Black, the clypeus flavous ; head strongly punctured ; thorax 

 flavous, impunctate ; elytra finely and closely punctured, bluish 

 black, the lateral margins narrowly and a broad discoidal band, 

 joined at the apex to the margin, flavous. 



Length 6 millim. 



