1905.] OF PHYTOPHAGOUS COLEOPTERA. 427 



b. The basal spots absent ; each elytron with a narrow, oblique 



band from the middle of the base to the lateral margin 

 below the middle. 



c. The extreme basal margin, connected with a narrow sub- 



lateral longitudinal stripe, black. 



d. El}'tra with two basal small spots and another at the middle. 



In all these forms the antei-ior and posterior margins of the 

 thorax are more or less black, and frequently this colour occupies 

 the entire middle of the disc, leaving only the sides testaceous ; 

 the eyes are closely approached, and the head at the vertex is 

 generally finely punctured and wrinkled, but sometimes im- 

 punctate ; the metatarsus of the hind legs is scarcely typical of 

 OedionyGhis, being rather more elongate, but not to such an extent 

 as to include the species in Asphoera. The form with three black 

 spots can scarcely be distinguished from 0. humeixdis Fab., but in 

 that species all the specimens I have seen have a unicolorous 

 testaceous thorax, without any markings, and no black basal 

 elytral margin. All the specimens before me (16) come from the 

 Amazon regions. 



Elytra pale, loith spots and hands combined. 



Oedionychis parallina, sp. n. 



Head and breast black ; tliorax testaceous, impunctate ; elytra 

 extremely minutely punctured, flavous, two spots at the base, two 

 others below the middle, and a transverse band at the latter place 

 black ; legs testaceous, apex of the posterior femora black. 



Length 6-7 millim. 



Of posteriorly slightly widened shape, rather flattened ; the head 

 black, the vertex minutely granulate and punctured, frontal 

 elevations very broad, trigonate, eyes extremely large, carina 

 acute ; palpi flavous ; antennae rather I'obust, the basal four and the 

 apical three joints flavous, the rest black, third and foil owing- 

 joints neai-ly equal ; thorax more than twice as broad as long, the 

 sides gradually but broadly flattened, the posterior margin straight, 

 the anterior angles not produced, the disc impunctate, testaceous ; 

 scutellum black ; elytra extremely minutely and closely, almost 

 confluently punctured, testaceous, the shoulders with an elongate 

 black spot, another round spot near the scutellum ; a transverse 

 narrow band at the middle and two spots near the apex, placed 

 transversely, likewise black; breast black; abdomen and legs 

 testaceous, the posterior femora black at the apex. 



Hah. Brazil. 



Easily known by the pattern of the elytra and system of 

 coloration. The male insect is of considerably smaller size and 

 much narrower. 



Oedionychis colombiana, sp. n. 



Piceous, above testaceous, the apical joints of the antennae and 



