1904.] AMERICAN PHYTOPHAGOUS COLEOPTERA. 403 



immediately before the middle, the second near the apex ; under- 

 side and legs black. 



Hah. Peru and Bolivia. 



A very distinct species, well distinguished by the narrow white 

 elytral bands connected at the sides. Seven specimens are con- 

 tained in my collection. 



ACANTHONYCHA PERUANA, Sp. n. 



Elongate and parallel, reddish fulvous, antennse and legs black, 

 posterior femora fulvous at the base ; thorax impunctate ; el}'tra 

 metallic green, finely punctured and wrinkled. 



Length 5 millim. 



Head impunctate, fulvous, shining, the frontal tubercles 

 strongly developed, rather broad ; antennse very slender, extending 

 beyond the middle of the elytra, fulvous, the second joint piceous, 

 third one-half shorter than the fourth joint ; thorax not broader 

 than long, the sides nearly straight and fonning a slight angle 

 before the middle, anterior angles slightly produced outwards, the 

 disc very obsoletely transversely sulcate near the base, reddish 

 fulvous, very shining and impunctate ; scutellum fulvous, broad ; 

 elytra wider at the base than the thorax, parallel, very narrowly 

 margined, metallic greenish, the surface very finely and closely 

 punctured and transversely wrinkled, the exti-eme lateral margins 

 and the epipleurse fulvous, the latter very broad anteriorly ; below 

 and the legs pale fulvous, the anterior tibiee rather darker. 



Hah. Peru. 



Accmthonycha was established by me in the Biolog. Centr.- 

 Amer. for a species placed by Baly in PeloniCi (P. elegantula), 

 from which it difiers very materially in the structure of the thorax 

 and other details ; the species described here difiers from that of 

 Baly by the sculpturing of the elj^ra, which are finely wrinkled 

 instead of smooth. 



ACANTHONYCHA GENICULATA, Sp. n. 



Reddish fulvous, the antennae and legs (the base of the posterior 

 femora excepted) black, thorax impunctate ; elytra dark blue, 

 finely rugose and punctured. 



Length 5 millim. 



This species agrees in most structural details with the preceding 

 one, of which it may possibly be a variety only ; but the antennae 

 are more robust, the joints less elongate and entirely black ; this 

 is also the case with the legs, excepting the basal greater portion 

 of the posterior femora which is fulvous, the colour of the elytra 

 also is dai-k blue instead of green. There are two exactly similar 

 specimens before me. 



Hab. Peru. 



ACANTHONYCHA DIMIDIATA, Sp. n. 



Fulvous ; the antennse, tibise and tarsi, the posterior legs and 

 the abdomen black ; thorax with a deep transverse sulcus ; elytra 



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