1904. J AMERICAN PHYTOPHAGOUS COLEOPTBRA. 405 



closely punctured, the sides with a longitudinal costa, preceded by 

 a sulcus ( 5 ). 



Length 5^ milKm. 



Head deeply inserted, the frontal elevations strongly raised, 

 clypeus with an acute carina between the antennae, the latter 

 black, the basal three joints fulvous, the thii-d joint one-half 

 shorter than the fourth, the following joints slightly widened ; 

 thorax subquadrate, of the same shape as usual, fulvoiis, the base 

 with an obscure transverse depression, another one still less 

 distinct being placed near the anterior margin ; scutellum fulvous ; 

 elyti-a closely and finely punctvu^ed, with an acutely raised costa 

 fi'om the shoulders to below the middle and preceded by a 

 longitudinal sulcus ; posterior femora but slightly thickened, tibise 

 and tarsi black. 



Hah. Santa Oatarina, Brazil {Fruhstorfer). 



At once distinguished from the other species of the genus by 

 the costfe of the elytra in connection with the close punctuation, 

 their epipleurse are broad but the prosternum is very narrow. The 

 two specimens before me are probably females, and in the male 

 the elytral costa? may be absent. 



ACANTHONYCHA ANTEXN^ATA, Sp. n. 



Fulvous ; antennse robust, black, the basal three joints fulvous ; 

 thorax impunctate ; elytra dark blue, very finely and closely 

 punctured, their epipleui-te fulvous ; tarsi piceous. 



Length 4 millim. 



Of this species only a single male specimen is before me, which 

 may possibly be the male of A. costatipennis ; but the antennae 

 differ so much from those of that insect and of the other species 

 of the genus that I must look upon the species as distinct : 

 these organs*are proportionately short and stout, the third joint 

 is one-half shorter than the fourth and the latter and the following 

 joints are triangularly elongate, but not filiform ; the under side 

 is clothed with fine yellow pubescence, the legs are more robust 

 than usual and the tarsi rather widened. The species can only be 

 compared to those in which the elytral punctuation is distinct, but 

 the short antennse will distinguish it from any of them. 



JIab. Santa Oatarina, Brazil. 



SoPHRAENELLA, gen, nov. 



Ovate, convex ; antennae short, gradually transversely widened, 

 the basal joint club-shaped, the second very short, third joint 

 triangularly elongate, the following joints transversely sub- 

 quadrate, terminal joint short, ovate ; eyes reniform, deeply and 

 broadly emarginate ; palpi with the penultimate joint strongly 

 incrassate ; thorax nearly three times broader than long, the sides 

 narrowly margined, the anterior angles oblique, the surface 

 without sulcus ; scutellum broadly triangular ; elytra convex, 

 broadly ovate, their epipleurse moderately broad at the base, 



