188/.] PHYTOPHAGOUS COLEOPTERA OF CEYLON. 91 



punctured ; elytra regularly punctate-striate, the interstices scarcely 

 raised. 



Length ^ line. 



Rather smaller and narrower than the preceding species ; the 

 thorax twice as broad as long, the sides slightly narrowed towards 

 the base, nearly straight, the surface extremely closely and dis- 

 tinctly punctured, the basal groove distinct and placed close to the 

 posterior margin ; elytra rather paler than the thorax, the punctures 

 larger and arranged in regular rows ; all the femora thickened, the 

 posterior ones scarcely more incrassate than the others. 



Sebaethe suTURALis, sp. nov. 



Testaceous, terminal joints of the antennse fuscous ; head and 

 thorax impuuctate ; elytra very finely and closely punctured, a more 

 or less distinct sntural stripe, narrowed behind, piceous. 



Length 11-2 lines. 



Head not longer than broad, impunctate ; the frontal tubercles 

 strongly raised, transverse and nearly contiguous ; carina short but 

 distinct. Antennae closely approached, two thirds the length of the 

 body, the first three joints pale testaceous, the rest fuscous, the third 

 joint one half longer than the second, but slightly shorter than 

 the fourth joint. Thorax narrow, three times as broad as long, the 

 sides slightly rounded and narrowly margined, the anterior angles 

 thickened, the surface somewhat convex and entirely impunctate. 

 Scutellum rather broad, impunctate. Elytra slightly widened towards 

 the middle, their apices rounded, the sides witii a narrow margiu ; 

 the disk very finely and moderately closely punctured, obscure 

 testaceous like the rest of the body, with a narrow posteriorly con- 

 stricted sutural piceous stripe not extending to the apices ; the 

 posterior tibiae longitudinally channelled ; the first joint of the pos- 

 terior tarsi as long as the two following joints together. 



Dikoya. 



Smaller than S. pallida, Jac, the sides of the thorax less strongly 

 rounded, and the surface without depressions ; further distinguished 

 by the sutural stripe ; this latter is, however, in some specimens 

 scarcely visible, in others strongly marked. The colour of the 

 antennae and that of the tarsi is also subject to variation, being 

 sometimes obscure piceous and in some instances testaceous ; the 

 impunctate thorax, the coloration of the elytra, in connection with 

 the size, will help to separate S. suturalis from its allies. 



Sebaethe ceylonensis, sp, nov. 



Oblong-ovate, obscure testaceous ; thorax impunctate, the sides 

 strongly rounded ; elytra extremely closely and finely punctured. 



Length 2^-3 lines. 



Head impunctate ; the eyes very large, divided by a space not 

 broader than their diameter ; the frontal tubercles broadly trigonate, 

 bounded behind by a deep groove. Antennae two thirds the length 

 of the body, the joints slender and elongate, with the exception of 

 the second, of nearly equal length. Thorax nearly three times as 



