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DESCRIPTIONS OF SOME NEW SPECIES OF PHYTO- 

 PHAGOUS COLEOPTERA FROM THE ISLAND OF 

 MAURITIUS. 



By Maktin Jacoby. 



In the 'Transactions' of the Entomological Society of London 

 for 1898 I have already described several species from the above 

 locality, which were obtained by Mons. Alluaud, of Paris. I 

 have now received some other species from the same gentleman, 

 which, although closely allied, seem again different, and of which 

 I give the descriptions here. 



CCENOBIUS SULCICOLLIS, Sp. n. 



Black, the labrum flavous ; thorax impunctate, deeply obliquely 

 sulcate at the sides ; elytra moderately deeply punctate-striate, black, 

 shining, with a transverse flavous spot at the middle of the disc. 

 Length, 3 J mill. 



Head black, nearly impunctate, the clypeus broad, with a few 

 punctures ; eyes extremely large, occupying the entire sides of the 

 head and nearly joined at the vertex, deeply notched ; antenna sub- 

 filiform, the lower four joints fulvous, the rest black, basal joint elon- 

 gate, second one short, third and fourth joints equal, the others 

 slightly thickened and shorter ; thorax transverse, narrowed anteriorly, 

 if viewed from above, the sides greatly deflexed, the lateral margins 

 rounded, anterior margin accompanied by a deep groove, the surface 

 entirely impunctate and shining, black, the sides with a deep oblique 

 groove at the middle, extending nearly to the middle of the disc, the 

 basal margin slightly produced at the middle and truncate at that 

 place ; scutellum subquadrate ; elytra short and parallel, rather deeply 

 punctate-striate, the punctures very fine near the apex, the interstices 

 flat and impunctate, those near the lateral margins convex, shoulders 

 rounded and prominent, the surface black and shining, with a small 

 transverse flavous spot at the middle of the disc ; below and the legs 

 black ; prosternum broader than long, the base concave. 



The structural characters in regard to the antennae and the 

 thorax scarcely fit in any of the different genera of Crypto- 

 cephalidae, but the large and nearly joined eyes and the broad 

 prosternum are characters peculiar to Cosnobius ; the deep 

 thoracic groove in connection with the coloration will at once 

 distinguish the species. 



Rhypaeida bimaculicollis, sp. n. 



Obscure testaceous or fulvous ; antennse (t>he basal joints excepted) 

 black ; thorax impunctate, with two black spots ; elytra strongly 

 punctate-striate, the interstices minutely wrinkled, the sides broadly 

 and the suture very narrowly black. Length, 5 mill. 



Of oblong parallel shape ; the head impunctate, opaque, obscure 

 fulvous, with a deep central groove at the vertex ; clypeus separated 

 by another very deep transverse groove, its anterior margin concave, 

 the surface finely and sparingly punctured ; labrum fulvous ; antennae 



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