456 Mr C. J. Gahan on neto 



O'ides humeralisj sp. n. 



Rufo-ferraginea, antennis, palpis, pedibus, metasterno et medio 

 abdominis nigris : protiiorace quam longiori duj)lo latiori, sparsim 

 et minute pxinctulato ; elytris dense punctatis, hiimeris tuberculi- 

 formis, epipleuris concavis, pone medium evanescentibus, ab 

 margine externa haud distantibus. 



Long. 14 mm. 



Hab. West Africa, Cameroons. 



Ferruginous red; with the antennae, palpi, legs, meta- 

 sternum, and all but the sides and apex of the abdomen 

 black. Head with a lozenge-shaped depression between the 

 eyes and with a very fine median, longitudinal, impressed 

 line behind. Pronotum about twice as broad as its median 

 length, feebly and sparsely punctulate, its anterior margin 

 strongly concave, its posterior slightly convex ; its sides 

 somewhat rounded, gradually diverging from the base to 

 about the anterior third, thence converging ; its anterior 

 angles somewhat acute. Scutellum smooth, glossy, rounded 

 behind. Elytra thickly punctured^ with an oblique groove 

 or depression just above each shoulder, and giving to these 

 the ajjpearance of obtuse rounded humps or tubercles ; epi- 

 pleura concave, placed close to the margin of the elytra, very 

 slightly expanded just opposite the middle of the metathoracic 

 episterna, from thence gradually narrowed, and disappearing 

 beyond the middle. 



Antennae ( ^ ) rather longer than half the body, with the 

 third and following joints subequal. 



This species somewhat closely resembles 0. ferruginea^ 

 Fabr., and the preceding species, but is easily to be distin- 

 guished by the prominent shoulders of the elytra and by the 

 character of the elytral epipleura, as well as by minor differ- 

 ences in structure and colour. 



O'ides semipunctataj Duviv., var. 

 Ado7-iumpuncticollis,^si\.Y,'bl^, 

 A typis differt postpectore pedibusque totis nigris. 



Hob. Laos. 



In typical Noith-Indian specimens of 0. semipunctataj 

 Duviv., the legs are testaceous yellow, with only the tarsi 

 and the extremities of the tibia3 black ; the metasternum is 

 black, the sides of the hind breast testaceous yellow, slightly 

 infuscate. In the present variety the legs and the hind, 

 breast are entirely black. In other respects the variety 

 agrees with M. Duvivier's description of the typical form. 



