Mr. A. Murray on Coleoptera from Old Calabar. 103 



recorded from Old Calabar) confined to the west coast of 

 Africa, but is also found on the east coast. I know of three 

 specimens in different collections — mj own from Old Calabar, 

 one from Natal, in the collection of Mr. Janson, from which 

 Dr. Candfeze's description was taken, and one from Algoa Bay, 

 in the collection of Mr. Wilson Saunders, nearly twice the size 

 of (but still the same as) the other two. 



ExLcnemidae. 



OiSOCERUS*, nov. gen., De Bonvoul. 



This remarkable genus has not yet been published ; and I 

 had intended that its first appearance should be in M. de Bon- 

 vouloir's work on the Eucnemidge, on which he has been for 

 some time engaged. As, however, I have now reached the 

 place in my list where it comes in, I have asked my friend 

 M. de Bonvouloir to favour me with an advance copy of his 

 description, which he has kindly done ; so that I am able to 

 give the reader that eminent entomologist's own description 

 of this giant of his group, in anticipation of that in the work 

 itself : — 



^^ Grenus Oisocerus. 



" Head strongly convex, tolerably deeply sunk in the pro- 

 thorax ; epistome continuing directly the curve of the fore- 

 head, forming a very obtuse angle with the latter, and con- 

 sequently distinctly bent in as regards the head, slightly nar- 

 rowed at its base, with its anterior margin arched in front. 

 Mandibles only showing exteriorly a surface transversely 

 arched and narrow, very much crossed, with a long and sharp 

 point. Antennae distinctly shorter than the half of the body, more 

 or less strongly flabellate. Pronotum short, strongly attenuated 

 in front ; marginal ridges and prosternal sutures converging 

 in front. Propectus not canaliculated below along the external 

 ridge, showing laterally a single marginal line obliquely con- 

 verging in front, starting from the posterior angles and reach- 

 ing the anterior angles, deflexed, without another supplemen- 

 tary line. Propleura tolerably broad, subtriangular. Pro- 

 sternal sutures rectilinear. Presternum without mentonnifere, 

 with its anterior margin raised in a keel very slightly sinuated 

 in the middle. Metathoracic episterna subparallel ; epimera 

 invisible. Posterior haunches furnished with an upper trans- 

 verse blade tolerably narrowed on the outer side, and raised 

 above the abdominal surface so as to leave a free passage for 

 the thighs to rest in. Legs rather narrow, scarcely thickened 



* From olaos, a willow, and Kepas, a horn, in allusion to its flabellate 

 antennae. 



