64 MEMOIRS ON THE COLEOPTERA 



of the elytra arcuate opposite the interval of interruption of the 

 marginal line of foveae. Palaearctic fauna *Osimus 



Head much shorter and somewhat constricted behind the eyes; body 

 narrower, more cylindric and smaller in size, the tarsi less stout; 

 marginal stria and labial palpi nearly similar. Palaearctic fauna. 



*Acinopus 



7 Pedestal of the mentum with a single long discal seta at each end. .8 



Pedestal of the mentum with two discal setae in transverse line at each 

 end 9 



8 Ligula not or but slightly dilated at tip; body very diversified in 

 habitus, smooth to distinctly punctate in various parts, in one or 

 both sexes, but never having the pronotum coarsely punctured 

 throughout as in the Dicheirus-like Ophonus; mentum dentate to 

 edentate; second labio-palpal joint a little longer than the third. 

 Cosmopolitan Harpalus 



Ligula strongly expanded at tip; upper surface strongly, closely and sub- 

 evenly punctured throughout; mentum feebly toothed as a rule, the 

 palpi nearly as in Harpalus, the body small in size. Palaearctic 

 regions *Ophonus 



9 Body smooth, with moderate head and completely edentate mentum, 

 the palpi, ligula and paraglossae as in Harpalus; prothorax cordiform 

 as in Cratognathus, the sides sinuately converging basally; antennae 

 unusually slender and barely at all compressed. South Africa. 



*Raphalus 



10 Elytra with a single subposterior dorsal puncture, always strongly 

 opalescent; ligula as long as the paraglossae or nearly so, rather wide, 

 distinctly expanded at tip, the paraglossae of peculiar form, narrowly 

 prolonged externally at apex; labial palpi slender, gradually acu- 

 minate at tip, the second and third joints equal in length; mentum 

 toothed. North America, excepting the Pacific regions. .Pteropalus 



The few exotic genera are introduced merely for comparison 

 with our own and can be disposed of in few words at this time. 



MICRACINOPUS n. gen. The type of this genus is a very small 

 species which I took at Wellington, near Cape Town; it may be 

 described briefly as follows: 



*Micracinopus politissimus n. sp. Narrowly oblong-suboval, convex, 

 polished, black above and beneath, the elytra with just visible bluish 

 lustre, the epipleura piceous; legs, palpi and antennae pale testaceous- 

 yellow; head but very little narrower than the prothorax, the eyes rather 

 large but only moderately convex, the mandibles stout and the frontal 

 impressions small and punctiform; prothorax transverse, three-fourths 

 wider than long, the sides broadly rounded, gradually slightly converging 

 and becoming not quite straight to the very broadly rounded basal angles, 

 the base transverse and margined throughout, not quite as wide as the 

 feebly sinuato-truncate apex; surface smooth, steeply sloping laterally to 

 the very fine re flexed margin, the foveae narrow, short and sublinear, deep 

 and obscurely punctate, the surface thence to the angles more feebly 



