108 Ml"- David Sharp on the 



■with the produced front part longitudinally impressed. 

 Thorax small, transverse, much narrower than the elytra, 

 about as broad as the head (with the eyes), with a central 

 basal fovea filled with pubescence. Elytra short, but 

 much longer than the thorax, each wdth well-marked 

 sutural and discoidal stride ; they are much broader at the 

 apex than at the base. Hind body rather elongate, 1st, 

 2nd and 3rd (visible) segments on the upper side, differing 

 but little in length from one another. Trochanters elon- 

 gate ; the middle ones abruptly dilated in their apical 

 portion and about two-thirds of the length of the short 

 and stout femora. 



A single specimen, of whose sex I am uncertain. 



Though I am unacquainted Avith the Centrotoma luci- 

 fuga of Heyden, it is evident to me, from the figure and 

 description of Duval (Gen. i., pi. 43, f. 213), that this 

 most remarkable Pselaphid is not, if not actually congeneric 

 with C. lucifuga, allied thereto. It differs from Duval's 

 figure, by its much shorter antennae, by its differently- 

 shaped thorax, and by the larger joints of its maxillary 

 palpi ; these however being apparently similar in structure 

 to C lucifuga. 



Nagasaki. 



Stipesa, no v. gen. 



Antennas 11 -jointed, short and stout, their extremity 

 remarkably stout ; nearly contiguous at their point of 

 insertion. Head forming over the insertion of antennae 

 a distinct tubercle, this having traces of a longitu- 

 dinal division. Eyes small. Maxillary palpi small and 

 slender (1st joint unobserved), 2nd very curved, slender at 

 base, gradually thickened fi-om the middle to the extremity; 

 3rd much shorter than the contiguous joints, continuous in 

 outline with 2nd, about as long as broad, furnished exter- 

 nally at its upper margin Avith a small hair-like process ; 

 4th stouter than 3rd, oval and pointed, furnished exter- 

 nally about the middle with a minute process. Hind body 

 Avith five visible dorsal segments, the 5th (or pygidiuni) 

 small and iuflexed, the tAvo basal segments AA^th a thick 

 but obscurely elevated margin. Anterior trochanters 

 short, middle ones elongate. Hind coxs extremelv dis- 

 tant. Tarsi rather long, 3-joiuted, 3rd joint longer than 

 2nd ; chiAvs small, but little curved, the outer shorter and 

 finer than the inner. 



A most remarkable insect, without close relationship to 

 any known to me : its systematic position appears very 



