14 Memoirs on the Coleoptera 



joint a third longer than the fourth; prothorax a fifth longer than wide, 

 widest near apical third but with the sides broadly rounded, gradually 

 converging but not distinctly sinuate basally, finely reflexed throughout; 

 base sinuate medially, much narrower than the apex, the angles right 

 but blunt; anterior impression obsolete, the posterior evident but 

 broadly concave, the fovese long, very feeble, having a few moderate 

 punctures; median stria fine but rather deep; elytra fully twice as long 

 as wide, almost evenly oval; sides moderately reflexed, very oblique 

 and feebly sinuate at apex, the sutural angles prolonged, not very 

 acutely angulate;. surface nearly flat, the strise very fine, shallow, faintly 

 subpunctulate; intervals perfectly flat; dorsal punctures small, four in 

 number, along the inner side of the third stria; scutellar stria long; 

 lateral foveoles subevenly spaced; first three of the hind tarsal joints 

 with a fine lateral stria. Length (9) 10.8 mm.; width 3.5 mm. Cali- 

 fornia (locality unrecorded). 



Related to gracilenta Csy., but with pale elytra, flat and not very 

 feebly convex intervals, more angulate apices and narrower and 

 rather more elongate prothorax; in gracilenta, which is represented 

 by a male, the antennae are thicker, with the third joint two-fifths 

 longer than the fourth, and the lateral foveoles of the elytra are 

 less evenly spaced and alternate in size in a way not noticeable in 

 tenuipes. The name gracilentus had been previously used by 

 Beutenmiiller for a species of Platynus, here referred to the genus 

 Platynidius; it is not necessary to change the name, however, as 

 the species pertain to two unquestionably distinct genera. 



Rhadine pertenuis n. sp. — Body very slender and feebly convex, very 

 shining and pale testaceous throughout, the elytra barely at all aluta- 

 ceous; head rhomboidal, elongate as usual, barely perceptibly narrower 

 than the prothorax, the neck two-thirds as wide as the latter; eyes 

 moderate, scarcely prominent; posterior superciliary puncture within 

 a small indentation; antennae a little over half as long as the body, the 

 third joint almost one-half longer than the fourth; prothorax slightly 

 elongate and evidently convex, widest anteriorly but with broadly and 

 evenly rounded sides, finely reflexed throughout and becoming distinctly 

 sinuate at base, the angles very sharp and feebly everted; base feebly 

 sinuate and very much narrower than the sinuate apex; anterior im- 

 pression evident only medially, the posterior obsolete; fovese small, 

 deep, smooth, traceable by a feeble impression to before the middle; 

 stria biabbreviated, fine but deeply and evenly impressed; elytra fully 

 twice as long as wide, four-fifths wider than the prothorax, somewhat 

 widest posteriorly, the sides very finely reflexed, gradually feebly arcuate 

 basally, obliquely subsinuate at apex, the sutural angles but very slightly 

 produced and broadly rounded; strise very fine and feeble, faintly sub- 

 punctulate, the intervals perfectly flat, the third with three minute 

 punctures adhering to the third stria; lateral foveoles rather unevenly 



