12 



35. Platyderus nitidus, Kirh>/. Plate I. fig. 5. — Length of body 

 4 lines. Three speciaiens, all females, taken in lat. 54°. 



Body black, glossy; head triangular; mouth pieeous ; antennae rathei" 

 longer than the prothorax, pieeous with the terminating joints paler, scape 

 rufousi; prothorax subquadrangular, with the posterior angles rounded, eraar- 

 ginute at the base as well as at the apex, slightly ohunnellod, with a pair of 

 linear basilar impressions on each side, the external one bt ing oblique and 

 the other longitudinal ; elytra rather deeply furrowed, with two punctiforni 

 impressions in the usual situation ; viewed in the sun, the elytra exhibit 

 changeable shades of blue and bronze ; forebreast pieeous j legs clear, testa- 

 ceous. [Previously described as Feronia {Fterostichus) eri/throjnts, by 

 Dcjean.j 



[30] o6. Atigutor BTCOLOR. fiirh)/. — Length of body 3 lines. Taken 

 twice in lat. 51°. 



r^ody glossy, above black, beneath mahogany coloured ; antenna? and palpi 

 at the base dark mahogany colour* prothorax longer than wide, ratner nar- 

 rowest at the base, where it is slightly sinuated, anterior an^lcg rounded, 

 without punctures, dorsal channel slight, a deep short basilar furrow on each 

 side; elytra slightly furrowed with iuipunctured furrows, the seventh from 

 the suture obsolete ; in the interstice between the second and third are three 

 puuctiform impressions, the anterior one adjoining the latter and the two 

 posterior jnes the former. 



This species approaches very near to A. erythropus, Dejean, but it is 

 smaller, and the posierio) angles of the prothorax are not rounded. The 

 under side of thi.- body, the leg'^ and antenna?, are all of the same colour, 

 sometimes a little darker, at others a little paler. [The genus Argutor^ Meg. 

 is now included in Pterodkhns/\ 



37. Argutor [Pterosttchus] femoralis, Klrhy. — Length of the body 

 '3^ lines. Taken in lat. 54°. 



This species approaches very near to the preceding one, and its place is 

 between that and A vernahs, of which it is the American representative. 

 It differs from A. hknlor chiefly in having only the scape of the antennae 

 and the tibia' and tar.^i of a different colour from the rest of the body, and in 

 having the anterior half of the furrows of the elytra sli?zhtly punctured ; and 

 from the latter in having the prothorax narrower at the base, with only a 

 single iinpuGctured impression on e.tch side. [We have received a specimen 

 of this species, taken in the United States, from our friend Mr. F. G. 

 Sanborn, of Boston, Mass.] 



[31] 38. Aruutor [PterostichusJ manpibularis, Klrhy. — Length 

 of the budv 3^ lines. Taken in lat. 54°. 



