Platynin^ 7 



antenna are very long and filiform, but the third joint is only 

 slightly longer than the fourth — not so decidedly so as in Rhadine. 

 The sides of the pronotum are widely and strongly reflexed, the 

 edge slightly sinuate just before the rounded basal angles, the 

 posterior setigerous puncture a little within the edge and well 

 before the base. The basal foveas are large, deeply concave, elon- 

 gate, adjacent to the sides and smooth. The head is elongate- 

 rhomboidal, the palpi long, the elytra much wider than the pro- 

 thorax, elongate-suboval and but feebly convex, always shining 

 and with more or less coarse deep stria? and convex intervals. The 

 legs are notably long. The met-episterna are only moderately 

 elongate and less so than might be presupposed from the very 

 elongate hind body. The species are moderately numerous and 

 those at hand may easily be separated as follows : 



Alternate intervals of the elytra each with two series of many rather 

 irregular punctures, which adhere to the bounding striae; legs pale 

 rufous 2 



Alternate intervals each with a single series of punctures, more sub- 

 axially situated, very widely spaced, a little closer basally as a rule; 

 legs black or piceous 3 



Alternate intervals impunctate as well as the others, the regular dorsal 

 punctures, three or four in number, being confined to the^third in- 

 terval as usual in the subfamily; legs dark 4 



2 — Upper surface piceous-black throughout; under surface piceo-rufous; 

 head three-fourths as wide as the prothorax, with prominent eyes, 

 the front with two nubilous reddish spots; mandibles, labrum and 

 the long slender palpi pale rufous; antennae ferruginous, fully 

 three-fifths as long as the body; prothorax as long as wide, widest 

 near anterior third; base transverse, as wide as the sinuate apex; 

 apical angles obtusely prominent; surface perfectly smooth and 

 impunctate, the transverse impressions distinct, linear, the posterior 

 cuspidate on the median line, which is finely impressed; elytra 

 shorter, not more than one-half longer than wide, four-fifths wider 

 than the prothorax; subapical sinus not very oblique and just 

 perceptible in curvature; scutellar stria short, parallel; side margins 

 strongly reflexed. Male with the first three anterior tarsal joints 

 parallel and straight at the sides, oblong and equal in width; basal 

 joints of the posteripr tarsi finely striate along the sides; last 

 abdominal segment very broadly rounded at tip, with a single 

 puncture at each side; in the female the tarsi are simple, the last 

 ventral still more obtusely and broadly rounded, with two or three 

 setigerous punctures at each side. Length (cf 9) i3-5-i5-0 rnm.; 

 width 4.8-5.3 mm. Indiana. [Platynus erythropus Dej.j. 



hypolithus Say 

 Upper surface evenly deeper black and rather more shining; general 



