(Page 74) 

 distal joint tapering; pronotum narrower than elytra, a little broader 

 than long with anteriorly rather strongly rounded, posteriorly almost 

 straigth sides and obtuse -angular hind corners, convex, v;ith rather fine 

 and not dens^, or deep punctation v;ith a transversal fovea posteriorly 

 before the scutellum, and a feeble longitudinal groove in middle-line; 

 elytra longer than pronotum, rather finely and densely punctated, the 

 surface very finely transversally aciculated and less glistening than 

 pronotum, their posterior margin inside the outer corners distinctly J.ir«- 

 curve4i abdomen tapering posteriorly, sparsely and finely punctated, strong- 

 ly glistening or polished. L. 4-5 mm. 



Distributed and rather common in this country, often numerous at forest 

 brooks and at brims of lakes under stones, leaves and in alluvium, also 

 on the strand under seaweed. 



(Page 75) 

 3. 0. rivularis Mill. 



(Miller Verh. d. zool.-bot. Ver. "'ien I, 110; Kraatz Ins. D. II, 52; 

 »anglb. Kaf. M. II, 94. - latipennis Sharp Ent. Monthl. Mag. VI, 1370, 280). 



Very closely allied to plcata , most often a little larger and broader 

 also darker of color; pronotum les; -^li cteninj. 



Pitch-black; elytra and abdominal tip brown; antennae reddish-brown; 

 their base, mouth-parts, and legs yellowish-red. 



Head and pronotum much raoro densely punctated than In plcata . and due 

 thereto pronotum is less glistening than in same; antennae most often a 

 trifle more elongated, elytra broader, somewhat more finely and densely 

 punctated, rather densely haired. L. 4-5.5 mm. 



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