(Page 612) 

 broader than long, broadest a little before the middle, feebly, yet dis- 

 tinctly narrowing posteriorly, dorsum robustly and densely punctated, with 

 two deep, oblong longitudinal impressions at middle, and a feeble, short 

 one in the middle-line anteriorly, also with anteriorly narrowly, posteri- 

 orly broader and more distinctly set off side-margins, which are coarsely 

 and only simply punctated; elytra twice as long as pronotum, coarsely and 

 very densely punctated; abdomen extremely finely shagreened and indistinct- 

 ly punctated, rather dull, its side-margins broad, upturned. L. 2.5-2.5 mm. 



Distributed throughout the entire Europe, and everywhere, also here 

 common. 



0. litorale Kr. (Ins. D. II, 980) is one to caesum very closely allied 

 species, perhaps only a variety of same. Most often it is distinctly smal- 

 ler, L. 2.5 mm; the head especially is more, and all over glistening, with 

 dense, but not rugose punctation, elytra somewhat shorter, and with some- 

 what finer and denser punctation. It is found in a few places at the Bal- 

 tic coasts in North Germany and Skaane under seaweed, also in Sweden at 

 the coast of the Kattegat, and may likely also occur in this country. 

 8. 0. excavatum Steph. 



(Steph. 111. Brit. V, 355; ianglb. Kaf. M. II, 736. - fossulatum Erichs. 



Kaf. Mk. Br. I, 630; ^en. Spec. Staph. 877; Kraatz Ins. D. II, 979; Thorns. 



Skand. Col. Ill, 213; Rey Brevip. 1880, 218. - caesum Jyllh. Ins. Suec. II, 

 215). 



Of same size as caesum Jravh. , easily identified especially by the form 

 of pronotum and its very deep, ovate impressions. 



Black or brownish-black, glistening; pronotal side-margins and the el- 

 ytra, also the abdominal tip often brownish; antennae pitch-brown or reddish 



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