(Page 426) 

 3 punctures, of v.hich the foremost are placed closely to the fore- 

 margin, the middle one before the middle, and the hindmost behind the 

 middle. Elytral sutures are straight and contiguous, the sutural groo- 

 ve obliterated or insignificant; abdomen of uniform bieadth, or slight- 

 ly tapering posteriorly, the transversal ::rooves at base of its dorsal 

 joints feeble, straight and simple. Antesternal plate of presternum 

 is short, yet distinct, at itiddle finely carinated; middle-coxae not 

 broadly separated; the posterior and especially the raiddle-tibiae are 

 spiniferous, the anterior ones most often not; the first four fore- 

 tarsal Joints are more or less dilated, hind-tarsal first Joint longer 

 than the second, shorter than the clavv-Joint. 



In ;th8 northern fviiddle Europe 5-6 species are living, of which 3 

 are living in this country, under moss and leaves, and in company 

 with ants. 



Key to Species. 



1. Antennal third Joint considerably longer than the second. Elytra 



brownish-red. Large species. L. 11-14 r.m: 1. 0. punctulatus ioeze. 

 Antennal third Joint not, or only insignificantly longer than 



the second, uluch smaller species 2. 



2. Head distinctly narrower than pronotum; pronotum as a rule vivid- 



ly yellowish-red, rarely darker at middle. L. 5 mm 



2 . 0. melanocephalus Iravh. 



Head hardly, or not distinctly narrower than pronotum; pronotum 



pitch-brown with somewhat lighter sides. L. 5-6 mm 



3. 0. myrmecophilus Kiesw, 

 -167- 



