(Page 243) 

 to Pselaphlds . Abdomen is broadest across the ,thira-f ourth free dorsal 

 joints, more or less narrowing anteriorly, its first three free dorsal 

 joints depressed at oase and the first tv.o v.ith a very fine carina-like 

 line; ventral side convex, the first three ventral joints impressed at 

 base; as a rule abdomen is curved strongly upward and forward in running 

 and at rest. The le^s are slender; fore- and middle-tarsi 4-jointed, hind 

 tarsi £-jointed, these first four joints short and of same length, togeth- 

 er scarcely longer than the claw-joint. Distinct sex-charaoters do not 

 occur. 



The species live in fungi and rotting plant-matter. Of the £ Kuropean 

 species, which are known, 3 from North and Middle Europe; 2 are heretofore 

 found in this country, the third is not improbable and is included in the 

 following. 



Key to Species. 



1. Body predominantly yellow-red, raetathorax and the next-last abdominal 



joints black. L. 2.5-3 mm 1. A. impressa Oliv. 



Body black 2. 



2. Fronotum indistinctly punctated, uith deep medial groove. L. 1.5-2 



mm 2. A. rivularis Iravh. 



Pronotum distinctly and rather densely punctated, v<ith a feeble, pos- 

 teriorly evanescent medial groove. L. 2.5 mm.: 3. A. puncticollis Sharp. 



, — - (Page 244) 



1. A. impressa Oliv. 

 (Oliv. 3ntom. Ill, 42; 3richs. Kaf. Mk. Br. I, 292; ien. Spec. Staph. 



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