(Page 85) 

 outer corners strongly incuni-ed; Hbdomen rather elongated and equally broad, 

 its first four free dorsal Joints depressed at base, the fourth sometimes 

 less distinctly depressed than the first three, the fifth free joint much 



(Page 86) 

 longer than the fourth; the first three ventral joints slightly impressed 

 at base. The legs are rather short; all tarsi 5-jointed; first joint of 

 hind tarsi longer than the second, but shorter than the second and third 

 joints together, shorter than the claw-joint. 



The species live under the bark of deciduous and pinaceous trees, 

 lAhich are attacked by bark -beetles, tiie young of the latter supposedly 

 serve as food for these and their larvae. - In this country 3 species are 

 heretofore found, a fourth, which like these is distributed in North and 

 Middle iiurope, is included in the following. 



Key to Species. 



1. Pronotum anteriorly as broad as elytra, distinctly broader than long. 



L. 2.5-3 mm 1. P. reptans Jravh. 



Pronotum narrower than elytra 2, 



2. Pronotum with isolated punctation, rather strongly glistening, pos- 



terior half the elytra red. the base set off v.ith black. L. 2.5- 



3 mm 4. P. latens lir. 



Pronotum densely punctated, dull or feebly glistening 3. 



3. Pronotal surface extremely finely shagreened , , dull. L. 2.5-3 mm... 



2. P. nnjustiformis fcaudi. 



Pronotal surface not shagreened, feebly or moderately shining. L. 2.5- 

 3 ram 3. P. corticalis -^ravh. 



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