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 following species attain not a little likeness with species.of the genus 

 Thiasophilas , with which their mode of living in the ant nest also is mu- 

 tual. 



Fusiform, rather broad; black or pitch-black, with rather strong greasy 

 shine, finely haired; elytra reddish-brown; abdominal tip, antennal base, 

 also the legs reddish-yellow. 



The head is rather broad, however much narrower than pronotum, convex, 

 almost impunctate, polished; antennae slender and rather long, their third 

 joint longer than the second, the outer joints (5-10) almost of equal length 

 and equal breadth, feebly transverse, closely compact, distal joint as long 

 as the three preceding joints together. Pronotum scarcely narrower than el- 

 ytra, twice as broad as long, anteriorly roundly narrowing with deflected 

 fore-corners and prominent hind corners, posterior margin inside these dis- 

 tinctlji wavedt'dorsum slightly convex, rather finely and densely punctated, 

 sometimes with a feeble transverse impression before scutellum. Elytra 'fs 

 longer than pronotum, with dense and rather fine, scabrous punctation, their 

 posterior margin inside the outer corners distinctly waved; abdomen rather 

 strongly tapering, very glistening, somewhat long-haired with many side- 

 bristles, its foremost dorsal Joint with fine and isolated punctation, the 

 following almost smooth. L. 3.5-4 mm. 



In the 3^ the abdominal sixth free dorcal Joint at middle obtusely usvedi . 



Distributed everwhere and often numerous in tlie mounds with Formica rufa 

 and pratensis . It is tolerated by the ants and probably assist these In de- 

 vouring dead organic maltfir. 



-202- 

 *)meaning one wave curved Inward- Incurved, Translaror. 



