(Page 32) 

 other genera of the group. 



The body (Fig. 13) is broad and rather flat, posteriorly almost cunei- 

 form-tapering; head in proportion to pronotum small, with small, a little 



(Page 33) 

 protruding eyes and with margined temples and genae; antennae short, ro- 

 bust, their middle and next-last joints closely compact. 



Pronotum short and very broad, most often broader than elytra, flat- 

 ened out to the sides, its posterior margin at each side broadly produced 

 and posterior corners retracted, acute and encircling the humeri; elytra 

 together broader than long, their dorsal plane separated from the strong- 

 ly deflected side-margin (side-cover) by a sharp ridge, which begins at 

 the humeral angle and runs out into the acute, retracted corners, inside 

 which the posterior margin is sharply ;lnourwed. The first three free dor- 

 sal abdominal joints are feebly depressed at base, its side-margins are 

 coarse and broed. The lejs rather short; tarsi fine, all 5-jointed; first 

 four jOints of fore-tarsi short, together as long as olaw-Joirt; first 

 joint of hind tarsi longer than the second, shorter than the claw- joint. 



The species live exclusively in the mounds of various ants, Formica 

 species, where they as well as their whitish-yellow, long-haired larvae 

 feed on the animal offal of the mound, dead ants and pupa-skin. The ants 

 tolerate them. At the exodus from the mound they follow the ant swarm, and 

 at winter time seek the dept of the mound together with the ants. 



In fc;iddle Kurope 4 species are found, which aro closely allied, and 

 possibly ere forme of the spmb species; 3 of these are found in this country. 



-39- 



