(Page 89) 

 the femora are somewhat constricted, at middle and distally broad, at 

 knee-joints with dense yellow hair; fore-tarsi with 4, the others 5 joints; 

 first joint of hind tarsi elongated, about as long as the two following 



joints together. (Page 90) 



Of the 2 European species, which belong to this genus, the one, inf lata 

 Zett., has its habitat in Lapland, and is found with Formica rufa ; the 

 other, strumosa Jravh., is distributed in North and Middle iurope and 

 also found in this country. It is proved that it lives exclusively in 

 the ant-hill, there undergoing all its developing as a dependent foster 

 child of the ant-hosts. The ants treat it and its young as their own, feed 

 as well the beetle as its larvae with regurgitated nutritious juice, and 

 take them along when changing abode. In return the beetle permits the ants 

 to lick the juice vjhich it exudes on diverse places of the body, especial- 

 ly the hair-tufts of abdomen. Furthermore it is later proved (E. "/asmann), 

 that it is not always satisfied with the feeding by the ants alone, but 

 also helps itself to some nourishment, inter alia, ant-eggs. The same 

 is the case with its larvae. 



1. L. strumosa ^ravh. 



(Jravh. ?'licr. 91; Erichs. -ten. Spec. Staph. 203; Kraatz Ins, L. II, 

 113; Thorns. Skand. Col. II, 242; Muls. et Rey Lr^vip. 1873, 13; Janglb. 

 Kaf. v.. II, 115). 



Reddish-brown, greasy -jlistening; The head, thorax, and abdominal 

 middle joints most often brownish-black. 



The head is flat, finely shagreened and Gull, anteriorly broadly grooved; 

 the antennae not thickened diatelly, considerably longer than head and 



•142- 



