MONTANA EXPbRIMENT STATION. 



219 



early in the season and that the large numbers to be found later in 

 the season is the result of the rapid multiplication. It is apparent, 



therefore, that the comparatively small number of lice that the bee- 

 tles eat early in the season must have a great effect in the abundance 

 of the lice later in the season. 



Though the larvae of this lady-bug eat large numbers of the lice 

 later in the season when they have become very abvmdant, we look 

 upon the work that they do as being of much less value than that of 

 the adults. . . 



