Sycamore Louse. 



251 



The past summer I have received from apiarists of Indiana 

 and Ohio, a very large, dark gray, plant louse which worked 

 on the sycamore, and is reported from both states as keeping 

 the bees actively employed for some weeks. This louse is one- 

 fourth of an inch long. The winged lice measure three- 

 eights of an inch to the tips of their wings. 



The veins of the wings, as also the short nectaries — the tubes 

 at the posterior part of the abdomen — show that this louse 

 (Fig. 122) belongs to the Genus Lachnus. The lice of the 

 Genua Aphis — ^of which there are innumerable species — have 



Fig. 122. 



Female. 



Fio 123. 



Male. 



Female. 



Male. 



longer nectaries (Fig. 123), from which ooze large drops of 

 nectar. This is much relished by the ants, which often care 

 for these lice as tenderly as for their own young. 



