THE INSECT WORLD. 



335 



Station, hasfounci a species of this family concerned in producing 

 a lorm oi potato scab in that State. He has named it Epidapus 



Fig. 383. 



Sciara Iritici. — a, larva; b, c, pupa from below and side; d, female fly; e^f, tips of 

 female and male abdomen. 



scabci, and beh'eves it to be responsible for much of the injury 

 usually ascribed to the germ disease. This may be locally true, 



Fig. 384. 



Epidapus scabei. — Wingless female and structural details. 



but I have never found any trace of the insect in New Jersey, 

 though I have examined many hundreds of scabby potatoes for 



