INJURIOUS AND BENEFICIAL INSECTS OP CALIFORNIA. 19 



they usually get the blame for any damage done. In lettuce the roots 

 and heart are destroyed. 



Food. — Specimens of this particular species have been received in 

 heads of lettuce where it then appeared to have entered the roots and 

 worked into the heart, as shown by the photograph (Fig. 17). An 

 attack by a related species (J. virgatus Wood), on lettuce plants, espe- 

 cially the outside leaves near the main stalk, was reported in Ohio a num- 

 ber of years ago. 12 Potatoes, partially decayed and full of these milli- 

 peds, have been received from various parts of the State. We also 

 note a similar condition reported in Dakota, 1889. 13 Dr. R. V. Cham- 

 berlin reports that a species, Julus lurcus Meinert, is frequently 

 found in cabbage heads in Europe and Julus cceruleocinctus Wood 

 damages the fruits and roots of strawberries in the Eastern states. 

 From what information we now have at hand it is evident that the 

 species in question does infest plants under certain conditions, but 

 until further data are furnished it should not be said that perfectly 

 sound and healthy tissues are devoured to any great extent. 



Control.— If it is a fact that root crops, like potatoes, are eaten a 

 convenient method of control would be to slice the potatoes, roll them 

 in Paris green and place them about in the places where the infesta- 

 tions occur. 



12 Insect Life, IV, p. 400, 1892. 

 13 Insect Life, I, p. 316, 1889. 



