THE LEAD-CABLE BORER IN CALIFORNIA. 35 



used on fly paper and another used for banding trees, about half the 

 length with one and half with the other. The cables were examined 

 about October 1 and a number of insects were found caught. Four 

 of these were adults of the lead-cable borer. 



These experiments indicate that the beetles are common enough 

 around the cables to cause the damage accredited to them.^^ 



Emeegknce Experiments. 



Table 5 gives the results of emergence experiments conducted at 

 Los Gatos, Calif., in 1921. 



15 During 1922, commercial sticky material used on fly paper was placed upon tlie 

 aerial telephone cables in use in four cities ; in each city several localities were selected. 

 This sticky material was placed on the cables in May and .June and remained until the 

 season, was over in September. 



In San .Jose, 50 sheets were placed upon the cables, in 5 plac>c?s, 10 sheets to a. 

 place ; these sheets were about 15 inches long. Near the tannery in Santa Clara 2 

 beetles were caught ; at Station No. 2, 1 beetle ; across from the wood yard where 

 thousands of beetles were reared (Station No. 3) 1 beetle was caught; Station No. 4, 

 no beetles ; Station No. 5, 1 beetle ; or a total of 5 for San Jose. 



In the other three cities, the Pacific Telephone & Telegraph Co. placed the sticky 

 material upon the cables. In Los A^ngeles, 8 localities were selected and from 1 to 8 

 sheets placed on the cables ; only 3 beetles were obtained and these came from locality 

 B with 7 sheets on the cables. 



In Sant.a Rosa, 4 localities with 6 sheets each were selected : 1 beetle was found on 

 the sheets from locality a. 



In Monterey, 5 localities were selected, 3 in Monterey, 1 at Carmel Hill, and 1 at 

 Salinas ; Monterey No. 4 caught 1 beetle on 8 sheets on the cables and Salinas No. 1 

 caught 1 beetle on 8 sheets on the cables. 



Full data were not received from the telephone company in time to include in this 

 paper. 



The results seem to indicate that all along the Pacific coast a . few beetles are 

 continually going to the cables in all localities, but nowhere do they appear in numbers. 

 The damage is only incidental and there appears to be no special attraction in the 

 cables to draw the beetles. If the beetles get down between the rings and the cable, 

 the contact causes them to bore ; otherwise they crawl or fly off without doing any 

 damage. 



