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JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 8 



collected and reared material until November of the present j^ear, when 

 the beetles were sent to Dr. Chittenden for identification. He pro- 

 nounced the beetle to be the common Oberea tripunctata (Swederes). 

 The literature on 0. tripunctata until a few years back referred only 

 to the work of the insect on raspberry and blackberry. Hence, I 

 surmise, according to a statement of Dr. Chittenden's, these were 

 really references to 0. bimaculata (Oliv.). In 1908, Forbes ^ mentions 

 this species as being found working on elm and in 1911 as working on 

 dogwood. As this seems to be a new pest for Minnesota and as the 

 life-history differs from that given by other observers, it seemed worth 

 while to bring it to your attention. 



Fig. 1. Shows work done b}' adult of Oherea tripunctata and the relative position 

 of the egg. (Somewhat reduced.) 



The Work of the Adult 



The elm leaves, as shown in Fig. 1, were found on infested twigs and 

 at the time the work was suspected to be that of the beetle in question. 

 (This of course has never been proved.) Many twigs were found com- 

 pletely girdled in several places, evidently due to more than one beetle 

 ovipositing. Below the last complete girdle, there was seen a double 

 irregular slit, evidently made b}" the two ovipositors not quite coin- 

 ciding, which extended 7 to 8 mm. down the stem to an incomplete 

 girdle. Half way between these two points, the egg was inserted under 

 the edge of the slit bark. 



^ Forbes, S. A. Lac. cito. and Twenty-sixth State Ent. Rep., Illinois, 1911. 



