Insects, etc., Tyijurious to the Pear, 



339 



Life-History. 



The adult sawfly appears in May and June, tlie earliest, date 

 noticed being the 10th of May, but not until nearly the end of the 

 month did they appear in any numbers in 1889. In 1890 I took 

 a few females as late as the 3rd of June. 



The female is black ; the antennie and legs yellowish ; the abdomen 

 tawny at the apex, with a yellow triangular mark on the sides of 

 the segments, these lateral patches being largest towards the end 



FIG. 223.— TENT OF SOCIAL PEAR SAWFLY. 



(One-third natural size.) 



of the abdomen ; ventrally are to be seen bands of yellow ; the bases 

 of the mid and hind legs are dusky ; the wings transparent, with 

 a broad smoky band below the dark brown stigma, and more or 

 less iridescent in the sun ; palpi and mandibles yellow. The male 

 has the abdomen reddish-yellow from the second segment to the 

 apex, and the lower part of the head yellow. They vary in length 

 from i to a little more than i inch across the expanded wings. 



z 2 



