1. 
   Larch sawfly
   The larch sawfly (Pristiphora erichsonii) is a species of sawfly. The adult sawfly resembles a black wasp, is about ½ inch in length with a thick waist and has brown to orangish markings on the abdomen. Larvae have black heads, gray-green bodies with white undersides, and are about 15–18 mm long...
   Found op http://en.wikipedia.org/wiki/Larch_sawfly
   
   
2. 
   larch sawfly
   (from the article `sawfly`) ...found on flowers. Many are poor fliers. The leaves of pear, cherry, and plum trees are eaten by the destructive North American species Caliroa ...
   Found op http://www.britannica.com/eb/a-z/l/16
   
   

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