Rhamphus oxyacanthae

A small (1.5 to 2 mm) black weevil.  The larvae of this species produce leaf mines on the leaves of Hawthorn and the mines may be found more easily than the adults. The larva inside the mine is yellow and squat, with a black head.

Many species of moths also mine hawthorn leaves

Adult mine

Adult: Unless identified by a recognised expert, photographic evidence is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used. Note the beetle's size and describe the identifying characters. It is advisable to retain the specimen in case further checks are needed.  Mine: provide good backlit photographs that show the larve inside the mine. 

Where Hawthorn occurs.

Rhamphus oxyacanthae leafmines are most likely to be encountered in autumn.

Widespread in England and Wales, but sometimes local in distribution.

Infrequently recorded in Leicestershire and Rutland.