Streamlined windscreen wiper

A streamlined windscreen wiper, in particular for a vehicle, comprising:

• a longitudinal wiper blade;
• a longitudinal streamlined fairing including a central mounting and at least one end cap disposed at a distal end of said central mounting;
• an adapter element fixed to the central mounting at a distal end thereof;
• the adapter element including a central web and two legs extending substantially perpendicular from opposing edges of the central web, one of a plurality of end caps being articulated to the adapter element;
• and
• a retention means including a first portion formed in the adapter element and engaging a complementary second portion extending from a lower surface of the central mounting, such that the complementary second portion of the retention means includes a rib extending from a lower surface of the central mounting and the rib is oriented substantially perpendicularly to the central web of the adapter element;
• the first portion including a window provided in the central web of the adapter element, the window being engaged by at least one rib;
• and
• wherein the complementary second portion of the retention means includes a pair of chevron-shaped ribs each abutting at least one edge of the window.