Four new species of Drosophila mesophragmatica group are described. The new species were found in paramo and remnants of Andean forest and in the Ecuadorian Andes. These species were captured from 2200 to 4000 m. The new species are: D. cashapamba sp. nov., D. chorlavi sp. nov., D. rucux sp. nov. and D. yanayuyu sp. nov. With these new species, the number of species of the D. mesophragmatica group has been increase to 17. The species of this group are distributed mainly in the Andes of South America.
Diversity; genitalia; morphology; taxonomy
