Measurement (mean values) of the four Culicoides species first reported in Azores archipelago.

♀ = Female; ♂ = Male; Costa = Length of the wing from arculus to the terminus of second radial cell; Ratio 3/(1+2) = Length of the third palp segment/Length of the first and second palp segments; Antennary Index = *Length of eleventh to fifteenth antennae segments/Length of the third to tenth antennae segments and **Length of thirteenth to fifteenth antennae segments/Length of the third to twelfth antennae segments; Ratio = ***Length of the eleventh antennae segment/Length of the tenth antennae segment and ****Length of the thirteenth antennae segment/Length of the twelfth antennae segment. First spermatheca: mean value of the biggest spermatheca of different specimens; Second spermatheca: mean value of the smallest spermatheca of different specimens; n.a. = Not applicable.