Key to the subgenera and species (adult females) of Culiseta in Saudi Arabia

1 Scutum with distinct longitudinal stripes of white scales, resembling a lyre in shape; femora and tibiae with pattern of pale spots and white stripes; anterior margin of costa (C) almost entirely pale-scaled; lateral margin of antennal pedicel, posteroventral area of cervix and lower proepisternum with scales (subgenus Allotheobaldia).......................... longiareolata

– Scutum with pale scales arranged in a more diffuse pattern; femora and tibiae without pattern of pale spots and white stripes, some scattered pale scales may be present; anterior margin of C mainly dark-scaled or with pale and dark scales intermingled; lateral margin of antennal pedicel, posteroventral area of cervix and lower proepisternum without scales (subgenus Culiseta)........................................................................................... subochrea