Answer:
It is correct, the choice that you place in here.
According to the data I found on research, on this type of mosquito, the Culex, or Culicine, females do present a blunt abdomen tip, which is different from the Aedes and other types of mosquito, palpi that are much shorter, and less bushy than in males either of their own type, or another type, and antennae with shorter, fewer hairs in them. The antennae and palps are shorter than the proboscis, as well. Knowing these factors help scientists to recognize the female mosquitoes of the Culex subfamily, from other females and from males of the same family, as well.
So the answer choice A: Blunt abdomen tip; antennae and palps shorter than proboscis, is correct.