some mosquitoes bite when they're hungry, no matter the time of day.
In the Mediterranean area the common mosquitoes tend to wait until dark, but in recent years there has been an invasion of "Asian tiger mosquitoes" (AKA "forest day mosquito") which bite at any time of day, making it much more difficult to enjoy time outdoors in summer :-(
WHO document from link below suggest that they are active primarily at night, very similar to anophelines.
http://www.who.int/water_sanitation_health/resources/vector007to28.pdf
Mosquitoes do not sting, and technically do not bite either. They rasp and tear a small hole through the skin to inject anti-coagulant so that they can suck out blood.The word "mosquito sting" refers to the swollen area around a mosquito bite, which is not a sting but can resemble one.
They sting,and draw blood. -Jee Hoon Micheel
Swabbing with vinegar can take some of the ouch out of a sting, especially mosquito bites.
They bite.
formic acid known as methanoic acid
No Hera did because she sent a mosquito to sting Io and chase her away from Grecce
Locusts do not bite or sting, but they can pierce your skin and suck your blood like a mosquito. They do this not because they are biting or stinging you, but because they think you are a tree and want to eat.
Asian tiger mosquito or forest day mosquito(Aedes albopictus)
20th august
Day
Everything that exists. Even dinosaurs were extinct because of the mosquito's sting was poisonous, and when it stung people, they got cardiovascular disease.
Brand New Day - Sting album - was created on 1999-09-28.