Symptoms can range from a mild flu-like illness to seizures and coma. Ohio leads the nation in number of cases, followed by Wisconsin, Minnesota, Illinois and Indiana. Geographic Distribution Aedes triseriatus occurs from Florida, north to Ontario and Quebec, and west to the Dakotas and Texas. From north to south, the species experiences quite a range of temperatures and conditions, and it has successfully adapted to local requirements. The tarsi and proboscis are uniformly dark.
Silvery scales cover the sides of the thorax and are the most diagnostic characteristic.
The abdominal segments are dark and unbanded. It can be found in a single water-filled tire behind the garage or in a tire dump with thousands of tires. In scrap tire yards, adults reach incredibly high numbers, as many as 60,000 females per acre in mid-summer. Aedes triseriatus has become an important urban mosquito because of its association with scrap tires. In addition to the Asian tiger and yellow fever mosquitoes, Tris larvae occur with a variety of Culex and Anopheles mosquitoes.