Aedes (Och.) trivittatus




Canada, Mexico, United States, contiguous lower 48

Species-specific Diagnostic Characters, Adult Stage

  • 1. Maxillary palpus of female much less than half the length of either the antenna or proboscis
  • 2. Postspiracular setae present
  • 3. Prespiracular setae absent
  • 4. Scales on the dorsal surface of the radial sector and media narrow



The larvae of Aedes trivittatus may be found any time during the summer following rains, in floodwater pools in meadows, swamps, and woodlands. The females are persistent biters, attacking at dusk and during the daytime, even in bright sunshine, when the vegetation in which they hide is disturbed. (Carpenter and LaCasse 1955:251)

Medical Importance

Aedes trivittatus is a vector of Trivittatus virus which occasionally causes febrile illness in humans (Viral Infections in Humans, Evans and Kaslow 1997:168). Possible vector of dog heartworm (Dirofilaria immitis).

Culicidae » Culicinae » Aedini » Aedes » Ochlerotatus
habitus image

Photo credit: J. Stoffer, WRBU.

Additional References


Adult Stage, detail images:

Click on image to open larger view in a separate window. Higher-resolution detail images of some specimens are available on request.

Adult Stage, illustrations:

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