The writer has had by him for some years a sniall series consisting of both sexes of an interesting mosquito taken on one of the small coastal islands near Victoria, British Columbia. Description has been postponed from time to time in the hope that further specimens, together with larvae, would indicate the status of this species in relation to another form occurring commonly in the mountains, and interior and northern parts of the province. Since there seems little chance of these being secured at present it is thought best to offer a name and describe the species at this time.