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Pupae of 2 western species, Ochlerotatus aloponotum and Oc. campestris, are described and illustrated. Sources of the original descriptions and known stages are given. The relation of Oc. aloponotum to Oc. excrucians and characters to separate them are discussed.
The pupae of Ochlerotatus dorsalis and Oc. squamiger are completely described and illustrated for the first time. Considering the entire pupal morphology, characters to separate the 2 pupae are discussed.
The previously unknown pupae of Ochlerotatus flavescens and Oc. melanimon are described and illustrated. They will both be included in a forthcoming key to known pupae of genera Aedes and Ochlerotatus in the Nearctic Region. Characters to recognize each are explained.
The pupae of Ochlerotatus shortti and Oc. elsiae are described and illustrated. These species occur in the Himalaya Mountains at middle range altitudes. Characters to recognize each are explained.