Abstract
In Malaya 2 sibling species have been confused under the name Anopheles Philippinensis. They arc best distinguished by differences in the pupae and males. One species appears to be A. philippinensis Ludlow, the other is A. nivipes Theobald, long regarded as a synonym of philippinensis. Larvae of the 2 species often occur in the same breeding place. The possible distribution of these two outside Malaya and the problem of distinguishing them from A. pallidus are briefly discussed.

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