The eggs of Anopheles punctipennis (Say) and Anopheles perplexens Ludlow are morphologically very different, despite close genetic affinity between the species. The egg of An. Punctipennis is distinct in ventral view by virtue of its wide deck, barely narrowed in the middle of the egg, surrounded by a deep, outwardly flared frill, which conceals the ventral plastron. The deck in An. perplexens, in contrast, is much less wide anteriorly and posteriorly and narrows appreciably in the middle of the egg. The frill is low and does not hide the ventral plastron, which appears as two strips flanking the middle deck. Other differences in the lateral profiles and in other structural details are illustrated in electron micrographs and extensive tabulations of morphometric data.