Reproductive Isolation within the Aedes Atropalpus Group, and Description of Eggs

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Abstract
The Aedes atropalpus group is made up of 2 species rather than 4 subspecies. From biological crosses in the laboratory, it was shown that A. a. epactius, A. a. perichares and A. nielseni crosses have a high genetic affinity, while A. a. atropalpus has a low genetic affinity when crossed with the other 3. In addition to this, A. a. atropalpus is autogenous while the other 3 subspecies are anautogenous. Scanning Electron Micrographs of the chorionic sculpturing of the eggs support the concept of 2 species. The egg of A. a. atropalpus is distinct from that of the other 3 subspecies. The evidence strongly supports the elevation of A. a. atropalpus and A. a. epactius to species status. A. a. nielseni and A. a. perichares do not differ biologically from A. a. epactius and should be treated as 1 species.

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