Haemagogus tropicalis is strictly a forest-dwelling species from the fertile valley area of the Amazoˆ nia forest. It is a diurnal mosquito, and the oviposition sites for the species include tree holes. The eggs of Hg. tropicalis used in this study were from females captured on Combu´ Island, situated across from the city of Bele´m, Guajara´ Bay, state of Para´ , at 1u259S latitude and 48u259W longitude. The eggs are elliptical and ,575 mm long with a width of ,144 mm. The ventral surface of the chorionic reticulum has regular chorionic cells with hexagonal and sometimes pentagonal ornamentation. Each chorionic cell has a thick external chorionic reticulum with regular borders. The interior of the chorionic cells have small, evenly distributed tubercles, and the dorsal external chorionic reticulum appears porous. The micropylar apparatus, located on the anterior area of the egg, was formed by a collar with a well-developed frame. Centrally, the micropylar disc had a diameter of ,20 mm and the micropylar orifice is 2.1 mm in diameter. These data may enable construction of taxonomic keys for identifying eggs of Haemagogus species.