ULTRASTRUCTURE OF EGGS OF ANOPHELES-RONDONI, ANOPHELES-LUTZII, AND ANOPHELES-PARVUS, 3 SPECIES OF THE SUBGENUS NYSSORHYNCHUS

The ultrastructures of the eggs of Anopheles (Nyssorhynchus) rondoni ( Neiva & Pinto), Anopheles (Nyssorhynchus) lutzii Cruz, and Anopheles ( Nyssorhynchus) parvus (Chagas) are described and illustrated with scan ning electron micrographs. The egg of Anopheles rondoni is similar in several respects to those of other species of the Argyritarsis Section . The egg of An. lutzii is similar to that of Anopheles antunesi Galva o and Amaral in having floats widely joined anteriorly on the ventral side, and the anterior end barely visible beyond the floats. The egg o f An. parvus is remarkable in possessing an anterior fingerlike struct ure that bears several lobed tubercles at the apex. The fingerlike str ucture and the micropyle are within the prominent anterior crown forme d by the frill. The egg of An. parvus has floats with the anterior pol e uppermost, which is an unusual position for Anopheles.