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A new recessive, sex-limited mutant, cut antenna (ca), of themosquito Aedles (Einlaya) togoi (Theobald) was located in the order of p (pigmented pupa)-rtt t(ruby eye)-ca in linkage group 2. The recombination values between P and iu, and between ru and ca were 27.06± 1.70 to 31.31± 1.96% and 6,98± 1,08 to 11,77± 1.240/o, respectively. 4 to 7 antennal segments are lost in ca females but the ca allele does not affect male antennae ; the allele appears to exhibit complete penetrance with some variation in its expressivity. Basic genetics of the mosquito Aedkes (Einlaya) togvi (Theobald), a natural or experimental vector of filariae, has been studied in our laboratory to accumulate the materials needed for comparative genetic studies ameng the Aedes mosquitoes and for genetic analysis of problems of medical importance. Eight genetic markers have been placed in all three linkage groups of this mosquito, its haploid chromosome number being three (Tadano, 1977a, 1978), but further work of this series should be continued for establishment of precise linkage groups in this .specles. The inheritance of a new recessive mutant, cut antenna, was investigated using representative markers of the three linkage groups. This paper presents results of the crosses involving cut antenna. MATERIALS AND METHODS Several female pupae of cut antenna (ca) were detected during microscopic work on single families of the Miura strain in July, 1975. No males of this trait have been found in all generations of this colony; therefore, each generation wa$ maintained . L *Rnftx: ag?p7tztvaf$irt#fi$sttz#igz (+213 JIIasTfiktaXWts2095) by putting ca females together with their wild-type brothers into the cage. For this reason only ca females were utilized for all crosses performed in the present study. The Miura and Manazuru strains were employed as wild-type strains for production of heterozygotes for the mutant alleles used here. The Miura and Manazuru strains were collected in rock pools on the seashores at Miura City and Manazuru, Kanagawa Prefecture, respectively. The metheds for rearing and crossing mosquitoes were same as these previously reported (Tadano, 1976, 1977b), Masscrosses were made in all experiments, but single blooded females were isolated in separate plastic cups and each egg batch laid by single females was hatched in a plastic box containing salted tap water (about 2%); the hatched Iarvae were reared separately as a family. After classification of offspring phenotypes was performed in each family, chi2-tests were made to examine whether observcd phenotype ratios in each family fit the expected ratios, Only families in which all the observed ratios did not differ significantly (P>O.05, with one degree of freedom) from the expected were pooled for subsequent statistical treatment, from which all other 239 The Japan Society of Medical Entomology and Zoology NII-Electronic Library Service he apanSociety f edicalEntomology ndZoology

Cut antenna, a new sex-limited mutant of Aedes togoi