| autumn southward 'return' migration of the mosquito culex tritaeniorhynchus in china. | direct evidence for a southward 'return' migration in autumn of the mosquito culex tritaeniorhynchus in china was obtained by aerial sampling with a net suspended from a balloon. in a preliminary study between 2 and 20 september 1990 at jiangpu, near nanjing, in jiangsu province, 11 females and 4 males of this species were taken at heights of 150-250 m. during 17-26 october 1991 at dongxiang in northern jiangxi province, 44 mosquitoes (8 males, 36 females) were caught in the aerial net at height ... | 1993 | 8268485 |