The results showed that the characteristics of the microclimate at theoverwin-tering places for Culex pipiens pallens were warm (temperature≥4. 9°C), moist (RH≥65. 6%),dim(alumination 2. 0～5. 2 lux)and sheltering from the wind (wind speed≤0. 25 m/s),and were utterly different from those of the outdoor weather at the same time.
Accoding to the results of investigation the author put forward aprimary auggestion about the farmhouse microclimate criterion in this region. Winter:The temperature at the center of the room: 8～12℃The vertical or level temoerature variathon: 3℃The temperature variation between night and day: 4～6℃The current: 0.1～0.15m/s. The air hunidity: 30～50%.
This standard provides ventilation volume, microclimate (including temperature,humidity and wind velocity), hygienic requirement of illumination and permissible concentration of CO 2 (cited from GJB 2261-95), and also limited values of air pollutants (including CO, NH 3, H 2S, inhalant particles, total bacterial count) in the tunnel for stationary troops when occupied by personnel.