1*5 



Proportion of Males to Females of Reared Insects. 

 One is often struck by the large proportion of males 

 among mosquitoes artificially raised, a troublesome 

 fact when feeding experiments are being conducted. 

 According to Berkeley, if the larvae are kept supplied 

 with abundant food the proportion of males is much 

 reduced. 



ECTOPARASITES OF ANOPHELINES 



These are hexapod larvae of Acarines, family Hyd- 

 rachnidae, the genus possibly Eylais, Hydrodroma, 

 Hydroph antes or Diplodontus, but cannot be identified 

 with certainty in the larval stage. 



