1.Hexyl resorcinol, in 1:1000 dilution in 30 parts glycerin and 70 parts water, has proven a satisfactory disinfectant for Culicid eggs provided they are immersed in the liquid for a period of two minutes.
2.Anopheline larvae are able to utilize material in solution and colloids in suspension from normal pool water. This has been demonstrated by the use of Seitz-Werke filtered media and the dialysable and non-dialysable fractions of water from breeding habitats.
3.Larvae of Anopheles crucians and A. quadrimaculatus are able to live up to a period of eleven days and to make significant growth, under sterile conditions, in Seitz-Werke filtered water.
4.These larvae are unable, however, to develop in the dialysate of water from the same breeding pools.
5.In the case of the non-dialysable fraction of the same type of water it has been found that the larvae may live up to six days and make a slight significant growth, indicating that the normal water colloids may be of considerable importance in the nutrition of anopheline larvae.